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Dimocarpus longan fruits ….Trái Nhãn ….
Image by Vietnam Plants & The USA. plants
Trái Nhãn Quế ( hay Huế ??? ) ; hạt to, cơm mỏng và dai, dòn dòn , ngọt vừa .
Vietnamese named : Nhãn
Common names : Longan, Dragon eye, Leng Keng
Scientist name : Dimocarpus longan Lour.
Synonyms : Synonyms: Nephelium longan (Lam.) Carm.; Euphoria longana Steud.
Family : Sapindaceae. Họ Bồ Hòn
Kingdom:Plantae
(unranked):Angiosperms
(unranked):Eudicots
(unranked):Rosids
Order:Sapindales
Genus:Dimocarpus
Species:D. longan
Links :
**** vho.vn/view.htm?ID=2560&keyword=gan
Nhãn – Dimocarpus longan Lour. (Euphoria longan (Lour.) Stend.), thuộc họ Bồ hòn – Sapindaceae.
Mô tả: Cây cao 5-10m, tán lá tròn xoè ra và rậm rạp. Cành non có lông. Lá mọc so le, kép lông chim, gồm 3-5 đôi lá chét nhẵn, mặt dưới màu thẫm hơn. Hoa xếp thành chuỳ mọc ở ngọn cành và ở nách lá, màu vàng nhạt. Quả tròn, vỏ quả vàng trơn nhẵn. Hạt đen nhánh. Áo hạt màu trắng trong bao quanh hạt và không dính vào hạt, khi chín thì ngọt và ăn mát.
Bộ phận dùng: Áo hạt (hay gọi là cùi) – Arillus Longan, thường gọi là Long nhãn nhục. Hạt, lá cũng được dùng.
Nơi sống và thu hái: Gốc ở Ấn Độ, được trồng ở vùng đồng bằng. Nhãn dễ trồng, mọc nhanh, thích hợp với đất thịt pha cát, nơi có lớp đất canh tác sâu. Có thể trồng bằng hạt, bằng cành chiết hay ghép cây. Độ 4-5 năm thì có quả, thời gian cho quả cũng rất lâu. Vào tháng 6-8, khi Nhãn chín, thu về, phơi nắng hay sấy cho cùi vàng đều thì lột cùi, phơi tiếp đến khô thì dùng. Hạt dùng phơi khô. Rễ và lá thu hái quanh năm.
Thành phần hoá học: Cùi Nhãn còn tươi có các thành phần sau, tính theo %: nước 77,15, tro 0,01, chất béo 0,13, protid 1,47, hợp chất có nitrogen tan trong nước 20,55, đường saccharose 12,25, vitamin A và B. Cùi Nhãn khô chứa nước 0,85, chất tan trong nước 79,77, chất không tan trong nước 19,39, tro 3,36. Trong phần tan trong nước có glucose 26,91%, saccharose 0,22%, acid tartric 1,26%, chất có nitrogen 6,309%.
Hạt Nhãn chứa tinh bột, saponin, chất béo và tanin. Lá chứa quercetrin, quercetin, tanin.
Tính vị, tác dụng: Cùi Nhãn có vị ngọt, tính ấm; có tác dụng bổ tâm, an thần, kiện tỳ, làm tăng cơ nhục. Hạt có vị mặn, tính bình, có tác dụng thu liễm chỉ huyết. Lá có tác dụng hạ nhiệt, tiêu viêm. Rễ có tác dụng lợi tiểu và hoạt huyết.
Công dụng: Các bộ phận khác nhau của Nhãn được dùng như sau:
- Cùi Nhãn dùng chữa trí nhớ suy giảm hay quên, tư lự quá độ mất ngủ, thần kinh suy nhược, tâm thần mệt mỏi hồi hộp, hoảng hốt, gan kém, tỳ kém, huyết hư, rong kinh, ốm yếu sau khi bị bệnh. Dùng 9-15g.
- Rễ chữa dưỡng trấp niệu, bạch đới, thống phong. Dùng 15-30g.
- Lá dùng ngừa sởi, trị cảm lạnh, sốt rét, viêm ruột. Dùng 10-15g. Lá nấu nước tắm trị eczema bìu dái.
- Hạt dùng trị đau dạ dày, đau thoát vị, mụn nhọt và bỏng, vết thương chảy máu. Dùng 10-15g dạng thuốc sắc. Đồng thời tán bột, hoà với dầu Dừa dùng bôi vào chỗ đau.
- Vỏ cây và vỏ quả dùng chữa bỏng, chữa sâu răng. Đốt, tán bột hay nấu cao bôi.
Ghi chú: Còn có thứ Nhãn tà, Nhãn cám – Dimocarpus longan Lour. subsp. longan var. obtusa (Pierre) Leenh., có quả ăn được và dùng làm thuốc như Nhãn và cỏ cũng dùng chữa vết thương và cầm máu
**** www.khuyennongvn.gov.vn/e-khcn/ghep-bo-cay-nhan-xuong-com…
Ghép bo cây nhãn xuồng cơm vàng để ngăn chặn bệnh chổi rồng đang gây hại hàng ngàn ha nhãn tại ĐBSCL
**** cnx.org/content/m30716/latest/?collection=col10800/1.1
sự ra hoa và biện pháp xử lý ra hoa nhãn
**** www.thaythuoccuaban.com/vithuoc/longnhan nhuc.htm
**** thuocdongduoc.vn/index.php?option=com_content&view=ar…
____________________________________________________________
**** edis.ifas.ufl.edu/mg049
Longan Growing in the Florida Home Landscape1
Other common names: English – lungan, dragon eye; Spanish – mamoncillo chino, longana; Malaysian and Indonesian – leng keng; Thai – lam yai
Scientific name: Dimocarpus longan Lour.
Synonyms: Nephelium longan (Lam.) Carm.; Euphoria longana Steud.
Family: Sapindaceae
Relatives in the same family: Lychee, rambutan, pulasan, akee, Spanish lime, soapberry
Origin: Mayanmar (Burma), southern China, southwest India, Sri Lanka, Indochinese peninsula
Distribution: China, Taiwan, Thailand, Mayanmar, Cambodia, Vietnam, Laos, India, Australia, Kenya, some Central and South American countries, and South Africa. In the United States longan is grown in Hawaii, California and south Florida. The longan was introduced to the United States in 1903. Commercial acreage in southern Florida was planted in the 1990s and continues to the present.
Importance: Economically the longan is an important crop in southeast Asia and is of increasing importance in Florida.
Botanical Description
Longan tree. Fig. 2. ‘Kohala’ longan tree with fruit.
Credits: Ian Maguire UF/IFAS/TREC
Tree: The longan is a symmetrical, evergreen tree with dense dark green foliage. Depending upon climate and soil type the tree may grow over 100 ft (31 m) tall. However, in south Florida, trees typically grow to 30-40 ft (9.1-12.2 m) in height and width. The crown tends to be round or oblong and the bark is corky.
Longan leaves. Fig. 3. ‘Kohala’ longan leaves.
Credits: Ian Maguire UF/IFAS/TREC
Leaves: The pinnately compound alternate leaves are dark green, shiny, leathery, up to 12 inches (30 cm) long with wavy margins and blunt pointed tips. There are 6 to 9 pairs of leaflets per leaf.
Longan flowers. Fig. 4. ‘Kohala’ longan panicle in flower.
Credits: Ian Maguire UF/IFAS/TREC
Flowers: Inflorescences are terminal, 4 to 18 inches (10-45 cm) long, erect and widely branched. The inflorescence is commonly called a panicle. Flowers on the panicle are held on numerous cymules on the many branchlets of the panicle. The flowers are small and have 5 to 6 sepals and petals, and are brownish yellow or greenish yellow, with a two-lobed pistil and usually 8 stamens. Panicles may carry a few to more than 350 fruit. There are 3 flower types in longan, staminate (functionally male), pistillate (functionally female) and hermaphroditic (bisexual). Flowering in each panicle occurs in progressive openings of staminate (male) flowers first, then hermaphroditic flowers functioning as females and then hermaphroditic flowers functioning as males.
‘Kohola’ longan. Fig. 5. ‘Kohala’ longan fruit.
Credits: Ian Maguire UF/IFAS/TREC
Fruit: The drupaceous fruit are spherical to ovoid, ¾ to 1 7/16 inches (22-36 mm) in diameter and 0.21 to 0.67 oz (6-19 g) in weight. The peel is tan or light brown, thin, leathery and smoother than that of the lychee. The pulp is whitish and translucent; thin in large seeded fruits and medium thick to thick in others. Fruit have 1 seed; globular and shiny, brown to dark brown. The pulp does not adhere to the seed and is flavorful and sweet with 12-21% soluble solids. The time from flowering to harvest is 140 to 190 days.
Season of bearing: The main bloom season for longans in south Florida is from February/March through April and the beginning of May. However, some cultivars will produce off-season blooms after the crop is harvested in late August and September. The off-season crop matures in the fall.
Varieties
There are numerous cultivars of longan; however, world-wide only 30 to 40 are grown commercially. Reliable bearing is the major production problem for longan throughout the world. In Florida, 99% of the acreage is planted with ‘Kohala’. Other cultivars have been introduced, some for a long time and others recently (Table 1). A number of new and re-introductions including ‘Edau’ (‘Daw’), ‘Chompoo’, ‘Haew’, and ‘Biew Kiew’ are under evaluation by several institutions and producers. However, nothing superior to ‘Kohala’ has been identified.
One of the recently introduced cultivars is named ‘Diamond River’. This cultivar is from Thailand and is reported to fruit every year, be precocious, produce off-season, and produce a sizeable late season crop. However, fruit quality is only fair and the tree is very susceptible to limb breakage.
Climate
Longan is a subtropical tree well adapted to tropical climates with distinctive wet/dry periods and subtropical areas with a cool, nonfreezing fall/winter period. Longans are indigenous to lowland and middle elevations in southeast Asia and grow at elevations from sea level to 1500 feet (1.8-460 m).
Longans produce more reliably in areas characterized by low non-freezing temperatures (59°F; 15°C or less) and a dry period during the fall and winter (October-February). Warm temperatures (70-85°F; 21-29°C) during spring, followed by high summer temperatures (80-95°F; 27-35°C) and nonlimiting soil moisture are best for fruit development.
Warm and rainy winters are conducive to vegetative growth and reduce flowering and fruit production. Excessive rains during flowering cause flower drop and may reduce pollination and fruit set. Young longan leaves are sensitive to strong winds during vegetative flushing which may result in leaf dehydration, browning and deformation.
Environmental Stress Physiology
Drought
Longan is tolerant of dry soil conditions. Withholding or reducing watering during the late summer/early fall through winter is recommended to stop or reduce excessive vegetative growth and enhance subsequent flowering during the spring. However, for optimum fruit production and quality, regular irrigation is recommended from flowering through harvest.
Flood
Longan is not tolerant of excessively wet or flooded soil conditions When ambient temperatures are high, young trees may decline and die with as little as 5 to 10 days of flooding or constantly wet soil conditions.
Cold
Longan is slightly less cold tolerant than lychee. Young trees are very susceptible to freezing temperatures with severe damage at 29° to 31°F (-1 to –0.5°C) and may be killed at 26° to 28°F (-2 to –3°C). Older trees are more cold tolerant but branches are injured at 25° to 26°F (-3 to -4°C) with very severe damage or death below 24°F (-4°C).
Wind
Longan trees are tolerant of windy conditions and young trees can generally be established on windy sites. Mature trees pruned to limit their hieght to 10 to 20 ft (3.1-6.1 m) are more likely to survive hurricane force winds. The most common damage from hurricane winds is toppling over of the trees and loss of most limbs. Windy, dry, cool weather during flowering desiccates flowers and reduces fruit set.
Salt
Longan is not tolerant of saline soil and water conditions. Symptoms of salt stress include marginal and tip necrosis of leaves, leaf browning and drop, stem dieback, and tree death.
Propagation
Longan may be grown from seed, however, cultivars do not come true from seed, may be slow to bear, and the fruit of inferior quality. Seedlings may be used for selection of new cultivars or rootstocks. Air layering (marcottage) is the most common propagation method used in Florida. April through August is the best time for air layering and roots form within 10 to 12 weeks. Grafting onto seedling rootstock may be done by side veneer or cleft grafting. Seedlings are usually grafted when pencil size (3/8th inch; 8 mm) or larger stem diameter. Trees may be top-worked by grafting onto selected vigorous shoots. Trees may also be propagated by cuttings with mist and bottom heat.
Production (Crop Yields)
Seedling trees may take up to 6 years to bear fruit, whereas air layered trees may bear fruit 2 to 3 years after planting. In general, longan trees bear erratically (i.e., not every year) and in some years little to no fruit is produced. Yields from individual mature trees may range from 50 to over 500 lbs (23-227 kg).
Spacing
Longans grow fairly fast and at maturity, are large trees. Homeowners should plant longan trees 22 to 25 ft (6.7-7.6 m) or more away from other trees and structures. Trees planted too close to other trees or structures may not grow normally or produce much fruit due to shading.
Soils
Longan trees thrive on various soil types provided they are well drained. They do well on sandy loams, sand and calcareous, rocky soils of south Florida.
Planting a Longan Tree
Properly planting a longan tree is one of the most important steps in successfully establishing and growing a strong, productive tree. The first step is to choose a healthy nursery tree. Commonly, nursery longan trees are grown in 3 gallon containers and trees stand 2 to 4 ft (0.6-0.9 m) from the soil media. Large trees in smaller containers should be avoided as the root system may be "root bound". This means all the available space in the container has been filled with roots to the point that the root system becomes compacted within the container. Root bound root systems may not grow properly once planted in the ground.
Inspect the tree for insect pests and diseases and inspect the trunk of the tree for wounds and constrictions. Select a healthy tree and water it regularly in preparation for planting in the ground.
Planting may be done at any time in south Florida if there is access to water. Otherwise, the best time to plant is in late spring or early summer during the rainy season.
Site Selection
In general, longan trees should be planted in full sun for best growth and fruit production. Select a part of the landscape away from other trees, buildings and structures, and powerlines. Remember longan trees can become very large if not pruned to contain their size. Select the warmest area of the landscape that does not flood (or remain wet) after typical summer rainfall events.
Planting in Sandy Soil
Many areas in Florida have sandy soil. Remove a 3 to 10 ft (0.9-3.1 m) diameter ring of grass sod. Dig a hole 3 to 4 times the diameter and 3 times a deep as the container the longan tree has come in. Making a large hole loosens the soil adjacent to the new tree making it easy for the roots to expand into the adjacent soil. It is not necessary to apply fertilizer, topsoil, or compost to the hole. In fact, placing topsoil or compost in the hole first and then planting on top of it is not desirable. If you wish to add topsoil or compost to the native soil, mix it with the soil excavated from making the hole in no more than a 50-50 ratio.
Backfill the hole with some of the native soil removed to make the hole. Remove the tree from the container and place it in the hole so that the top of the soil media in the container is level with or slightly above the surrounding soil level. Fill soil in around the tree roots and tamp slightly to remove air pockets. Immediately water the soil around the tree and tree roots. Staking the tree with a wooden or bamboo stake is optional. However, do not use wire or nylon rope to tie the tree to the stake as they may eventually damage the tree trunk as it grows. Use a cotton or natural fiber string that will degrade slowly.
Planting in Rockland Soil
Many areas in Miami-Dade County have a very shallow soil and several inches below the soil surface is a hard calcareous bedrock. Remove a 3 to 10 ft (0.9-3.1 m) diameter ring of grass sod. Make a hole 3 to 4 times the diameter and 3 times a deep as the container the longan tree has come in. To dig a hole there are several options use a pick and digging bar to break up the rock or contract with a company that has augering equipment or a backhoe. Plant as described in the previous section.
Planting on a Mound
Many areas in Florida are within 7 ft or so of the water table and experience occasional flooding after heavy rainfall events. To improve plant survival consider planting fruit trees on a 2 to 3 ft (0.6-0.9 m) (1.2-3.1 m) high by 4 to 10 ft diameter mound of native soil.
After the mound is made, dig a hole 3 to 4 times the diameter and 3 times a deep as the container the longan tree has come in. In areas where the bedrock nearly comes to the surface (rockland soil) follow the recommendations for the previous section. In areas with sandy soil follow the recommendations from the section on planting in sandy soil.
Care of Longan Trees in the Home Landscape
A calendar outlining the month-to-month cultural practices for longan is shown in Table 2.
Fertilizer
A month after planting spread 1/4 lb (113 g) per tree of a young tree fertilizer, such as 6-6-6 (% nitrogen-% phosphate-% potassium) with minor elements with 20 to 30% of the nitrogen from organic sources. Repeat this every 6 to 8 weeks for the first year. Then, gradually increase the amount of fertilizer to 0.5, 0.75, 1.0 lb etc., (227 g, 341 g, 454 g, etc.) as the trees grow. Four to 6 dry fertilizer applications per year may be made up to the third year (Table 3).
A foliar fertilizer mix composed of minor nutrients (manganese, zinc, boron, and molybdenum) and magnesium may be applied 4 to 6 times per tree per year any time from April to September. For trees in acid to neutral soils apply iron sulfate at 0.25 to 1 oz per tree to the soil 2 to 4 timers per year. In alkaline soils with a high pH, drench the soil with iron chelate 2 to 3 times per year from June through September. To make a soil drench, mix 0.5 to 0.75 oz (14-21 g) of iron chelate with 4 to 5 gallons (14-19 liters) of water and pour on to the soil adjacent to the tree trunk.
For mature trees, 2.5 to 5.0 lbs of fertilizer per application 2 to 3 times per year is recommended. The fertilizer should be applied just prior or at bloom, perhaps during late spring, and again just before or at harvest. The fertilizer mix should also include phosphate (P2O5) and potash (K2O); use a 6-6-6, 8-3-9 or similar material.
Irrigation (Watering)
Young trees should be irrigated regularly to facilitate tree establishment and growth. Once trees begin to bear (3 to 4 years after planting), trees should be irrigated regularly from flowering through harvest. Research from other regions has suggested that mild drought stress during the fall (September or October) and early winter enhances flowering in late winter or early spring.
Insect Pests
Longans have a few insect problems in south Florida. The most common pests are the lychee webworm and several scale insects. The lychee webworm (Crocidosema new species) attacks emerging shoots and panicles, flowers and young fruit and if left uncontrolled drastically reduce fruit set and crop yields. Scales include the banana shaped (Coccus acutissimus) and barnacle (Ceroplastes spp.) scales, which attack mostly the underside of leaves and the philephedra scale (Phillephedra tuberculosa) that attacks leaves and fruit. Adult citrus blue-green weevil (Pachnaeus litus), little leaf notcher (Artipus floridanus) and diaprepes weevil (Diaprepes abbreviatus) feed on leaves and their larvae feed on roots. They are mostly a problem in marl and sandy soils. Please contact your local County Cooperative Extension Service for current control recommendations.
Diseases
There are no major disease problems of longan at the present time. Red alga (Cephaleuros virescens) attacks limbs and shoots and is most prevalent during high humidity, warm, rainy weather. Symptoms include dark gray to reddish-rust colored patches or spots on bark and/or leaves. In severe infections, leaf drop and stem die back occur. Parasitic lichen (Strigula sp.) may parasitize leaves. Symptoms include white star-shaped spots on leaf surfaces. This lichen colonizes leaves reducing their ability to photosynthesize. Please contact your local County Cooperative Extension Service for current control recommendations.
Weeds
Weeds compete for water and nutrients and will slow tree establishment. Prior to planting trees, remove sod from the area the tree is to be planted in. Grass and weeds should be kept away from the tree trunk. Placing a 2 to 4 inch (5-10 cm) thick layer of mulch will suppress weed and grass growth and hold soil moisture.
Other Pests
Birds such as boat-tailed crackles (Cássidix mexicánus) and monk parakeets (Myiopsitta monachus) may feed on the fruit. Bagging the fruit in paper bags and netting may be used to exclude these birds if they become a major problem.
Longan Trees and Lawn Care
Longan trees in the home landscape are susceptible to trunk injury caused by lawn mowers and weed eaters. Maintain a grass-free area 2 to 5 or more away from the trunk of the tree. Never hit the tree trunk with lawn mowing equipment and never use a weed eater near the tree trunk. Mechanical damage to the trunk of the tree will result in weakening the tree and if severe enough can cause the tree to dieback or die.
Roots of mature longan trees spread beyond the drip-line of the tree canopy and heavy fertilization of the lawn adjacent to longan tree is not recommended and may reduce fruiting and or fruit quality. The use of lawn sprinkler systems on a timer may result in over watering and cause longan tree to decline. This is because too much water, too often is being applied which results in root rot.
Mulch
Mulching longan trees in the home landscape helps retain soil moisture, reduces weed problems adjacent to the tree trunk, and improves the soil near the surface. Mulch with a 2 to 6 inch (5-15 cm) layer of bark, wood chips, or similar mulch material. Keep mulch 8 to 12 inches (20-30 cm) from the trunk.
Tree Training and Pruning
Young Trees
Young longan trees are usually not trained in south Florida. However, young longan trees typically produce 2 to 5 long branches; making a scraggly tree structure with few terminals. However, several techniques will improve tree structure and bearing surface area. At planting or soon afterward, remove limbs with a narrow crotch angle. To force new shoot growth and increase the number of new shoots either bend long upright limbs to a horizontal position by tying or head back upright limbs. Shoot tip removal (removing 1-2 inches of the end of new shoots), once or twice during spring and summer will increase branching and make the tree more compact.
Mature Trees
Tree size control is done to facilitate spraying and picking and to maintain high light levels from the bottom to the top of the tree. It also greatly reduces the potential damage sustained due to hurricanes and strong winds. As trees mature, most of the pruning is done to control tree size (height and width), and to maintain production of the lower tree canopy and light on all sides of the canopy.
Longan trees in the home landscape may be pruned by hand or with gas/oil or electrical cutting tools by selectively thinning out a few moderate and small sized limbs each year. Trees kept 10 to 15 ft high (3.1-4.6 m) and 15 to 30 ft (4.6-9.1 m) wide are easier to care for and pick. They are also less likely to topple during strong winds. If the canopy of the tree becomes too dense, selective removal of some branches will increase air circulation and light penetration.
Fruit Thinning
Longan fruit thining. Fig. 6. Longan fruit thinning.
Credits: Ian Maguire/UF/IFAS/TREC
Longan fruit thining. Fig. 7. Longan fruit thinning – placement of the pruning cut.
Credits: Ian Maguire UF/IFAS/TREC
Longan fruit thining. Fig. 8.
Credits: Ian Maguire UF/IFAS/TREC
Longan fruit set varies greatly among trees and years. In some years, individual longan panicles set in excess of 300 fruit. However, panicles with 150 or more fruit usually produce small fruit. Removing about 50% of the set fruit during the spring usually results in a large increase in fruit size. Thinning is best done when fruit are ¼ to ½ inches (6-12 mm) in diameter and consists of removing one half to two-thirds of the distal (terminal) end of each panicle.
Harvest, Ripening, and Storage
The longan harvest season in south Florida is from the middle of July to early September but is mainly in August. At maturity, the fruit will be an intense tan color. The main ripeness indicator is pulp sweetness; this occurs before removing the fruit from the tree. Fruit that is 1¼ inches (32 mm) or greater in diameter with good flavor is most desirable. Once removed from the tree, the fruit will not increase in sweetness.
Fruit is harvested by hand, with pruning shears or a pole with a cutter that holds the entire cluster. Usually, a portion of the branch behind the fruit-bearing panicle (about 1 ft; 30 cm) is cut. Harvested fruit should be placed in the shade immediately and then cooled as soon as possible. Longan fruit have a relatively short shelf life when stored at ambient temperatures of 75-85oF (24-29oC). Fruit harvested at home may be placed in plastic bags and kept in the refrigerator for 5 to 7 days.
Uses and Nutritional Value
Longan trees make excellent specimen or shade trees and enhance the landscape with their dark-green foliage. Longans produced in south Florida are consumed fresh or are frozen for later consumption. Fruit may be frozen whole in polyethylene bags or air-tight containers. In other producing countries fruit are dried and canned. This helps to popularize the fruit by extending the normally very short season. The fruit is a good source of potassium and low in calories (Table 4).
**** en.wikipedia.org/wiki/Longan
Broomweed, Mithi Pathi, Licorice weed, Zhu zai cao, Scoparia dulcis ….Cam Thảo Nam, Cam Thảo đất ….#1
Image by Vietnam Plants & The USA. plants
Chụp hình ngày 15-9-2010 tại thành phố Hồ chí Minh ( Saigon ) , miền Nam Việt Nam.
Taken on September 15, 2012 in Ho chi Minh city, Southern of Vietnam.
Vietnamese named : Cam Thảo Nam, Cam Thảo đất,
Common names : Licorice weed , Zhu zai cao (Chin.),Sweetbroom (Engl.), Broomweed (Engl.), Escobilla amarga (Sp.), Silhigop (Bis.) , Mala-anis (Pamp.) , Saang-kabayo (Tag.), Tachin-karnero (Iv.), Mithi Patti ( Hindu ).
Scientist name : Scoparia dulcis L.
Synonyms :
FamilyScrophulariaceae – Figwort family
Group : Dicot
Duration : Annual – Perennial
Growth Habit : Forb/herb – Subshrub
Kingdom : Plantae – Plants
Subkingdom : Tracheobionta – Vascular plants
Superdivision : Spermatophyta – Seed plants
Division : Magnoliophyta – Flowering plants
Class : Magnoliopsida – Dicotyledons
Subclass : Asteridae
Order : Scrophulariales
Genus : Scoparia L. – licorice weed
Species : Scoparia dulcis L. – licorice weed
**** www.uphcm.edu.vn/caythuoc/index.php?q=node/223 : NHẤP VÀO LINK ĐỂ ĐỌC THÊM, RẤT CẢM ƠN.
Phân bố, sinh học và sinh thái:
Gốc ở nhiệt đới Châu Mỹ, được thuần hóa trong tất cả các vùng nhiệt đới của thế giới. Ở nước ta, cây mọc khắp nơi từ Bắc vào Nam. Thường gặp trên đất hoang, dọc bờ đường, trên các dải cát của các sông và trong các ruộng khô, ở vùng thấp.
Bộ phận dùng:
Toàn cây (Herba Scopariae)
Thành phần hóa học:
Cây chứa alkaloid và một chất đắng; còn có chứa nhiều acid silicic và một hoạt chất gọi là amellin. Phần trên mặt đất có chứa một chất dầu sền sệt mà trong thành phần có dulciol, scopariol, (+)manitol, glucose. Rễ chứa (+)manitol, tannin, alkaloid, triterpenoids: friedelin, glutinol-a-amarin, acid betulinic, acid dulcinic, acid iflaionic, scoparic A, B, C, D scopadulcic (A: R = COOH, R’ = CH2OH; B: R = Me, R’ = COOH).
Tác dụng dược lý – Công dụng:
Thường dùng trị: cảm cúm, sốt, nóng nhiều, ho khan, ho có đàm. Lỵ trực trùng. Tê phù, phù thủng, giảm niệu. Dùng ngoài, ép lấy dịch từ cây tươi trị mụn nhọt, lở ngứa, eczema. Hoạt chất amellin dùng điều trị bệnh đái đường, thiếu máu, albumin niệu, ceton niệu, viêm võng mạc, những biến chứng kèm theo đái đường và làm các vết thương mau lành. Rễ trị đau bụng, kiết, lợi tiểu; thân trị ho, sốt, giải độc, trị kinh nguyệt nhiều hay đau, giúp sinh dễ; lá bổ, làm cường tráng dục tính, trị sạn, trị viêm phế quản.
**** caythuoc.chothuoc24h.com/cay-thuoc/C/1695/
Cam thảo đất, Cam thảo nam – Scoparia dulcis L., thuộc họ Hoa mõm sói – Scrophulariaceae.
Mô tả: Cây thảo mọc thẳng đứng, cao 30-80cm, có thân nhẵn hoá gỗ ở gốc và rễ to hình trụ. Lá đơn mọc đối hay mọc vòng ba lá một, phiến lá hình mác hay hình trứng có ít răng cưa ở nửa trên, không lông. Hoa nhỏ, màu trắng, mọc riêng lẻ hay thành từng đôi ở nách lá. Quả nang nhỏ chứa nhiều hạt.
Ra hoa quả vào tháng 5-7.
Bộ phận dùng: Toàn cây – Herba Scopariae.
Nơi sống và thu hái: Loài liên nhiệt đới mọc khắp nơi ở đất hoang ven các đường đi, bờ ruộng. Có thể trồng bằng hạt vào mùa xuân. Vào mùa xuân hè, thu hái toàn cây rửa sạch, thái nhỏ dùng tươi hoặc phơi hay sấy khô để dùng dần.
Thành phần hóa học: Cây chứa một alcaloid và một chất đắng; còn có nhiều acid silicic và một hoạt chất gọi là amellin. Phần cây trên mặt đất chứa một chất dầu sền sệt, mà trong thành phần có dulciol, scopariol, (+) manitol, glucose. Rễ chứa (+) manitol, tanin, alcaloid, một hợp chất triterpen. Vỏ rễ chứa hexcoxinol, b-sitosterol và (+) manitol.
Tính vị, tác dụng: Cam thảo đất có vị ngọt, tính mát; có tác dụng bổ tỳ, nhuận phế, thanh nhiệt, giải độc và lợi tiểu.
Amellin trong cây là một chất chống bệnh đái đường, dùng uống làm giảm đường – huyết và các triệu chứng của bệnh đái đường và tăng hồng cầu. Nó cũng ngăn cản sự tiêu hao mô và dẫn đến sự tiêu thụ tốt hơn protein trong chế độ ăn, làm giảm mỡ trong mô mỡ và thúc đẩy quá trình hàn liền vết thương.
Công dụng, chỉ định và phối hợp: Thường dùng trị: 1. Cảm cúm, sốt, nóng nhiều, ho khan, ho có đờm; 2. Lỵ trực tràng; 3. Tê phù, phù thũng, giảm niệu. Liều dùng 8-12g khô hoặc 20-40g tươi, dạng thuốc sắc. Để tươi chữa ho khan; sao thơm chữa ho đờm và tiêu sưng. Dùng ngoài, ép lấy dịch từ cây tươi trị mụn nhọt, lở ngứa, eczema.
Nước hãm lá Cam thảo đất dùng làm thuốc súc miệng và ngậm chữa đau răng. Hoạt chất amellin dùng điều trị bệnh đái đường, thiếu máu, albumin niệu, ceton niệu, viêm võng mạc, những biến chứng kèm theo đái đường và làm các vết thương mau lành.
Có thể dùng thay Cam thảo để chữa sốt, say sắn, giải độc cơ thể.
Đơn thuốc:
1. Lỵ trực trùng: Cam thảo đất, Rau má, lá Rau muống, Địa liền, mỗi vị 30g, sắc uống.
2. Cảm cúm, nóng ho: Cam thảo đất tươi 30g, Diếp cá 15g, Bạc hà 9g, sắc uống. Có thể phối hợp với Rau má, Cỏ tranh, Sài hồ nam, Mạn kinh, Kim ngân, Kinh giới.
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**** plants.usda.gov/java/profile?symbol=Scdu3
**** www.hort.purdue.edu/newcrop/cropfactsheets/scoparia.html
**** www.tropilab.com/sweet-broom.html
**** en.wikipedia.org/wiki/Scoparia_dulcis
**** ayurvedicmedicinalplants.com/index.php?option=com_zoom&am…
**** www.ncbi.nlm.nih.gov/pubmed/16595962
Chem Pharm Bull (Tokyo). 2006 Apr;54(4):546-9.
Chemical and biological evaluation on scopadulane-type diterpenoids from Scoparia dulcis of Vietnamese origin.
Phan MG, Phan TS, Matsunami K, Otsuka H.
Source
Faculty of Chemistry, College of Natural Science, Vietnam National University, Hanoi, Vietnam.
Abstract
From the aerial parts of Scoparia dulcis L. (Scrophulariaceae) grown in Vietnam, four scopadulane-type diterpenoids (4-7), of which 7 is new and was given the trivial name scopadulcic acid C, together with nine known compounds were isolated. Their structures were elucidated by spectroscopic analyses. The absolute configurations of 4-7 were ascertained by applying the modified Mosher’s method to iso-dulcinol (6). The isolation of the lignans nirtetralin and niranthin for the first time from S. dulcis is also of chemotaxonomic interest. The cytotoxic activity in KB cells, inhibitory effect on LPS/IFNgamma-induced NO production, inhibition of multidrug resistance (MDR), and antibacterial and antifungal activities of the scopadulane-type diterpenoids 4-7 were examined in this study.
PMID: 16595962 [PubMed - indexed for MEDLINE] Free full text
**** www.stuartxchange.org/Malaanis.html
Botany:
· Erect, much branched, smooth, herbaceous, or half-woody plant 25 to 80 cm in height.
· Leaves: opposite and whorled, lanceolate to elliptic or oblanceolate, 0.5 to 2 cm long, pointed at both ends and narrowed below the short stalk, and toothed in the margins.
· Flowers: while, small, very numerous, and in pairs; their stalks slender, and 1 cm long or less. Sepals 4 or 5, imbricate, corolla rotate, 4-fid, the throat bearded, lobes subequal, white stamens 4, subequal.
Distribution
Ubiquitouos weedIn throughout the settled areas in low to medium altitudes; along roadsides, sides of ditches, and other more or less shaded and moist places.
Parts utilized:
· Whole plant.
· Collected from April to June.
· Wash, cut into pieces, dry under the sun.
Properties and Constituents
• Sweet and has cooling nature.
• Considered antipyretic, diuretic, analgesic, antiinflammatory, antifungal, antibacterial,
• Considered by some as aphrodisiac.
Constituents
• Study yielded diterpenoids, flavonoids, tannins, alkaloids, triterpenes, hexaconasol, b-sitosterol, ketone, dulcitone and amellin.
• Triterpene and mannitol isolated from the roots; dulcitol from aerial parts. (Source)
• Phytochemical studies revealed acacetin, amellin, amyrin, apigenin, benzoxazin, benzoxalinone, betulinic acid, daucosterol, dulcidion . . among others. Also isolated were a flavone glycoside and a diterpene. (source)
Uses
Folkloric
· Cold and fever, enteritis, diarrhea, beriberi, edema, difficulty in urination: Use decoction of 15 to 30 gms dried material.
· Miliaria: Rub the squeezed juice from fresh plant.
· In India, China and Southeast Asia, used for pain, fever, dysentery, diarrhea, cough, bronchitis, hypertension, piles and insect bites.
· In Vietnam, used for snakebites and antidote for cassava intoxication. Also, for pimples, impetigo, ulcers and eczema.
· In India, used for gonorrhea, to induce labor, and diabetes.
· In China, used for herpes.
· In Burma and India, herb infusion used as mouthwash for infected gums.
· In Brazilian folk medicine, used for bronchitis, gastric disorders, hemorrhoids, insect bites, skin wounds..
Others
· In Trinidad’s santowah ceremony, sweetbroom is used to sprinkle holy water.
Studies
• Antioxidant: (1) Free Radical Scavenging Activity of Scoparia dulcis Extract: Study showed strong antioxidant acitivity corresponding to the reduction of hydroxyl radical generation, a possible rationale for the weeds observed therapeutic effects. (2) Study showed significant decrease in TBARS and hyperperoxides formation in the brain of rats suggesting a role in protection against lipid peroxidation induced membrane damage. Results suggest, in addition to its antidiabetic effect, SD possess antioxidant potential.
• Antihyperglycemic / Anti-Diabetes: (1)Effect of an aqueous extract of Scoparia dulcis on blood glucose, plasma insulin and some polyol pathway enzymes in experimental rat diabetes: Study showed SD was effective in attenuating hyperglycemia in rats, possibly due to the decreased influx of glucoxe into the polyol pathway with increased activities of antioxidant enzymes and plasma insulin and decreased activity of sorbitol dehydrogenase. (2) Study showed the aqueous extract of Scoparia dulcis exhibited antihyperglycemic effect by attenuating biochemical alterations in streptozotocin-induced diabetic rats.
• Cytoprotective / Insulin-Secretagogue Activity: Study showed significant decrease in blood glucose with significantly increased plasma insulin level with use of aqueous extract of S dulcis in STZ-induced diabetic rats. Other results showed its insulin secretagogue activity and protection against STZ-mediated cytotoxicity. The glucose lowering effect was associated with potentiation of insulin release from the pancreatic islets.
• Anti-Ulcer: Study showed water extracts of S dulcis showed dose-dependent inhibition of indomethacin-induced gastric damage in rats validating its use in traditional medicine as an antacid and anti-ulcer agent.
• Antioxidant: Protective role of Scoparia dulcis plant extract on brain antioxidant status and lipidperoxidation in STZ diabetic male Wistar rats. Study showed levels of peroxidation markers in the brain were significantly a role in protection against lipidperoxidation-induced membrane damage.
• Antimicrobial / Antifungal: Phytochemical and antimicrobial study of an antidiabetic plant: Scoparia dulcis L.: Study of isolated fractions showed significant antimicrobial and antifungal activity against all tested organisms – S typhii, S aureus, E coli, B subtilis, P aeruginosa, P vulgaris and fungal strains (C albicans, A niger and F oxysporum).
• Antitumor: Scopadulcic acid B (SDB), a tetracyclic diterpenoid isolated from S dulcis, inhibited the effects of a tumor promoter, inhibited phopholipid synthesis and suppressed the promoting effect of TPA on skin tumor formation. Its potency is stronger than other natural anti-tumor promoting terpenoids.
• Antihyperlipidemic: Effect of Scoparia dulcis (Sweet Broomweed) in Streptozotocin Diabetic Rats: Study showed antidiabetic and antihyperlipidemic activity in normal and experimental diabetic rats.
• NGF Activity: Acetylated Flavonoid Glycosides Potentiating NGF Action from Scoparia dulcis: Three new acetylated flavonoid glycosides were isolated, two of which showed enhancing activity of nerve growth factor-mediated neurite outgrowth.
• Cytotoxicity: Study isolated four new diterpenes. Crude extracts and pure diterpenes suggested cytotoxicty.
• Beta-glucoronidase Inhibitor: Study isolated three labdane-type diterpene acids: scoparic acid A, B and C. Scoporic acid A was found to be a potent beta-glucoronidase inhibitor.
• Hepatoprotective / Antioxidant: Study isolated showed the hydroalcoholic extract of S dulcis exhibits significant hepatoprotective activity against carbon tetrachloride-induced liver damage in rats, an activity attributed to free radical scavenging activity.
• Anti-Trypanosomal Immunosuppression / Immunological Boosting: Previous findings suggest T. brucei is immunosuppressive. Study showed Scoparia dulcis provides a measure of immunological boost during experimental T. brucei infection in rabbits.
• Sympathomimetic Effects / Catecholamines: Study yielded both noradrenaline and adrenaline in the plant extract. The catecholamines may be responsible for the hypertensive and inotropic effects after parenteral administration of S dulcis extracts.
• Anti-Urolithiasis: Study investigating the inhibition of calcium oxalate, calcium phosphate and calcium carbonate mineralization by five medicinal plants – A aspera, P leschenaultii, S amplexicaulis, Scoparia dulcis and A lanata – showed that increased intake of the fruit juices and seed extracts of the test plants would be helpful in urinary stone prophylaxis. The sequestering of the insoluble calcium salts by the fruit juices may be due to single or mixed ligand chelation by the hydroxyl acids present in them.
• Anti-Inflammatory / Analgesic: Study results indicate that the extract of S dulcis possess analgesic effects probably related to its antiinflammatory activity, effects probably attributable to the presence of glutinol and flavonoids.
Availability
Wild-crafted.
Powders, extracts in the cybermarket.
**** www.ncbi.nlm.nih.gov/pubmed/15549711
J Biochem Mol Toxicol. 2004;18(5):261-72.
Scoparia dulcis, a traditional antidiabetic plant, protects against streptozotocin induced oxidative stress and apoptosis in vitro and in vivo.
Latha M, Pari L, Sitasawad S, Bhonde R.
Source
Department of Biochemistry, Faculty of Science, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India.
Abstract
Oxidative stress is implicated in the pathogenesis of diabetic complications. The experiments were performed on normal and experimental male Wistar rats treated with Scoparia dulcis plant extract (SPEt). The effect of SPEt was tested on streptozotocin (STZ) treated Rat insulinoma cell lines (RINm5F cells) and isolated islets in vitro. Administration of an aqueous extract of Scoparia dulcis by intragastric intubation (po) at a dose of 200 mg/kg body weight significantly decreased the blood glucose and lipid peroxidative marker thiobarbituric acid reactive substances (TBARS) with significant increase in the activities of plasma insulin, pancreatic superoxide dismutase (SOD), catalase (CAT), and reduced glutathione (GSH) in streptozotocin diabetic rats at the end of 15 days treatment. Streptozotocin at a dose of 10 mug/mL evoked 6-fold stimulation of insulin secretion from isolated islets indicating its insulin secretagogue activity. The extract markedly reduced the STZ-induced lipidperoxidation in RINm5F cells. Further, SPEt protected STZ-mediated cytotoxicity and nitric oxide (NO) production in RINm5F cells. Treatment of RINm5F cells with 5 mM STZ and 10 mug of SPEt completely abrogated apoptosis induced by STZ, suggesting the involvement of oxidative stress. Flow cytometric assessment on the level of intracellular peroxides using fluorescent probe 2’7′-dichlorofluorescein diacetate (DCF-DA) confirmed that STZ (46%) induced an intracellular oxidative stress in RINm5F cells, which was suppressed by SPEt (21%). In addition, SPEt also reduced (33%) the STZ-induced apoptosis (72%) in RINm5F cells indicating the mode of protection of SPEt on RIN m5Fcells, islets, and pancreatic beta-cell mass (histopathological observations). Present study thus confirms antihyperglycemic effect of SPEt and also demonstrated the consistently strong antioxidant properties of Scoparia dulcis used in the traditional medicine.
(c) 2004 Wiley Periodicals, Inc.
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