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Astragalus membranaceus - (Fisch. ex Link.)Bunge.

Huang Qi

Author	(Fisch. ex Link.)Bunge.	Botanical references	238, 266
Family	Leguminosae	Genus	Astragalus
Synonyms	Astragalus mongholicus dahuricus - (DC.)Podlech. Astragalus penduliflorus membranaceus - Glehn.
Known Hazards	Many members of this genus contain toxic glycosides[65]. All species with edible seedpods can be distinguished by their fleshy round or oval seedpod that looks somewhat like a greengage[85]. A number of species can also accumulate toxic levels of selenium when grown in soils that are relatively rich in that element[65].
Range	E. Asia - China, Mongolia and Siberia.
Habitat	Dry sandy soils[238]. Mountain thickets[279]. Steppes, meadows, xerophytic shrubs, coniferous forests; montane belt at altitudes of 800 - 2000 metres[266].
Edibility Rating	0 (1-5)	Medicinal Rating	5 (1-5)

Physical Characteristics

Perennial growing to 0.3m by 0.3m.

The plant prefers light (sandy) and medium (loamy) soils and requires well-drained soil. The plant prefers neutral and basic (alkaline) soils. It cannot grow in the shade. It requires dry soil.

Habitats

Cultivated Beds;

Edible Uses

None known

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.

Adaptogen; Antibacterial; Cancer; Cardiotonic; Diuretic; Febrifuge; Hypoglycaemic; Hypotensive; Pectoral; Tonic; Uterine tonic; Vasodilator.

Huang Qi is commonly used in Chinese herbalism, where it is considered to be one of the 50 fundamental herbs[218]. The root is a sweet tonic herb that stimulates the immune system and many organs of the body, whilst lowering blood pressure and blood sugar levels[238]. It is particularly suited to young, physically active people, increasing stamina and endurance and improving resistance to the cold - indeed for younger people it is perhaps superior to ginseng in this respect[254]. Huang Qi is used especially for treatment of the kidneys and also to avoid senility[218]. The plant is often used in conjunction with other herbs such as Atractylodes macrocephala and Ledebouriella seseloides[238]. The root contains a number of bio-active constituents including saponins and isoflavonoids[279]. It is adaptogen, antipyretic, diuretic, tonic, uterine stimulant and vasodilator[218, 254, 279]. It is used in the treatment of cancer, prolapse of the uterus or anus, abscesses and chronic ulcers, chronic nephritis with oedema and proteinuria[176, 218]. Recent research in the West has shown that the root can increase the production of interferon and macrophages and thus help restore normal immune function in cancer patients[254, 279]. Patients undergoing chemotherapy or radiotherapy recover faster and live longer if given Huang Qi concurrently[254]. The root of 4 year old plants is harvested in the autumn and dried for later use[238, 254]. The plant is antipyretic, diuretic, pectoral and tonic[218]. Extracts of the plant are bactericidal, hypoglycaemic and hypotensive[218]. Cardiotonic, vasodilator[176].

Other Uses

None known

Cultivation details

Requires a dry well-drained soil in a sunny position[1]. Prefers a sandy slightly alkaline soil[238]. Plants are hardy to at least -15°c[238]. There is some disagreement over the correct name for this species, with several authorities seeing it as part of A. penduliflorus[261]. The Flora of China treats it as a sub-species of A. mongholicus, as A. mongholicus dahurica[266]. Plants are intolerant of root disturbance and are best planted in their final positions whilst still small[200]. This species has a symbiotic relationship with certain soil bacteria, these bacteria form nodules on the roots and fix atmospheric nitrogen. Some of this nitrogen is utilized by the growing plant but some can also be used by other plants growing nearby[200]. Many members of this genus can be difficult to grow, this may be due partly to a lack of their specific bacterial associations in the soil[200].

Propagation

Seed - best sown as soon as it is ripe in a cold frame[200]. A period of cold stratification may help stored seed to germinate[200]. Stored seed, and perhaps also fresh seed, should be pre-soaked for 24 hours in hot water before sowing - but make sure that you do not cook the seed[134, 200]. Any seed that does not swell should be carefully pricked with a needle, taking care not to damage the embryo, and re-soaked for a further 24 hours[134, 200]. Germination can be slow and erratic but is usually within 4 - 9 weeks or more at 13°c if the seed is treated or sown fresh[134]. As soon as it is large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for their first winter, planting them out into their permanent positions in late spring or early summer, after the last expected frosts.

Links

References

[1] F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press 1951
Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaces in 1992 by a new dictionary (see [200]).

[65] Frohne. D. and Pfänder. J. A Colour Atlas of Poisonous Plants. Wolfe 1984 ISBN 0723408394
Brilliant. Goes into technical details but in a very readable way. The best work on the subject that I've come across so far.

[85] Harrington. H. D. Edible Native Plants of the Rocky Mountains. University of New Mexico Press 1967 ISBN 0-8623-0343-9
A superb book. Very readable, it gives the results of the authors experiments with native edible plants.

[134] Rice. G. (Editor) Growing from Seed. Volume 2. Thompson and Morgan. 1988
Very readable magazine with lots of information on propagation. An interesting article on Ensete ventricosum.

[176] Yeung. Him-Che. Handbook of Chinese Herbs and Formulas. Institute of Chinese Medicine, Los Angeles 1985
An excellent Chinese herbal giving information on over 500 species. Rather technical and probably best suited to the more accomplished user of herbs.

[200] Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992 ISBN 0-333-47494-5
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.

[218] Duke. J. A. and Ayensu. E. S. Medicinal Plants of China Reference Publications, Inc. 1985 ISBN 0-917256-20-4
Details of over 1,200 medicinal plants of China and brief details of their uses. Often includes an analysis, or at least a list of constituents. Heavy going if you are not into the subject.

[238] Bown. D. Encyclopaedia of Herbs and their Uses. Dorling Kindersley, London. 1995 ISBN 0-7513-020-31
A very well presented and informative book on herbs from around the globe. Plenty in it for both the casual reader and the serious student. Just one main quibble is the silly way of having two separate entries for each plant.

[254] Chevallier. A. The Encyclopedia of Medicinal Plants Dorling Kindersley. London 1996 ISBN 9-780751-303148
An excellent guide to over 500 of the more well known medicinal herbs from around the world.

[261] Yakovlev. G. Sytin. A. & Roskov. Yu. Legumes of Northern Eurasia Royal Botanic gardens, Kew. 1996 ISBN 0-947643-97-4
For the academic only, a list of species growing in N. Eurasia with terse details on habitat, range, uses etc.

[266] Flora of China 1994
On-line version of the Flora - an excellent resource giving basic info on habitat and some uses.

[279] Medicinal Plants in the Republic of Korea World Health Organisation, Manila 1998 ISBN 92 9061 120 0
An excellent book with terse details about the medicinal uses of the plants with references to scientific trials. All plants are described, illustrated and brief details of habitats given.

Readers Comments

Plants for a Future does not verify the accuracy of reader comments, use at your own risk. In particular Plants For A Future can not take any responsibility for any adverse effects from the use of plants. You should always consult a professional before using plants medicinally.

Astragalus membranaceus

ayed Mon Feb 4 2008

please what is the active constituent,it's structur, please send me more information about this plant becase that treat cancer

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