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Botanical Name: Astragalus complanatus
Synonyms: Sha Yuan Zi, Flatstem Milkvetch Seed, Flatstem Tribulus
Common Names: Bei Bian Huang Qi
Habitat: Astragalus complanatus is native to East Asia – China. It grows on dry slopes, meadows and gravelly soils at elevations of 1000-2400 metres in Gansu, Hebei, Heilongjiang, Henan, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shanxi, W Sichuan, Yunnan.
Astragali Complanati Perennial herb of Leguminosae family,Height 30~100cm. Root thick and long,stem weak and slim,little flat,small white pubes growing at stem root.Feather like leaves grows intercross,small leaves 9~21,egg shape,long 0.7~2 cm,width 3~8 cm,margin slight concave.flower 3~9,flower bud white soft hair surfaced,flower yellow color,bloosom during july to september,fruiting september to october.
It is in flower from Jul to September, and the seeds ripen from Aug to October. Seed is flat shaped kidney,2~2.5mm length,thick 1 mm,colored brown green or pale brown.
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The flowers are hermaphrodite (have both male and female organs) and are pollinated by Bees, lepidoptera.It can fix Nitrogen.
Suitable for: light (sandy) and medium (loamy) soils and prefers well-drained soil. Suitable pH: acid, neutral and basic (alkaline) soils. It cannot grow in the shade. It prefers dry or moist soil.
We have very little information on this species and do not know if it will be hardy in Britain, though judging by its native range it should succeed outdoors in many parts of this country. The following notes are based on the general needs of the genus. Requires a dry well-drained soil in a sunny position. Plants are intolerant of root disturbance and are best planted in their final positions whilst still small. 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. 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.
Seed – best sown as soon as it is ripe in a cold frame. A period of cold stratification may help stored seed to germinate. 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. 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. 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. 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.
This species has been used for almost 2,000 years in China as a liver and kidney tonic. The seed is hepatic and ophthalmic. It is used in the treatment of kidney diseases, lumbago, spontaneous seminal emissions, frequent micturation, vertigo and decreased sight.
Known Hazards: Many members of this genus contain toxic glycosides. All species with edible seedpods can be distinguished by their fleshy round or oval seedpod that looks somewhat like a greengage. A number of species can also accumulate toxic levels of selenium when grown in soils that are relatively rich in that element.
Disclaimer : The information presented herein is intended for educational purposes only. Individual results may vary, and before using any supplement, it is always advisable to consult with your own health care provider.