Corydalis yanhusuo - (Y.H.Chou&Chun.C.Hsu.)W.T.Wang.
Common Name Yan Hu Suo
Family Papaveraceae
USDA hardiness Coming soon
Known Hazards Although no specific mention has been seen for this species, there is a report that Corydalis species are potentially toxic in moderate doses[222].
Habitats Not known
Range E. Asia - China.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Moist Soil Semi-shade Full sun

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Corydalis yanhusuo Yan Hu Suo

Corydalis yanhusuo Yan Hu Suo
Physical Characteristics
Corydalis yanhusuo is a PERENNIAL. The flowers are hermaphrodite (have both male and female organs)Suitable for: light (sandy) and medium (loamy) soils and prefers well-drained soil. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.


Woodland Garden Dappled Shade; Shady Edge;
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.

Analgesic;  Antiseptic;  Antispasmodic;  Antitussive;  Cancer;  Cardiotonic;  Hypotensive;  Sedative.

Yan Hu Suo is an important Chinese remedy that has been used for hundreds of years to help 'invigorate the blood' and relieve almost any painful condition[254]. It is used especially to relieve menstrual cramps, chest and abdominal pains[254]. The plant contains powerful alkaloids that are responsible for this effect[254]. The root is analgesic, antiseptic, antispasmodic and sedative[176, 218]. It has traditionally been used to lower pain and strengthen the circulation[218]. It is used in the treatment of a wide range of ailments including lumbago, dysmenorrhoea, hernia, chest pains, insomnia and traumatic injuries[176, 218]. The root is harvested in late spring or early summer, once the top growth has died down, and is dried for later use[254]. Various extracts from the plant have shown antitussive, cardiotonic, hypotensive and anticancer activity[218].


Other Uses
None known
Cultivation details
We have very little information on this species and do not know if it will be hardy in Britain. The following notes are based on the general needs of the genus. Prefers a moist, well-drained rather light soil, thriving in semi-shade[1]. Grows well in a woodland garden or peat bed. Plants seem to be immune to the predations of rabbits[233].
Seed - best sown as soon as it is ripe, the seed rapidly loses viability if it is allowed to become dry[129]. Surface sow and keep moist, it usually germinates in 1 - 3 months at 15°c[164]. Germinates in spring according to another report[129]. Two months warm, then a cold stratification improves the germination of stored seed[134, 164]. Sow the seed thinly so that the seedlings can be allowed to grow undisturbed in the pot for their first year. Apply liquid feed at intervals during their growing season to ensure they are well fed. The seedlings only produce one leaf in their first year of growth[175] and are very prone to damping off[129]. Divide the seedlings into individual pots once they have become dormant and grow them on in a partially shaded area of a greenhouse for at least another year. Plant them out into their permanent positions when they are dormant. Division after flowering.
Other Names
Found In
Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status
IUCN Red List of Threatened Plants Status :
Related Plants


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Botanical References
Links / References
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Readers comment
Ric Quinn   Sun Apr 12 2009
Can you give me an address of someone who sells corydalis Yanhusuo seeds for growing. Thank you Regards..Ric Quinn
Pauli Virtanen   Sun Nov 1 2009
Influence on hepatitis B or on the or other viral diseases. the effect of boosters provoked by using electron transfer when alkaloids are isolated from origin material. Comparison of alkloids from Enantia clortantha to Corydalis alkaloids, which seems to be very similar. Indeed the applications of Prof. Marcus findings to alkaloid Chemistry et.cetera. pharmaceutical phytopchemistry. Pl. see my abstract in IDDST Shanghai congress abstract book page 134, year 2009.
recent online article Background Current pain management is limited, in particular, with regard to chronic pain. In an attempt to discover novel analgesics, we combined the approach developed to characterize traditional Chinese medicine (TCM), as part of the “herbalome” project, with the reverse pharmacology approach aimed at discovering new endogenous transmitters and hormones.   Jan 9 2014 12:00AM
Zhang, Yan et al 2014 A Novel Analgesic Isolated from a Traditional Chinese Medicine. Current Biology (online) covers dehydrocorybulbine (DHCB) effective in heat-induced acute pain, inflammatory pain and injury-induced neuropathic pain.
Current Biology
   Mar 23 2016 12:00AM
YanHu Suo is very useful for chronic pain management and it is able to replace opioids for low level analgesic requirements, and as an addition in small dosage to other analgesics for sedation as required during pain management.
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Subject : Corydalis yanhusuo  

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