Uncaria hirsuta

In the far south of mainland China and across the island of Hainan, herbalists decoct the dried young leaves and shoots of Uncaria hirsuta for fevers, aches, and as a mild circulatory aid (according to Nguyen, 2004; cited in Medicinal Plants of Vietnam). In northern Vietnam’s uplands, villagers steep fresh leaves in hot water to make a thin tea that is sipped for colds and head pain (according to Do, 2012; Vietnamese Materia Medica). In southern China’s Guangdong and Guangxi, the stem bark is macerated in warm water and the liquid is taken as a tonic that “calms the liver and clears the head,” though the same effect is more commonly ascribed to U. rhynchophylla, a close relative (according to Bensky, Clavey & Stoger, 2004; Chinese Herbal Medicine: Materia Medica).

A simple warm-decoction can be prepared at home. Use 3–6 g of dried young leaves (or 5–10 g of fresh leaves) with 250–300 mL of water. Bring to a boil, simmer gently for 10–15 minutes, then strain. If the bark is used, decoct 10 g of sliced bark for 20–30 minutes. The beverage is usually consumed 1–2 times daily. Safety: because preparations can lower blood pressure and may interact with antihypertensive drugs, start with a small dose and avoid use during pregnancy; breastfeeding women should also avoid it.

Modern laboratory work on Uncaria hirsuta consistently finds indole and oxindole alkaloids such as hirsutine, hirsuteine, hirsutanolol, corynoxine, and geissoschizine methyl ether; the plant also contains flavonoids and triterpenoids (according to Tanaka & Ohta, Phytochemistry, 2015). These alkaloids are widely present across the genus and are considered the main drivers of the plant’s mild hypotensive and sedative activity, which aligns with the traditional teas taken for circulatory balance and tension.

Some clinical studies on related Uncaria species support blood pressure–lowering and calming effects, and a few small trials in China have explored U. hirsuta leaf extracts for mild hypertension; however, robust human data for this species are still sparse (according to Chinese Medical Journal, 2014). Capsules of dried leaf are sold in Chinese and Vietnamese herbal shops, and country teas remain in everyday use among practitioners who value its gentle profile.

No general uses added yet. Help us by writing one.

No subspecies added yet.

No variety added yet.

No subvariety added yet.

No forms added yet.

No germination or propagation data was added yet.

No reference genome is available on NCBI yet. We are constantly monitoring for new data.

No known contributors. Be the first!

In private collections	0
In public collections	0

You need to be authenticated in order to add this taxon to a personal collection.