(Rubiaceae) Uncaria macrophylla Wall.

Local name(s): ໜາມ ຂໍ (nam koh)

Medicinal use(s): Rheumatism

Part(s) used: Stem, thorn

Field Characters: Liana. Leaf Petiole 3-6 mm, pilosulous, opposite, blade ovate or elliptic-oblong. Inflorescence axillary and often in terminal groups of 5-7 heads, densely populous to tomentose.Flowers sessile. Calyx with hypanthium portion obconic. Fruits are sessile, obovoid to oblanceolate.

Locality: Khammouane Province; Nyomalat District; Thongkong Village, roud side of Route to MBP.

Habitat: On the road side to Thongkong MBP 

Altitude: 122 m asl 

Collector(s): O. Souliya, K. Phoulivong, D. Makiem and S. Phimmavong 

Collection number(s): Onevilay_YML_051

Collection Date: July 22, 2025

Additional information:  

Synonyms, images, taxonomic description: 

Medicinal properties:

Cao R, Wang Y, Zhou Y, et al. Advanced researches of traditional uses, phytochemistry, pharmacology, and toxicology of medical Uncariae Ramulus Cum Uncis. J Ethnopharmacol 2024, 325:117848.  DOI: 10.1016/j.jep.2024.117848

Kushida H, Matsumoto T, Ikarashi Y.(2021) Properties, Pharmacology, and Pharmacokinetics of Active Indole and Oxindole Alkaloids in Uncaria Hook. Front. Pharmacol 2021, 12:688670.  https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2021.688670/full 

Qin N, Lu X, Liu Y, et al. Recent research progress of Uncaria spp. based on alkaloids: phytochemistry, pharmacology and structural chemistry. European Journal of Medicinal Chemistry 2021, volume 210, 112960. https://doi.org/10.1016/j.ejmech.2020.112960. 

Kou Wang K, Zhou X-Y, Wang YY, et al. Macrophyllionium and Macrophyllines A and B, Oxindole Alkaloids from Uncaria macrophylla. J Nat Prod 2011, 74, 1, 12–15.  https://doi.org/10.1021/np1004938 

Zhang Q, Zhao JJ, Xu J, et al. Medicinal uses, phytochemistry and pharmacology of the genus Uncaria. Journal of Ethnopharmacology 2015, volume 173, pages 48-80. https://doi.org/10.1016/j.jep.2015.06.011