(Rubiaceae) Oxyceros horridus Lour.

Local name(s): (khat khao kheua; khat khao nam koh)

Medicinal use(s): Treat belly aches.

Part(s) used: root or liana

Field Characters: Vine-like shrub, with hard, curving spines, fruits green. Only this one seen.

Locality: Savannakhet Province, Kaysone district, Medicinal Biodiversity Preserve, at 19 km from city center on road Kaysone-Seno.

Habitat: Broadleaved evergreen, lowland tropical rain forest in regeneration from some degree of past conversion.

Altitude: 158 m asl 

Collector(s): D.D. Soejarto, K. Sydara, O. Souliya

Collection number(s): DDS 14910

Collection Date: December 17, 2013

--

Local name(s): ເຄືອຄັດເຄົ້າ  (Kheua Khat khao) 

Medicinal use(s): treat leucorrhea 

Part(s) used: vine

Field Characters: Liana with hooks, fruits green, finely hairy.

Locality: Oudomxay, Muang Xay District, Donxay Village, Medicinal Biodiversity Preserve, about 3 km south of the city.  GPS reading: At the vicinity of 20o 40.0181’ N; 102o 00.155’ E.

Habitat: Forested slope in a broadleaved, mixed evergreen lowland tropical rainforest on a mountain slope.

Altitude: 950-970 m asl. 

Collector(s): D.D. Soejarto, K. Sydara, M. Xayvue

 Collection number(s): DDS 15110

Collection Date: September 26, 2014

Additional information:  

Synonyms, images, taxonomic description: 

Useful references:

Surapong Rattana S, Sungthong B. Antioxidant activities, total phenolic and total flavonoid contents of Oxyceros horridus crude extracts. BMC Complement Altern Med 2012, 12: 221. Published online 2012 Nov 16. doi: 10.1186/1472-6882-12-221

Sutopo NC, Rahmawati L, Huang L, et al. Anti-inflammatory, Antioxidative, and Moisturizing Effects of Oxyceros horridus Lour. Ethanol Extract in Human Keratinocytes via the p38 Signaling Pathway. Chemistry & Biodiversity 2024, volume21, issue4, e20230179.  https://doi.org/10.1002/cbdv.202301791 https://onlinelibrary.wiley.com/doi/10.1002/cbdv.202301791

Tiranakwit T, Puangpun W, Tamprasit K, et al. Phytochemical screening on phenolic, flavonoid contents, and antioxidant activities of six indigenous plants used in Traditional Thai Medicine. Int J Mol Sci. 2023, 24(17):13425. doi: 10.3390/ijms241713425. PMID: 37686230; PMCID: PMC10487580.