(Rubiaceae) Oxyceros horridus Lour.

Local name(s): ຄັດ ເຄົ້າ ເຄືອ (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

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Local name(s): ເຄືອ ຄັດ ເຄົ້າ (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.  

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

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Local name(s): ເຄືອ ຄັດ ເຄົ້າ (keuah khat khao)

Medicinal use(s): treat gonorrhea 

Part(s) used: stem; root

Field Characters: Shrub-like liana, leaves opposite. 

Locality: Khammouane Province; Nyomalat District; Tong Kong Village, roadside of Route to MBP; at the southern reaches of Nakai Nam Theum National Park. 

Habitat: Tropical rainforest on flat level lands. 

Altitude: 150 m asl. 

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

Collection number(s): Onevilay_YML_044

Collection Date: July 21, 2023

Additional information:  

Synonyms, images, taxonomic description: 

Medicinal properties:

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.