(Rubiaceae) Ridsdalea wittii (Craib) J.T.Pereira 

Local name(s): 

Medicinal use(s): 

Part(s) used: 

Field Characters: Treelet, stem brown, smooth, flower buds large, white, when opene petal surface inside with pinkish purple dots ornamentation. Only tree seen.


Locality: Attapeu Province, Samakhi Xay District, Beng Phou Kham, Ban 52, at a roadside between Attapeu and Pakse, about 56 km from Attapeu, in the forested area of the Xenamnoi hydroelectric power dam.

GPS reading: 15o 09.402’N;  106o 44.006’ E.

Habitat: Roadside, edge of forest at base of a forested slope, in a submontane tropical rain forest.

Altitude: 210 m asl. 

Collector(s): D.D. Soejarto & K. Sydara 

Collection number(s): DDS 15280

Collection Date: April 2, 2017

Additional information:  

Voucher specimen is in deposit at the Field Museum (F) Herbarium, Chicago, USA under accession no. 2324256.Leal, stembark, root samples of DDS 15280 were collected for anticancer testing.

Synonyms, images, taxonomic description: 


Plants of the World onlineGBIF | Global Biodiversity Information Facility (as Rothmannia wittii)

Useful references:

Chaipukdee N, Kanokmedhakul K, Kanokmedhakul S, et al.. Two new bioactive iridoids from Rothmannia wittii. FacSci Med Health 2016, 113: 97–101. DOI: 10.1016/j.fitote.2016.07.007


Yamasaki K, Kanchanapoom T, Klai-on S, et al. A New Tricyclic Iridoid Glucoside from the Thai Medicinal Plant, Rothmannia wittii. Heterocycles 2002, 57(12): 2409–2412. https://doi.org/10.3987/com-02-9622