Pitardella mussaendoides Junhao Chen & K. M. Wong 2024, comb. nov.

Pitardella mussaendoides (Craib) Junhao Chen & K.M.Wong, comb. nov. Basionym:— Randia mussaendoides Craib, Fl. Siam. ii. 104 (1932); Craib, Kew Bull. 1932: 286 (1932), descr. ampl. Homotypic synonyms:— Tarenna mussaendoides (Craib) K.M.Wong, Arbor. Rubiaceae Malaya 205 (1988); Porterandia mussaendoides (Craib) Tirveng., Biogeographica 79(1): 37 (2003). Type:— Thailand, Krabi, evergreen on rocky limestone hill, c. 50 m, Kerr 18849 (lectotype K [K000172819], designated here; isolectotype BM [BM000945262]). Distribution and habitat:— Pitardella mussaendoides occurs in Peninsular Thailand and Peninsular Malaysia, in evergreen forest on limestone hills. Additional specimens examined:— Peninsular Malaysia, Perlis, Kaki Bukit, 11 April 1938, Kiah SFN 35252 (SING); Malacca, Bukit Klanara, Alvins 1190 (SING). Notes:— Originally described as Randia mussaendoides (Craib 1932), the species was variously assigned to Tarenna (Wong 1988) and Porterandia (Tirvengadum 2003). The protologue of Randia mussaendoides indicates that Kerr 18849 is the type specimen but does not specify a particular herbarium in which it was deposited. The K sheet is the better sheet with mature flowers among the two duplicates at BM and K, and is therefore here selected as the lectotype.