Bulbophyllum dhaninivatii Seidenfaden

Vermeulen, Jaap J., Phelps, Jacob & Thavipoke, Patana, 2014, Notes on Bulbophyllum (Dendrobiinae; Epidendroideae; Orchidaceae): two new species and the dilemmas of species discovery via illegal trade, Phytotaxa 184 (1), pp. 12-22 : 18-21

Bulbophyllum dhaninivatii Seidenfaden (Section Lemniscatae)

Seidenfaden (1965: 154).

Type: — Thailand, Phu Mieng, GT 5469 ( C, not seen) .

Heterotypic synonym: Bulbophyllum tripaleum Seidenfaden (1979: 203) .

Type:— Thailand, Ban Mussoe, GT 7279 ( C, not seen) .

Notes:— Bulbophyllum dhaninivatii and B. tripaleum are similar, except for the presence of the paleae on the sepals in the latter species. Next to this, the drawing of B. tripaleum in Seidenfaden (1979: 203) shows a lip with keels, but the description only mentions a ‘v-shaped concavity on upper surface’ We assume that he meant to describe the v-shaped ridge surrounding the basal cavity. If so, the lip is about identical to that of B. dhaninivatii . The sample Phelps 2012 ( Thailand) is intermediate between the two types. It has some flowers without paleae on the sepals, and others with much smaller paleae than in B. tripaleum . We identify Phelps 2012 as B. dhaninivatii and conclude that both names refer to the same species. Plants lacking the paleae are occasionally found in other species in section Lemniscatae with paleate sepals, e.g. in B. lemniscatoides Rolfe (1890: 672) ( var. exappendiculatum Smith, 1920: 92 ).