constituent species. I have placed it, for the time being, 
in Rhipidoglossum, since it is clearly closely related to 
R. obanense (Rendle) Summerh. and R. globuloso-calca- 
ratum (De Wildem.) Summerh. with which it shares the 
short dense inflorescences and short swollen spur. The 
orbicular curiously veined petals are also almost identical 
with those in other species of Rhipidoglossum. On the 
other hand in the shape of the leaves and the tendency 
of the whole plant to blacken on drying the species re- 
sembles the genus Sarcorhynchus. The narrow excision 
at the apex of the lip may be looked upon as an inter- 
mediate between the entire lip-apex of S. polyanthus 
(Kraenzl.) Schltr. and the deeply lobed lip of S. bilobatus 
Summerh., described later in this paper. Another com- 
plication is the presence of a low transverse rim-like cal- 
lus just in front of the spur. Although technically this 
should place the species in Diaphananthe the callus is so 
unlike the ordinary tooth found in that genus and the 
plant shows so little resemblance to other species of Dia- 
phananthe that it scarcely seems advisable to include it 
therein. 
Further work and discoveries of yet more intermediate 
species may make it necessary to consider all three genera 
as forming a single one under the earliest name Diapha- 
nanthe, but I do not feel that the evidence so far warrants 
such a change. 
Rhipidoglossum microphyllum Swmmerhayes sp. 
nov.; a R.longicaleart Summerh. habitu graciliore, rad- 
icibus numerosissimis, foliis multo minoribus, petalis 
ellipticis, labello apice subacuto, caleari breviore facile 
distinguendum. 
Rhipidoglossum? sp. Schlechter in Engler. Bot. Jahrb. 
58 (1915) 605. 
Herba epiphytica; caulis = erectus, gracilis, leviter 
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