Etymology: from hryptos=hidden and pylos= orifice, 
in reference to the small aperture of the labellar cavity 
which is concealed in the fleshy apex. 
Sepalum posticum erectum, cucullatum. Sepala late- 
ralia semireflexa ad pedem columnae decurrentia. Petala 
reflexa seu patentia. Labellum cum pede columnae 
articulatum, mobile, calcaratum, lateraliter compressum, 
fauce lamella horizontali omnino adnata, carnosula, ad 
apicem labelli tantum perforata clausum. Columna recta, 
basi in pedem longum, sepala lateralia superantem pro- 
ducta. Clinandrium humile. Rostellum conspicuum, 
cum columna angulum subrectum faciens. Stigma mag- 
num, suborbiculare. Pollinia 2, indivisa, perforata, stipi- 
tem lineari-spatulatum affixa; viscidium magnum, ellip- 
ticum. Anthera bilocularis, subcordata, antice truncata. 
Herbae epiphyticae: caulibus abbreviatis, internodiis, 
brevibus; foliis carnosis, paucis; inflorescentiis laxe pluri- 
floris, quaquaversis, rhachide angulata; bracteis brevibus, 
adpressis; floribus majusculis. 
It differs from Macropodanthus L.O. Wms. in the 
shape of the rostellum and the construction of the closed 
lip; from Grosourdya Rehb.f. it differs in the structure 
of the pollinia and lip. 
Cryptopylos clausus (J.J.Sm.) Garay, comb. nov. 
Basionym: Sarcochilus clausus J.J.Sm. in Bull. Jard. Bot. Buitenz. 
ser. 3, 5: 93, 1922. 
Syn.: Pteroceras clausum (J.J.Sm.) Seidenf. & Smitin., Orch. Thai- 
land 4: 532, 1963, 
Sarcochilus Pierret Guillaum. in Bull. Soc. Bot. Fr. ser. 5, 
6: 327, 1930. 
Cyrtorchis Schltr., Die Orchideen 595. Nov. 28, 1914. 
Lectotype: Angraecum arcuatum Lindl. |[Summer- 
hayes in Kew Bull. 3: 278, 1948]. 
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