Thrixspermum clavatum (Koenig) Garay, comb. nov. 
Basionym: Epideudrum clavatum Koenig in Retz, Observ. Bot. 6: 
50, 1791. 
Thrixspermum laurisilvaticum (Fukuyama) Garay, comb. nov. 
Basionym: Sarcochilus laurisilvaticus Fukuyama in Bot. Mag. Tokyo 
52: 26, 1938. 
Thrixspermum pusillum (Guillaum.) Garay, comb. nov. 
Basionym: Ascochilus pusillus Guillaum. in Bull. Mus. Hist. Nat. 
Paris, ser. 2, 29: 347, 1957. 
Trachoma Garay, gen. nov. 
Type: Dendrocolla rhopalorhachis Rehb.f. 
Etymology: V'rachoma= roughness, in reference to 
the short inflorescence which is quite rough because of 
the remnants of densely packed bracts. 
Perigonii phylla libera, patentia. Sepala quam petala 
longiora, subsimilia. Labellum carnosum, lateraliter plus 
minusve compressum, calceoliforme, interdum subcalca- 
ratum vel saccatum, intus ecallosum, antice tuberculoso 
vel pulvinato incrassatum, basi columnae adnatum, non 
articulatum. Columna humilis, crassa, apoda. Clinan- 
drium humile. Rostellum erectum, bifidum, breve. 
Stigma magnum, suborbiculare. Pollinia 2, globosa, in- 
tegra, ut plurimum breviter obscureque sulcata, stipiti 
lineari affixa; glandula valde evoluta. 
Herbae epiphyticae; caulibus plus minusve elongatis, 
foliosis; foliis satis coriaceis, lineari-falcatis, distichis; 
inflorescentiis abbreviatis breviter pedunculatis, rachide 
congestis, distincte incrassatis, paucifloris ; floribus tenui- 
bus, satis fugaceis. 
It differs from Saccolabium Bl. in the footless column, 
in the short erect rostellum and in the robust habit. 
Tuberolabium Yamamoto which closely resembles 7'ra- 
choma, differs in having a column-foot to which the lateral 
sepals are adnate obliquely and in the elongate, multi- 
flowered inflorescences with alate-ribbed rachis. 
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