Porphyrodesme elongata (Bl.) Garay, comb. nov. 
Basionym: dérides elongata Bl., Bijdr. 8: 367, 1825. 
Porphyrodesme Hewittii (Ames) Garay, comb. nov. 
Basionym: Thrirspermum Hewittii Ames in Journ, Str. Br. Roy. 
As. Soc. Sp. No. 194, 1921. 
Syn.: Dendrocolla minima Rid]. in Journ. Str. Br. Roy. As. Soc. 
50: 1389, 1908, not Blume 1825, 
Porrorhachis Garay, gen. nov. 
Type: Saccolabium galbinum J.J.Sm. 
Etymology: porrho- = forward and rhachis = rachis, 
in reference to the position of the inflorescences which 
are inserted at a right angle to the main stem. 
Sepalum posticum cucullatum, incurvum:; sepala 
lateralia valde diversa, parallela, labello adpressa. Petala 
multo minora, parallela. Labellum carnosum, immobile, 
cum ovario angulum subrectum formans, angustum, ex- 
cavatum, lateraliter compressum, ecalcaratum. Columna 
humilis, inclinata, apoda, semiteres. Clinandrium emar- 
ginatum. Rostellum valde abbreviatum, bidentatum. 
Stigma magnum, faciem inferiorem columnae fere om- 
nino occupans, suborbiculare. Pollinia 2, globosa, in- 
divisa, esuleata, stipiti late orbiculari-rhombeo affixa; 
glandula parva, suborbicularis. 
Herbae epiphyticae, satis parvae; caulibus elongatis, 
foliosis; foliis rigidis, patentissimis; inflorescentiis axil- 
laribus, simplicibus, laxe multifloris: floribus minutis, 
flavescentibus. 
In general appearance as well as in the floral structures 
the characters of this new genus appear to be similar to 
those of the genus Micropera Lindl. However, the deep- 
ly cleft clinandrium with the short, bidentate rostellum, 
together with the undivided pollinia on short, semiro- 
tund stipes amply differentiates it from the vegetatively 
much larger plants of Micropera. 
Porrorhachis galbina (J.J.Sm.) Garay, comb. nov. 
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