on either side of which is a callus; dise with two ovate or 
oval callus-like thickenings; on the outer side of each of 
the terminal calli is a lacerated membrane or coma of 
coarse hairs; lateral margins of the lip serrated. Column 
slightly arched, glabrous, 7-8 mm. long. 
Plocoglottis bicomata is not closely allied to any of 
the other Philippine species of Plocoglottis. It may be 
distinguished from all of them by the large pseudobulbs, 
by the two tufts of hair, by the two large terminal cal- 
lion the lip and by the two large callus-like thickenings 
on the dise of the lip. Plocoglottis bicomata appears to be 
closely allied to Plocoglottis pubiflora Schitr., a native 
of New Guinea. I have not seen specimens of the New 
Guinea species, but from the description it seems to be 
amply distinct. 
By vegetative characters, Plocoglottis bicomata is not 
easily distinguished from the other Philippine species, 
but because of the two patches of pubescence and the 
two large thickenings on the lip, this is perhaps the most 
distinctive Plocoglottis known from the Philippines. 
Luzon: Rizal Province, Paningtingan. March 1915, Loher s. n. 
(Type in Herb. Ames No. 44335) ; Rizal Province, Sumag. April 1914. 
Loher s. n. 
4. Plocoglottis lucbanensis 4 mes in Elmer Leafl. 
Philipp. Bot. 5 (1912) 1572. 
Plocoglottis luchanensis may be recognized without 
much difficulty by the small distinetively shaped lip and 
by the compact inflorescence. 
5. Plocoglottis mindorensis Ames in Philipp. 
Journ. Sci. 2 (1907) Bot. 827. 
Plocoglottis Wenzela Ames Orch. 5 (1915) 101. 
Plocoglottis McGregorti Ames Orch. 7 (1922) 121. 
This species appears to embrace a group of rather 
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