ORCHID STUDIES, VI 
BY 
Louis O. WitLLIAMs 
THE PRESENT NUMBER In my series of orchid studies 
contains: (1) a synopsis of the Philippine species of 
Plocoglottis, (2) a study of the polymorphic Jonopsis 
utricularioides, (8) a description of a new genus of the 
Sarcanthinae from the Philippine Islands and (4) three 
new species of orchids from Borneo. 
A SYNOPSIS OF THE PHILIPPINE SPECIES 
oF PLocociorris Blume 
Six species of the genus Plocoglottis have been de- 
scribed from material gathered in the Philippine Islands. 
All of these were described by Ames. An additional spe- 
cles is proposed in the present paper. Among the seven 
concepts now accredited to the Philippines five appear to 
be distinct on the basis of the material | have examined. 
1. Plocoglottis bicallosa Ames in Elmer Leafl. 
Philipp. Bot. 5 (1912) 1571. 
Plocoglottis bicallosa is quite easily distinguished from 
its allies by means of the lacerated lip. Although the 
leaves are usually narrow, this character is of little value 
because there is a collection available which shows very 
broad leaves, quite as broad as the leaves of the other 
Philippine species. This broad-leaved collection bears 
the following data: ‘‘in forest slopes, Mt. Halcon,’’ 
Mindoro, At 8000 feet altitude. March 10, 1922. Ramos & 
Edano 60. 
2. Plocoglottis Copelandii Ames in Philipp. 
Journ. Sci. 2 (1907) Bot. 826. 
Plocoglottis acuminata Ames in Philipp. Journ. Sci. 
2 (1907) Bot.326,nomen nudum in synon.,non Blume. 
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