The Mindanao specimen reported as 7’. bicristatum by 
Ames in Merrill Enum. Philipp. Flow. Pl. 1 (1925) 405 
is 7’. comans. 
Luzon, Leyte. 
2. Thrixspermum Robinsonii Ames Orch. 5 
(1915) 207. 
Apparently widely distributed but not common in 
the Philippines. The two specimens which I have seen 
from Negros are sterile, but probably belong to this spe- 
cies. The specimens from Mindanao differ from the type 
in having a more prominent and more pubescent median 
callus. By typographical error, the mid-lobe of the lip is 
characterized as pubescent in the original description. 
Luzon, Leyte, Negros, Mindanao. 
3. Thrixspermum Elmeri L.O. Williams sp. nov. 
Planta parva, foliosa. Folia disticha, oblongo-lanceo- 
lata. Pedunculus gracilis, folium multo excedens. Brac- 
teae inflorescentiae leviter subulatae, acutae, imbricatae. 
Sepalum dorsale elliptico-ovatum, obtusum. Petala sep- 
alis similia. Labellum leviter saccatum, trilobatum; lobi 
laterales semiorbiculares; lobus medius semiorbicularis, 
parvus. 
A small epiphytic herb. Stems about 1.5—2 cm. long, 
slightly complanate, leafy. Leaves distichous, crowded, 
coriaceous, rugose when dry, oblong-lanceolate, about 3 
em. long and 5-6 mm. broad; persistent leaf-sheaths cov- 
ering the stem. Peduncles glabrous, slender, suberect or 
erect, much longer than the leaves, with one or more 
sterile bracts subtending the inflorescence. Inflorescence 
densely flowered, about 1 em. long. Bracts of the inflo- 
rescence somewhat subulate, acute, imbricated, narrowly 
triangular, about 1.5-2 mm. long. Dorsal sepal elliptic- 
ovate, obtuse, 3- to 5-nerved, about 4 mm. long and 2 
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