but differs from these species in many respects. The pet- 
als and sepals of 7’. ligulatwm are very broad in compari- 
son to those of the allied species; the lanceolate, but not 
long-caudate, lip is another point of difference; the in- 
florescence generally has far fewer bracts of which the 
upper margins encircle the rachis, whereas they are ad- 
nate near the middle of the rachis in the allied species; 
vegetatively the plant is larger than any which I know 
in the genus. 
Luzon: Montalban, Province of Rizal, May 1915, Loker s. n. 
(Tyre in Herb. Ames No. 50009) and Loher 13320 (Coryre in Herb. 
Ames No. 43957); [Mt.?] Paete, Province of Laguna, June 1915, 
McGregor 22819 (Philipp. Nat. Herb., Manila) ; on trees, Province 
of Laguna, June 20, 1912, Reillo 27. 
The following sterile specimens, which are in the 
Philippine National Herbarium, seem to belong to this 
species. 
Luzon: on tree, Papat, Province of Laguna, February 24, 1913, 
Ramos 20448; San Fernando, Province of Unién, January 1922, Lete 
666, 
20. Thrixspermum rostratum Ames Orch. 5 
(1915) 208. 
Apparently a rare plant which is dubiously distinct 
from 7\.elongatum Ames. 
Panay, Samar. 
21. Thrixspermum elongatum 4mes Orch. 5 
(1915) 2038. 
A most difficult species to study because of the 
ephemeral nature of the flowers. The mid-lobe of the lip 
is somewhat fleshy, terete, and often becomes deformed 
in drying. 
It is quite possible that the material referred here 
represents more than one species. Certainly the material 
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