ORCHID STUDIES, V 
BY 
Louis O. WILLIAMS 
THROUGH THE KINDNEss of Dr. William R. Maxon, 
Curator of the United States National Herbarium, the 
orchids collected by Joseph F. Rock in Yunnan Prov- 
ince, China, and adjacent Burma in 1922-1923 have been 
made available for study. The collection contains 157 
numbers of orchids, many of which are of unusual inter- 
est. In addition to the two species described below, there 
are several others which possibly will prove to be new 
when more critical studies and comparisons can be made. 
In addition to the collection of Chinese orchids men- 
tioned above, an interesting Philippine species of 'Taenio- 
phyllum (which belongs to the genus segregated by Dr. 
Rudolf Schlechter as Geissanthera) has made the study 
of several allied species necessary. This species and its 
allies are discussed, and an additional Philippine species 
of ‘Taeniophyllum (subgenus Eutaeniophyllum) is de- 
scribed. 
Orchis constricta L.O. Williams sp. nov. 
Herba parva, terrestris, 4-8 em. vel ultra alta. Folia 
duo, basalaria, late elliptica,acuta vel acuminata, basi levi- 
ter petiolata. Bracteae inflorescentiae lineari-lanceolatae, 
acutae. Inflorescentia uniflora. Sepalum dorsale rhom- 
bico-lanceolatum, obtusum, leviter naviculare, triner- 
vium. Sepala lateralia late lanceolata, obtusa, faleata, ob- 
liqua, trinervia. Petala lineari-lanceolata, obtusa vel acuta, 
binervia. Labellum trilobatum; lobi laterales basi labelli, 
lineari-lanceolati,acuti; lobus medius rhombicus, obscure 
crenulatus vel integer; calear elongatum,curvatum, prope 
apicem constrictum. 
A small terrestrial herb 4-8 em. or more tall. Tubers 
[ 164 ] 
