6a, 
8a. 
io} 
10a, 
Ll, 
lla. 
Column with distinct, linear processes on each 
side of the stigma; disc of lip with scattered 
wart-like papillae in center. . . Wee ew . OJ Kennedyi 
Column without any processes on each side of stigma; 
dise of lip without any wart-like papillae in center .... 6 
Flowers medium size; sepals not more than 
15 mm. long; lateral lobes of lip oblong- 
rectangular with obliquely truncate apex . . . O. cucullatum 
var. cucullatum 
Flowers large; sepals at least 20 mm. long; 
lateral lobes of lip never oblong-rectangular . 
Lateral lobes of lip rectangularly spreading 
obliquely triangular or dolabriform . . . . .  O. cucullatum 
var. dolabratum 
Lateral lobes of lip recurved toward midlobe, 
obliquely ovate. 2. 2... 2 ww ee ee OW cucullatum 
var. macrochilum 
Callus of lip elongate, consisting of three 
variously confluent, parallel ridges . 
&% 
Callus of lip short, consisting of five confluent 
tubercles in three rows, two on each side and 
the fifth in the middle. . ..........2.2.2. 2.18 
Petals unicolored except margins; clinandrium 
cucullate; callus of lip compressed, keel-like, 
the median ridge much longer than the very 
obscure lateral ridges, nose-like laterally . . . O. rhodostictum 
Petals marmorate to barred; clinandrium 
collar-like, marginate; callus of lip not com- 
pressed, the median ridge often considerably 
shorter than the lamella-like lateral ridges, 
never nose-like . . . .. . ae . ee eae ae 
Lateral sepals connate into a bifid sy aoa 
petals froma cuneate base elliptic-lanceolate, 
abruptly acute to acuminate .............421 
Lateral sepals free at least to middle, spread- 
ing; petals broadly elliptic, sessile, obtuse . . O. spathulatum 
Callus of lip obovate in outline, concave with 
entire, raised margins, bidentate at apex and 
with a shorter keel in the center originating 
from the middle of the callus . . . . . . . OJ Phalaenopsis 
Callus of lip quadrate to oblong in outline, 
conver, consisting of three parallel ridges of 
which the two outer ones are obscurely lobu- 
[ 139 } 
