448 MR. R. ALLEN ROLFE ON THE GENUS VANILLA. 
* Leaves oblong or elliptical-oblong. 
+ Nerves of lip smooth or verrucose. 
§ Sepals and petals 1? in. long, or longer. 
Extra-Brazilian species. 
a. Bracts oblong or linear-oblong, small. 
Disc of lip smooth 
Disc of lip verrucose .... 
b. Bracts elliptical or elliptical- oblong, 
larger. 
Fruits subcylindrical, 3 in. long 
Fruits trigonous, 5-7 in. long 
Brazilian species. 
a. Lip not strongly keeled in front. 
Bracts subdistichous .... 
Bracts scattered . 
b. Lip strongly keeled in front... 
§§ Sepals and petals 14 in. long .... 
++ Nerves of lip bearing small foliaceous 
appendages. 
Lip with broad sub-obtuse apex 
Lip with narrow acute apex... “ 
** Leaves linear-oblong or linear-lanceolate. 
a, Leaves over an inch broad. 
Leavesbroadat base. Brazilian species 
Leaves somewhat narrowed at base. 
Peruvian species 
B. Leaves } to scarcely an inch broad. 
Leaves ensiform, 7-10 lin. broad 
Leaves linear-lanceolate, 5-7 in. broad 
B. Stems aphyllous, or with leaves reduced to 
bract-like scales .... 
* Sepals and petals 1-1, or rarely 2 in. long. 
+ West Indian species. 
a. Scales $-2 in. long, and rather narrow. 
Disc of lip glabrous, or nearly so 
Disc of lip barbellate... 
b. Scales 2$-34° in. lon and rather 
broader . . 
++ Asiatic species. 
a. Hairs on disc of lip 2 or more lines 
long. 
Hairs on dise of lip arranged in a 
single median line 
24, V. Hostmanni 
25. V. planifolia. 
26. V. pheantha. 
27. V. Pompona. 
28. V. Gardner. 
29. V. Velloziz. 
30. V. carinata. 
31. V. columbiana. 
32. V. bicolor. 
33. V. appendiculata. 
34. V. Chamissonis. 
35. V. Ruiziana. 
36. V. ensifolia. 
37. V. odorata. 
Section APHYLL2. 
38. V. claviculata, 
39. V. barbellata. 
40. V. Eggersi. 
41. V. aphylla. 
nea peeeeaenenesns pacman 
