178 CXXXIII. ORCHIDEZ (ROLFE). [Vanilla. 
clavate, 7~8 lin. long. Capsule not seen.— Vanilla sp., Lindl. in Journ. 
Linn. Soc. vi. 137. 
Upper Guinea. Western Lagos, Rowland ! Niger Territory, Angiama, Barter, 
20134! 
5. V. crenulata, Rolfe in Journ. Linn. Soc. xxxii. 477. Stem 
rather slender; internodes 2-3 in. long. Leaves petiolate, elliptic- 
oblong, abruptly acuminate, 2—5 in. long, 14—24 in. broad ; petioles 3-6 
lin. long. Racemes 1-1} in. long, not branched. Bracts broadly 
triangular-ovate, subobtuse, concave, 1-3 lin. long. Flowers purple 
and white. Sepals 11-13 lin. long, 4—44 lin. broad; dorsal lanceo- 
late-oblong, subobtuse, concave; lateral elliptic-oblong, obtuse, cari- 
nate. Petals falcate-oblong, subobtuse, 11 lin. long, 34 lin. broad. 
Lip trilobed, 6 lin. long; side lobes oblong, adnate to the sides of the 
column, free margin reflexed and crenulate ; front lobe triangular-ovate, 
subobtuse, sides conduplicately reflexed and crenulate; crest composed 
of few scales. Column incurved, 9-10 lin. long. 
Upper Guinea. Sierra Leone: between Bumban and Lokko, Scott-Elliot, 
5733! Ashanti: near Assin-yan-Coomassie, Cummins, 4! 
Distinguished from the preceding by the broader crenulate lip and other 
characters. 
6. V. ovalifolia, Rolfe in Journ. Linn. Soc. xxxii. 457. Stem 
slender. Leaves petiolate, broadly elliptical, abruptly narrowed to the 
subobtuse apex, 3-34 in. long, 13-2 in. broad ; petioles 4—6 lin. long. 
Racemes 14-2 in. long, not branched at the base ; rhachis slightly com- 
pressed. Bracts triangular-ovate, subacute, 1 lin. long. Pedicels 
13-1} in. long. Sepals and petals lanceolate-oblong, subobtuse, rather 
unequal, 8-9 lin. long. Lip deeply trilobed, 7-8 lin. long; side lobes 
roundish-oblong, obtuse ; front lobe oblong, obtuse, crenulate; middle 
nerve thickened; crest composed of many broad scales. Column 
clavate, 6-7 lin. long. 
Upper Guinea. Old Calabar, Thomson, 132! 
7. V. imperialis, Kränzl. in Notizbl. Bot. Gart. Berlin, 1896, 155, 
t.1. Stem very thick, 14 lin. broad. Upper leaves oblong, apiculate, 
6 in. long, 3} in. broad. Racemes short and compact. Bracts broadly 
ovate, cymbiform, acute, 10-12 lin. long. Pedicels stout, 3—4 in. long. 
Sepals and petals lanceolate, acute, 3~3} in. long, 8-9 lin. broad, pale 
yellow. Lip subentire, convolute, 3-3} in. long; lower part of the 
tube narrow; side lobes obsolete, broadly expanded in front, broader 
than long, white below, deep purple above, with white spots; margin 
crenulate, undulate; crest central, composed of numerous retrorse hairs, 
with a broad row of similar hairs on the front lobe of the lip, and 
another row of much smaller ones extending to the base of the lip. 
Column stout, 1} in. long.—Rolfe in Journ. Linn. Soc. xxxii. 478. 
Upper Guinea. Cameroons: Yaunde, near Ungomessam, 2600-2900 ft.» 
Zenker and Staudt, 626. 
Most closely allied to the following species. 
