178 cxxxiii. ORCHiDE^ (rolfe). [Vanilla 



clavate, 7-8 lin. long. Capsule not seen. — Vanilla sp., Lindl. in Jouri 

 Linn. Soc. vi. 137. 



Upper Guinea. Western Lagos, Rowland ! Niger Territory, Angiama, Barte 

 20134! 



5. V. crenulata, Uolfe in Joum. Linn. Soc, xxxii. 477. Stem 

 rather slender; internodes 2-3 in. long. Leaves petiolate, elliptic- 

 dblong, abruptly acuminate, 2-5 in. long, 1J-2| in. broad ; petioles i^>-G 

 lin. long. Racemes \-l\ in. long, not branched. Bracts broadly 

 triangular-ovate, subobtuse, concave, 1-3 lin. long. Flowers purple 

 and white. Sepals 11-13 lin. long, 4-4|^ lin. broad; dorsal lanceo- 

 late-oblong, subobtuse, concave ; lateral elliptic-oblong, obtuse, caii- 

 nate. Petals falcate-oblong, subobtuse, 11 lin. long, 3 J lin. broad. 

 Lip trilobed, G lin. long ; side lobes oblong, adnate to the sides of the 

 column, free margin reflexed and crenulate ; front lobe triangular-ovate, 

 subobtuse, sides ponduplicately reflexed and crenulate ; crest composed 

 of few scales. Column incurved, 9-10 lin. long. 



Vpper 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, 3-3J in. long, lf-2 in. broad ; petioles 4-6 lin. long. 

 Racemes 1^-2 in. long, not branched at the base ; rhachis slightly com- 

 pressed. Bracts triangular-ovate, subacute, 1 lin. long. Pedicels 

 1J-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. 



Vpper Guinea. Old Calabar, Thomson, 182 ! 



7. V, imperialis, Kriinzl. in Notizbl. Bot. Gart. Berlin, 1896, 155, 

 1. 1. Stem very thick, 14 lin. broad. Upper leaves oblong, apiculate, 

 6 in. long, 3J 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 J 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 J in. long. — Rolfe in Journ. Linn. Soc. xxxii. 478. 



Upper Guinea. Cameroons : Yaunde, near Ungomessam, 2600-2900 ft., 

 ZenJcer and Staudt, 626. 



Most closely allied to the following species. 



