478 MR. R. ALLEN ROLFE ON THE GENUS VANILLA. 
lateralibus elliptico-oblongis obtusis carinatis ; petalis falcato- 
oblongis subobtusis ; labello trilobo, lobis lateralibus oblongis a 
lateribus column adnatis marginibus liberis reflexis crenulatis, 
intermedio triangulo-ovato subobtuso reflexo - conduplicato 
crenulato, crist&é appendicibus foliaceis paucis composita; 
columna brevi incurva. 
Hab. W. Trop. Africa. Sierra Leone, Bumban to Lokko, 
Scott Elliot, 5733! Ashanti, Prahsu, H. A. Cummins, n. 4! 
‘“* Flowers purple and white.” 
Internodi 2-3 poll. longi. Folia 2-5 poll. longa, 13-2} poll. 
lata; petioli 3-6 lin. longi. Racemi 1-1} poll. longi. Bractee 
1-3 lin. longs. Pedicelli 14 poll. longi. Sepala 11-18 lin. 
longa, 4-4) lin. lata. Petala 11 lin. longa, 34 lin. lata. 
Labellum 6 lin. longum. Columna 9-10 lin. longa. 
Allied to V. ramosa, Rolfe, but distinguished by the 
broader and less acute crenulate front lobe of the lip, the 
unbranched inflorescence, &c. Mr. Scott Elliot’s specimen 
possessed no flower, but that collected by Dr. Cummins, which 
is evidently identical, enables the description to be prepared. 
The fruit is unknown. 
16a. VANILLA IMPERIALIS, Kraenzl. in Notizbl. Bot. Gard. 
Berlin (1896) p. 155, t. 1. 
Allied to V. grandiflora, Lindl., and has yellow flowers of 
about the same size, though different in other respects. 
Hab. W.Trop. Africa. Yaunde, near Ungomessam, Cameroon 
district, Zenker and Staudt, 626. 
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