Colombia is a mixture of Castilla and Perebea latex, and 
it may well be that other genera furnish a part of this 
rubber so eagerly sought for during the recent war. 
PROTEACEAE 
Roupala colombiana RP. E. Schultes sp. nov. 
Arbor quindecim ad viginti quinque pedes alta, appar- 
enter ramosa. Ramuli teretes, densissime et molliter 
rufo- vel cinereo-tomentosi. Folia alterna, elliptico-ovata, 
apice rotundato-subacuta (sed nune subrotundata vel 
obscure acuta), basi late cuneata vel rotundata (Killip & 
Smith 19737), valde marginata, integra, vel saepe obscure 
sinuata (Kx. & S. 19737), valde coriacea, maturitate 7-10 
em. longa, 4.5-6.5 em. lata (13 em. longa, 10 cm. lata in 
K.& S. 19737), supra minute fusco-tomentella, nervorum 
centralium nervos secundarios versus dense sordide cin- 
ereo-tomentosa, venis plerumque elevatis et bene con- 
spiculs, infra omnino densissime et molliter rufo-tomen- 
tosa (folia juniora multo rufiora), venis non valde elevatis; 
petioli dense tomentosi, 1—2.5 cm. longi. Racemi multi- 
flori, axillares, quam folia multo longiores, aliquid rigidi, 
usque ad 15 cm. longi vel longiores, rhachide floribusque 
dense rufo-tomentosis. Bracteae minutissimae, caducae. 
Alabastri densissime rufo-tomentelli. Calycis lobi valde 
clavati, usque ad 11-12 mm. longi, contorti. Stylus lon- 
gior, usque ad 12 mm. longus. Ovarium subcompresso- 
ovoideum, densissime et grossiuscule tomentosum, 2X 
1.7X1.5 mm. Folliculus obliquus, elliptico-oblongus, 
valde compressus, apice attenuato-acutus, cinereo- vel 
fusco-tomentellus. 
Vegetatively, Roupala colombiana resembles R. saai- 
cola, but the reddish or rusty indumentum of the former 
is very much denser and softer than that of the latter. 
There is likewise a difference in the shape of the leaves. 
The flowers and the peculiarly strict, very long and 
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