•230 
CONTRIBUTIONS TO BOTANY. 
3. Emmotum fagifoUum, Desv. in Ham. Prodr. 29; nob., loc. 
cit. p. 179; liuj. op. p. 189. tab. 21 a. — Pogopetalum acu- 
tnin, Brnth. in Hook. Lond. Journ. Bot. ii. 377. — Guiana 
Gallica. 
4. Emmotum affine, nob., loc. cit. 180; buj. op. p. 110. — 
Pogopetalum affine, Planch. — Brasilia (Sellow). 
.5. Emmotum nitens, nob., loc. cit. 180; buj. op. p. 110. 
tab. 22 a. — Pogopetalum nitens, Benth. loc. cit. ii. 377. — 
Brasilia intertropica. 
0. Emmotum glabrum, Bth. MSS. ; — foliis ellipticis, utrinque 
acutis, apice longe attenuatis, glaberrimis, subcoriace'is, supra 
fusco-viridibus, subtus pallide ferrugineis, margine revoluto, 
nervis omnino immersis, lineis striatis transversis interrupts 
creberrime parallelis utrinque iusculptis, costa media rubella, 
margine revoluto, petiolo canaliculato ; paniculis brevibus, 
petiolo 2-3-plo longioribus, pedunculo pedicellisque pubes- 
centibus, corolla et calyce glabris, hoc dentibus ciliatis, petabs 
lauceolatis, carina interna dense lanatis. — 'Rio Guainia et Rio 
Casiquiare in Brasilia Septentrionali (Spruce, 3536). 
The leaves are 3| inches long, I5 inch broad, on a petiole 
3 lines in length ; the racemes are 6-9 lines long, the flowers in 
bud 1| line long; the petals are clothed internally with dense 
silky long hairs, springing from the prominent keel ; the stamens 
are somewhat shorter than the petals ; the filaments are com- 
pressed and glabrous ; the two cells of the anthers are separated, 
and fixed upon the margins of an obcordate connective; the 
ovary is densely clothed with adpressed white sericeous hairs, 
surmounted by a glabrous style of equal length*. 
On the Tribe Colletie.®, with some Observations on 
THE Structure of the Seed in the Family of the 
Rhamnace.®. 
This tribe diff’ers from others of the Rhamnacece in having always 
opposite branchlets usually terminating in acute spines, while 
in most Rhamnaceous genera they are alternate ; for, though 
tliey sometimes approximate in pairs, they are never exactly 
opposite : the same may be said of their leaves. The Colletiece 
also differ in the position of their petals and stamens, their in- 
sertion being always perigynous upon the tube of the calyx at 
* \ drawing of this species, with analytical details, is given in this 
volume, Plate 22 b. 
