MR. O. BENTHAM OX A>~0>' AC'E.V,. GO 



outer, is however certainly imbricate, and fixes its place among 

 the Uvariece, and not with the JJnonece. 



A North Brazilian plant which I described in 1843 as Ouatteria 

 heteropetala, from a specimen of Schomburgk's, and which occurs 

 again in Spruce's collection under the no. 3184 (gathered on the 

 sandy banks of the Yasiva, an affluent of the Casiquiare), must be 

 excluded from that genus and from the tribe of Uvariece. The 

 outer petals are small and sepal-like, and the inner ones thick, 

 erect, and connivent, as in the Asiatic Phceanthus. I felt, indeed, 

 some hesitation whether I should not refer it at once to that genus ; 

 but some differences in the consistence of the petals, in the styles, 

 in the habit and country, may warrant the maintaining it distinct, 

 and we have accordingly proposed it as such, under the name of 

 Heteropetalum brasilieme. 



TJvaria brasiliensis, Veil., described and partially figured in 

 Martius's Flora Brasiliensis, and of which Mr. Spruce gathered a 

 variety with longer peduncles in the woods near Tarapoto, distri- 

 buted under the no. 4097, is again a very distinct plant, to be 

 removed from Uvariece and placed under the same subdivision of 

 the tribe Mitrephorecs. The large, thick, concave inner sepals and 

 the many-ovuled carpels are quite sufficient to characterize it as a 

 distinct genus, to which we have given the name of Cymbopetalwm. 



The second species referred to XTvaria by Martius is the Trigyneia 

 of Schlechtendahl, equally to be removed from Uvariece on account 

 of the valvate petals, and forming a new genus allied on the one 

 hand to Unona among Unonece, and on the other to Melodorum 

 among Xylopiece, but best placed next the former genus, from 

 which indeed it chiefly differs in the small size and orbicular con- 

 cave shape of its petals. Besides the original T. oblongifolia, 

 Schlechtendahl (to which, rather than to Ouatteria Hilariana, 1 

 would refer the Uvaria hirsuta, Veil. Fl. Flum. vol. vi. t. 124), 

 this genus will comprise the following three new species : — 



Trigyneia Matthewsi. Glabra v. partibus novellis minute pilosu- 

 lis, foliis oblique oblongis acuminatis basi subangustatis vix coriaceis, 

 baccis globosis. — Arbor parva, valde raraosa. Folia 4-5 poll, longa, 

 H-2 poll, lata, venis primariis a costa divergentibus obliquis arcuatis 

 utrinque 6-8, supra impressis subtus prominentibus. Petiolus brevis- 

 simus. Pedicelli 6-8 lin. longi, in axillis solitarii v. saepius complures 

 pedunculo brevi communi fulti, infra medium minute braeteolati. 

 Flores albidi, circa 3 lin. diametro. Carpella 5-6. Baceac globosa*, 

 4-5 lin. diametro, stipite 2 lin. longo. 



Near Tarapoto in Eastern Peru (Matthews, no. 1421 ; Spruce, no. 440-'). 

 J'TNN. PHOC. — BOTANY, VOL. V. ° 



