228 
CONTRIBUTIONS TO BOTANY. 
valde ramosis, multifloris, nx pubescentibus ; floribus niinori- 
bus, petalis extus adpresse pilosis, intus breviter cottoneo- et 
incano-tomentosis. — Prope San Carlos, Rio Negro, Amazonas 
(Spruce, 3776). 
Its leaves are 8| inches long, 3| inches broad, on a petiole 
i inch in length ; the floriferous leaves are only half this size, 
or still smaller. The very branching inflorescence is 2g inches 
broad, as well as long ; the flowers in bud are somewhat globose, 
1 line in diameter, on short pubescent pedicels. 
3. Leretia nitida, n. sp.; — ramulis angulatis, glabris, lenticellis 
notatis ; foliis ellipticis, utrinque acutis, summo attenuatis et 
hinc interdum obtusis, crassiusculis, ubique glaberrimis, supra 
intense viridibus, nitidis, infra pallidioribus, nervis obliquis 
sese arcuatis, infra prominulis, valde reticulatis, margine re- 
flexo, petiolo subbrevi, canaliculate ; paniculis axillaribus et 
teruiinalibus folio dimidio brevioribus, fulvo-pruinosis, petalis 
extus pruinosis, intus pilis longis ferrugineo-sericeis donatis. 
Rio Negro, Amazonas (Spruce, 1528). 
Its leaves are 5 inches long, 1| inch broad, on a petiole 3 lines 
in length. The inflorescence is 2 inches long, spreading to a 
breadth of inch ; the flowers in bud are 1^ line long, on pe- 
dicels of a line in length. 
PORAQUEIBA. 
When the structure of this genus was described (huj. op. 
p. 71 ; Ann. Nat. Hist. 2 ser. ix. 482), I had not been able to 
detect any apparent dehiscence of the anther-cells : those in the 
species of which the diagnosis is given below, were, however, 
sufficiently ripened to show their mode of opening. I find that 
in each of the four distant cells a rupture takes place, by one 
of its margins, along the line of its junction with the connective, 
as has been correctly described by M. Tulasne, and nearly in the 
manner 1 have shewn to occur in Emmotum {loc. cit. x. 177). 
This genus must therefore be refei’red to the tribe Emmotece 
[loc. cit. ix. 223). To the generic diagnosis of Poraqueiba, as 
above cited, we must add, to the description of the anthers — 
loculis singulatim margine unico a connective soluto, hinc 
rima longitudinali lateraliter dehiscentibus. 
1. Poraqueiba Guianensis, Aubl., Ann. Nat. Hist. 2 ser. ix. 483 ; 
huj. op. p. 71. — Guiana Gallica. 
2. Poraqueiba Surinamensis, nob., ibid. p. 483; huj. op. p. 72. 
tab. 10. — Surinam. 
