Liriosma, Leretia, Poraqueiba, and Emmotum. 365 



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, canaliculato ; paniculis axillaribus et 

 terminalibus 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 IJ inch ; the flowers in bud are li line long, on pe- 

 dicels of i^ a line in length. 



PORAQUEIBA. 



When the structure of this genus was described [huj, op, 

 2 ser. ix. 482), I had not been able to detect any apparent de- 

 hiscence of the anther-cells : those in the species of which the 

 diagnosis is given below, were, however, sufiiciently 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 I have shown 

 to occur in Emmotum [loc. cit. x. 177). This genus must there- 

 fore be referred to the tribe Emmotecs (loc. cit. ix. 223). To 

 the generic diagnosis of Foraqueiba, as above cited, we must add, 

 to the description of the anthers — 



loculis singulatim margine unico a connectivo soluto, hinc 

 rima longitudinali lateraliter dehiscentibus. 



1. Poraqueiba Guianensis, Aubl., huj. op. 2 ser. ix. 483; Con- 

 trib. Bot. i. 71. — Guiana Gallica. 



2. Poraqueiba Surinamensisy nob., ibid. p. 483; Contrib. Bot. 

 i. 72. tab. 10. — Surinam. 



3. Poraqueiba sericea, Tulasne, ibid. p. 484; Contrib. Bot. i. 

 72. — Ega, Amazonas. 



4. Poraqueiba acuminata, n. sp. ; — ramulis cylindricis, tomen- 

 tillis 3 foliis ovatis, basi rotundatis vel truncatis, apice subito 

 acuminatis, crassis, coriaceis, superne nitidiusculis, subtus fla- 

 vido-pruinosis, nervis supra omnino immersis, subtus promi- 

 nentibus, parallele obliquis, ad marginem vix revolutum ar- 

 cuatim nexis, venis transversis reticulatis, rachi supra sulcato, 

 subtus valde prominente, petiolo longo crasso canaliculato; 

 racemis axillaribus folio tertio brevioribus, rachi crasso, ramis 

 crassiusculis distantibus, brevibus, divergentibus, floribus fere 



