866 , Mr. J. Miers on the genus Emmotum. 



sessilibus, hinc agglomerato-spicatis.— Barra do Rio Negro, 

 Amazonas (Spruce, 1748). 



This species is distinguished by its thicker and more coria- 

 ceous leaves, with their underside and nervures thickly covered 

 by a densely pruinose covering ; the nervures above {about eight 

 on each side) are wholly immersed and smooth above, extremely 

 prominent and thick beneath ; the main peduncle of the inflo- 

 rescence is much thicker, and the flowers are perfectly sessile. 

 The leaves are 8-10 inches long, 4|-5| inches broad, the petiole 

 being 1 inch long and \ inch thick : the raceme is 2| inches long; 

 its thick branchlets are 6-10 lines long, diverging at nearly a 

 right angle: the flowers, at the period of bursting, are Ig line 

 long. 



Emmotum. 



To this genus I am enabled to add only partial details of its 

 carpological structure, derived from an examination of Spruce's 

 specimen (No. 1989) of Emmotum acuminatum, with which I 

 received a single fruit. This is a drupe of a depressed globular 

 form, 8 lines in diameter, its vertical axis being 5 lines long ; 

 its coriaceous sarcocarp, about \ inch thick, covers a rugose 

 osseous indehiscent nut of about the same thickness ; the latter 

 is 5-celled, three or four of these cells being much smaller, 

 and evidently semi-abortive ; the other cell contained no seed, 

 nothing remaining within but the dried and shrivelled integu- 

 ments. 



1. Emmotum orbiculatum, nob., huj. op. 2 ser. x. 178; Contrib. 

 Bot. i. 108. — Pogopetalum orbiculatum, Benth. Linn. Trans, 

 xviii. 685. tab. 42. — In Brasilia Septentrionali. 



2. Emmotum acuminatum^ nob., loc. cit. 178; Contrib. Bot. i. 

 108. tab. 21 B. — Pogopetalum acuminatum, Benth. loc. cit, 

 685. — Rio Negro Brasilise. 



3. Emmotum fagifolium, Desv. in Ham. Prodr. 29; nob., loc. cit. 

 p. 179; Contrib. Bot. i. 189. tab. 21 a. — Pogopetalum acu- 

 tum, Benth, in Hook. Lond. Journ, Bot. ii. 377. — Guiana 

 Gallica. 



4. Emmotum affine, nob., loc. cit. 180; Contrib. Bot. i. 110. — 

 Pogopetalum affine. Planch, — Brasilia (Sellow). 



5. Emmotum nitens, nob., loc. cit. 180; Contrib. Bot. i. 110. 

 tab. 22 A. — Pogopetalum nitens, Benth. loc. cit. ii. 377. — 

 Brasilia intertropica. 



6. Emmotum glahrum, Bth. MSS. ; — foliis ellipticis, utrinque 

 acutis, apice longe attenuatis, glaberrimis, subcoriaceis, supra 

 fusco-viridibus, subtus pallide ferrugineis, margine revoluto, 



