630 FLORA OF SOUTH AMERICA. 
obtuse trigonus, laciniæ exteriores cum angulis tubi continue, 
6 lin. longe, 1 lin. late, crassiuscule, molliter et tenuiter 
puberulæ, aveniæ, 3 interiores setiformes, 1 lin. longæ. Cap- 
sula oblonga, superne attenuata, 3-4 lin. longa, stylorum 
vestigiis coronata, trisulca, sulcis laciniis interioribus peri- 
gonii oppositis, intus sulcis intromissis semitrilocularis. Semen 
e basi cavitatis erectum, stipitatum, profunde trisuleum.— 
Pedrero, on the Rio Negro, Schomburgk, \st. Coll. n. 924, 
(female specimens), and n. 957, (male specimens). 
'The above species resembles R. salicifolia in the shape 
of the leaves, but the habit is much more rigid, and the 
perigon, especially when in fruit, very different in shape. 
859. R. brachystachya, sp.n., foliis ovatis oblongis sublan- 
ceolatisve, perigonii fructiferi subsessilis minute pubescentis 
laciniis ovato-oblongis achænium æquantibus v. vix superan- 
tibus.—Specimina quz vidi deflorata sunt, fructibus plerisque 
fere maturis. Rami breves, ramosissimi. Folia latiora et 
obtusiora quam in R. tenuiflora, in uno specimine pleraque 
1-1} poll. longa, 6-9 lin. lata, in altero 2-3 poll. longa, 1-13 
poll. lata. Fructus in racemis brevibus conferti. Bracteæ 
minute. Perigonium basi in pedicellum brevissimum longe 
attenuatum, 6 lin. longum, tubo incluso trigono sesqui-lineari, 
molliter at brevissime pubescens, laciniis exterioribus con- 
cavis obtusis medio 2 lin. latis, interioribus setaceis dimidio 
brevioribus. Achenium profunde trisulcum, sulcis intromis- 
sis semi-triloculare. Semen e basi cavitatis funiculo flexuoso 
stipitatum, obtuse trigonum, ruminato-sulcatum. Embryo in 2 
apice albuminis brevis, axilis, radicula supera, cotyledonibus — 
latis tenuibus subflexuosis.—British Guiana, Schomburgk, 9 
single specimen from the Ist Coll, and n. 345 (541) of 
the 2nd Coll. 
860. Symmeria paniculata, gen. nov.—Frequent on the d 
banks of the upper Essequibo, Schomburgk, 1st Coll. n. 138. E 
Char. gen. Symmerta. Flores dioici. Masculi: Perigonium - - 
sexpartitum, segmentis orbiculatis patentibus, 3 exterioribus — 
minoribus. Stamina indefinita (ultra 20). Ovarii rudimentum — — 
nullum. Fœminei: Perigonium sexpartitum, segmentis * 
