224 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Calyx segments 1 to 1.8 mm. wide, rarely narrower; leaf blades 2.4 to 
6 cm. wide. 
Branchlets puberulous and spreading-pilose; leaf blades puberulous 
and pilose along midrib above....... 14. H. eleutherostylum. 
Branchlets glabrous; leaf blades glabrous above or sometimes sparsely 
incurved-puberulous along midrib. 
Leaf blades subentire or obscurely repand-crenate; fruiting calyx tube 
depressed-turbinate, the pediform base short. 
10. H. integrifolium. 
Leaf blades distinctly crenate-serrate; fruiting calyx tube turbi- 
nate, or sometimes depressed-turbinate, the pediform base dis- 
tinct, sometimes as long as the body. 
Peduncles incurved-puberulous; leaf blades incurved-puberu- 
lous or strigose along midrib beneath, not barbellate in the 
axils of the veins......................... 11. H. pittieri. 
Peduncles glabrous; leaf blades glabrous along midrib beneath, 
sometimes barbellate in the axils. 
Leaf blades glabrous beneath; inflorescence paniculate; calyx 
segments ovate-lanceolate............. 9. H. racemosum. 
Leaf blades barbellate in the axils of the veins beneath; inflo- 
rescence simply racemose; calyx segments usually lanceo- 
1 9a. H. racemosum barbellatum. 
DESCRIPTION OF SPECIES. 
1. Homalium densiflorum Spruce; Benth. Journ. Linn. Soc. Bot. 4: 36. 1860. 
Older branches gray, glabrous; younger branches fuscous gray, lenticellate, sparsely 
and finely incurved-puberulous or glabrous; leaf blades 7 to 10 em. long, 3.5 to 4 cm. 
wide, oval or ovate-oval to elliptic-obovate, obtuse or short-pointed and acute at tip, 
rounded to acutely cuneate at base, crenate-dentate with 9 to 15 pairs of obtuse teeth, 
subcoriaceous, in age sparsely incurved-puberulous along costa above or glabrous, 
shining, beneath glabrous or barbellate in the axils, somewhat reticulate-veined, with 
6 to 8 pairs of lateral veins; petioles 6 to 7 mm. long, sparsely incurved-puberulous or 
pilose, at least above; peduncles axillary and terminal, solitary or in pairs, 1 to 2.3 cm. 
long, densely griseous-puberulous with very short spreading hairs or subglabrous; 
inflorescences spicate or racemo-paniculate, slender, 3.5 to 5.5 cm. long, their lower 
branches 1 to 1.5 cm. long and many-flowered, or suppressed, the upper flowers solitary 
and crowded; pedicels 0.5 mm. long or less; fruiting calyx tube turbinate, rounded 
at base, griseous-puberulous; calyx segments 5 or 6, triangular to linear-lanceolate, 
obtusish or acute, 0.8 to 1.2 mm. long, 0.6 to 0.7 mm. wide; fruiting corolla 7 to 8 mm. 
wide; petals ovate, obtusish, griseous-puberulous, 1.8 to 2.4 mm. long, 1.3 to 1.8 mm. 
wide; stamens in fascicles of 3 or 4, the filaments glabrous, equaling or slightly ex- 
ceeding the petals; glands oblate, tomentose-pilosulous; styles 3, glabrous or pilose 
at base, united at base into a glabrous or pilose column nearly or quite as long as 
their free portions; ovary conic or depressed-conic, griseous-villous. 
TYPE LocALITy: Vicinity of Santarem, Pard4, Brazil. 
SPECIMENS EXAMINED: 
Braziu: Vicinity of Santarem, Par4, January, 1850, Spruce (type collection; G). 
Without definite locality, Burchell 7787 (G). 
This species is readily distinguishable by its small subsessile flowers and its very 
small calyx segments, 
2. Homalium guianense (Aubl.) Warb. in Engl. & Prantl, Pflanzenfam. 3%: 36. 
1893. 
Racoubea guianensis Aubl. Pl. Guian. 1: 590. pl. 236. 1775. 
