BLAKE—AMERICAN SPECIES OF HOMALIUM. 233 
Type Locauity: San Pedro Sula, Honduras. 
SPECIMEN EXAMINED: 
Honvuras: Rfo Permejo near San Pedro Sula, Dept. Santa Barbara, altitude 60 
meters, September, 1887, Thieme (J. D. Smith, no. 5227; type, N). 
Homalium hondurense is most closely related to H. columbianum, but is easily dis- 
tinguished by its pubescent leaves, larger petals, and glabrous filaments. 
16. Homalium columbianum Blake, sp. nov. 
Tree, 13 meters high, the trunk 30 cm. in diameter; older branchlets fuscous gray, 
the younger fuscous brown, marked with whitish lenticels, glabrous, slender; leaf 
blades 9.3 to 12.3 em. long, 4.3 to 6 cm. wide, elliptic or oval, short-pointed, with 
obtuse tip, rounded or cuneate at base, comparatively thin, papery-membranaceous, 
undulate-crenate with about 12 pairs of very depressed teeth, glabrous and equally 
green on both sides, not barbellate in the axils, with 6 to 8 pairs of lateral veins; petioles 
glabrous, 7 to 10 mm. long; peduncles axillary and terminal, solitary or in pairs, 
glabrous, 2.5 to 6 cm. long; inflorescences slenderly conic-cylindric, paniculate; rachis 
finely incurved-puberulous, 12.5 to 17 cm. long; lower branches of inflorescence 
(peduncles of the second order) 9 to 15 mm, long, the upper gradually shorter, the 
lower few-flowered, the upper 1-flowered; pedicels puberulous, 1 to2 mm. long; fruiting 
calyx tube turbinate, contracted gradually into a pediform base, griseous-puberulous; 
calyx segments 6 or 7, subulate-lanceolate or subulate, acuminate, puberulous on 
both sides and short-ciliate, 1.5 to 2.3 mm. long, 0.6 to 0.7 mm, wide; corolla 9 to 11 mm. 
wide in fruit, ‘‘white”; petals 6 or 7, ovate, narrowed from near the middle to an 
obtuse tip, griseous-puberulous on both sides and short-ciliate, 3.5 to 4.2 mm. long, 
1,6 to 1.8 mm. wide; stamens 3 or 4 in a fascicle, the filaments pilose to middle, shorter 
than the petals; glands oval-oblong, griseous; styles 3, distinct, hairy at base; ovary 
conic, short-villous. 
Type in the U. S. National Herbarium, no. 537,186, collected at San Martin de Loba, 
Lands of Loba, Department of Bolfvar, Colombia, April to May, 1916, by H. M. Curran 
(no. 21). 
Homalium columbianum. is readily distinguished by its clusters of 3 or 4 stamens 
with filaments pilose to the middle. It is the first species of the genus to be reported 
from Colombia. 
17. Homalium trichostemon Blake, Contr. Gray Herb. n. ser. 53: 60. 1918. 
Tree, 12 metershigh; older branchlets gray-barked, the younger fuscous, dotted with 
whitish lenticels, glabrous; leaf blades 5.7 to 11.5 cm. long, 2.8 to 4.5 em. wide, elliptic 
to oval or obovate-oval, obtuse, short-pointed, or acuminate with blunt or retuse 
tip, cuneate or rounded at base, crenate-repand or crenate-serrate, sparsely pubescent 
at base of midrib above, barbellate in the axils of the veins beneath and sometimes 
obscurely puberulous along midrib and the 7 or 8 pairs of veins, otherwise glabrous, 
reticulate-venose; petioles 4 to 7 mm. long, sordid-pubescent above, glabrous beneath; 
racemes axillary and subterminal, simple, solitary or in pairs, the rachis loosely or 
somewhat densely fowered, puberulous or pilosulous, 6 to 7 cm. long; peduncles 
1.5 to 3.5 cm. long, subglabrous or sparsely puberulous; pedicels 1 to 2 mm. long; 
fruiting calyx tube turbinate, without pediform base, 6 or 7-sulcate, griseous-puberulous; 
calyx segments 6 or 7,ovate-lanceolate,narrowed to an obtusish tip, grisequs-puberulous 
and ciliate, 4 to 4.5 mm. long, 1.5 to 1.8 mm. wide; corolla 11 to 13 mm. wide; petals 
6 or 7, ovate, obtuse, griseous-puberulous and ciliate, 4.8 to 5.5 mm. long, 2.5 to 2.8 
mm. wide; glands griseous-puberulous; stamens in fascicles of 5 to 7, the filaments 
pilose to the middle, shorter than the petals; styles 3, distinct, short-pilose to the 
middle or higher; ovary depressed-conic, griseous-villous. 
Typr LocALtry: Cafetal Montecristo, Department of Pochutla, Oaxaca, Mexico, at 
an altitude of 800 meters. Typein Gray Herbarium, collected April 11 to 12,1917, by 
Conzatti, Reko & Makrinius (no, 3207). 
