SEPT. 19,1923 KILLIP: NEW URTICACEAE FROM COLOMBIA 309 
P. mollis Wedd., though it is readily distinguishec from that species by its 
shorter, more deeply cut leaves, its shorter peduncles, and the elongate lobes 
of the staminate flowers. 
Pilea obetiaefolia Killip, sp. nov. 
Plants monoecious (?), erect, herbaceous, about 30 cm. high; stems glabrous 
or the younger branches sparingly hirsutulous. Stipules ovate-lanceolate, 
8 mm. long, 3 mm. broad, hyaline at margin, copiously covered with fusiform 
eystoliths on the outer surface. Petioles hirsutulous. Leaf blades oblong- 
lanceolate, short-acuminate at apex, subcuneate or rounded at base, crenate- 
serrate (teeth obtuse, 20 to 25 on a side), penninerved, dark green above, 
yellowish green beneath, bearing fusiform cystoliths on both surfaces; leaves 
of a pair similar in shape but slightly unequal in size, the larger 7 to 10 em. 
long, 2 to 4 cm. wide, with petioles 3 to 4 em. long, the smaller 5 to 8 cm. long, 
2 to 2.5 cm. wide, with petioles 1.5 to2 cm. long. Pistillate flowers borne in 
compact cymes 6 to 7 mm. wide on peduncles 5 to 6 mm. long; achenes broadly 
ovate, 2 mm. long, obtuse. 
Type in the U.S. National Herbarium, no. 1,140,924, collected in a moist 
forest along the Rio San Rafael, below Cerro Tatama, Department of Caldas, 
Colombia, altitude 2,600 to 2,800 meters, September 7 to 11, 1922, by F. W. 
Pennell (no. 10374). 
The species is characterized by large penninerved leaves similar to those of 
the genus Obetia. Its exact relationship to other species of Pilea is difficult to 
determine. The difference in size of the leaves at a node is not sufficiently 
great to refer it to the section Heterophyllae, while the pubescence of the stem 
and petioles, though slight, excludes it from the section containing glabrous 
species. Probably it is best placed in the section Pubescentes Brevipedun- 
culatae, where apparently it is the only species with penninerved leaves. 
Boehmeria coriacea Killip, sp. nov. 
Suffrutescent, 40 to 50 cm. high, dioecious; stems woody toward base, 
strigose and hispidulous, becoming glabrate. Stipules ovate-lanceolate, 4 to 
5mm. long, acute. Petioles0.5to1.5cem.long. Leaf blades ovate or elliptic- 
ovate (the alternate leaves very unequal, the larger 5 to 9 cm. long, 3 to 4 cm. 
wide, the smaller 1.5 to 2.5 em. long, 1 to 2 em. wide), acuminate at apex, 
cuneate or subrotund at base, 3-nerved (lateral nerves extending to upper 
third of blade, a secondary pair of nerves reaching to apex), serrate (teeth 
acutish), thick, coriaceous, strongly rugose-bullate, above silvery gray and 
glabrous, beneath green, densely appressed-strigose on the nerves and veins 
and hispidulous. Staminate plants not seen. Pistillate flowers in axillary 
glomerules 5 to 9 mm. wide; perianth broadly ovoid, 1 mm. long, 0.8 mm. in 
diameter, sparingly strigillous; style 1.2 mm. long, densely hirsute; achenes 
orbicular, slightly wing-margined toward apex, acute at both ends. 
Type in the U. 8S. National Herbarium, no. 1,140,931, collected in moist 
forest along the Rio San Rafael, below Cerro Tatama, Department of Caldas, 
Colombia, altitude 2,600 to 2,800 meters, September 7 to 11, 1922, by F. W. 
Pennell (no. 10381). 
Boehmeria coriacea is distinguished from its nearest ally, B. celtidifolia 
H. B. K., by its broader leaves with glabrous upper surface and shorter, more 
nearly globose pistillate flowers. Boehmeria celtidifolia is a shrub, while B. 
coriacea is herbaceous. 
