PITTIER—-PLANTS FROM COLOMBIA AND CENTRAL AMERICA. 229 
impressed, often pilosulous, and the (4 to 6) main veins prominulous above, 
glabrous, opaque, more or less rusty-colored, the costa and veins sharply prom- 
inent beneath; margin entire or remotely denticulate on the upper half of the 
blade. Floral rachis slender, about 15 cm. long, brownish-pubescent, axillary 
at the end of the branchlets; flowers not known. Follicles elliptic, compressed, 
stipitate, short-mucronate, minutely and sparsely pubescent; pedicel 4 mm., 
stipe about 7 mm. long; body of the follicle 28 to 3.2 em. long, 1.2 cm. broad; 
remnant of the style not over 2 mm. long. Seeds (2 in each follicle) cordate, 
dark brown, minutely pilosulous, surrounded with a membranous, ovate-elliptic, 
pinkish wing, the whole 2.7 to 2.9 cm. long, about 1 cm. broad. 
Type in the U. S. National Herbarium, no. 678256, collected at Cana, southern 
Darién, Panama, fruits, April to June, 1908, by R. S. Williams (no. 739). 
Collected also on the banks of Pirre River, southern Darién, Panama, young 
ghoot only, June, 1914, by H. Pittier (no. 6975). 
Roupala darienensis is closely related to a plant of Santa Marta, determined 
as R. gardneri (but certainly not Meisner’s species), and to R. panamensis. 
It differs from both in pubescence, length of the spikes, and leaf characters, and 
from the latter in the large size of the adult tree. See notes under Roupale 
panamensis below. 
Roupala glaberrima Pittier, sp. nov. 
A tree, entirely glabrous. Leaves entire, thick, flat, coriaceous, the petioles 
slightly flattened, 2.5 to 3 cm. long, the blades ovate-elliptic, cuneate-attenuate 
at the base, obtusely acuminate at the apex, 4.5 to 7 cm. long, 2 to 4 em. broad, 
lustrous and reticulate above, the costa, veins, and venules slightly prominent, 
opaque, the costa and veins hardly visible beneath; margins more or less rev- 
olute. Racemes axillary or subterminal, the rachis rather thick, 10 to 21 cm. 
long; flowers numerous; pedicels single or geminate, when the latter free to 
the base, about 4 mm. long; sepals linear-oblong, rounded at the apex, 12.5 mm. 
long, 1.38 mm. broad at the broadest place near the apex, the upper margins 
inflexed (involute), with a beaked mucro at the apex; stamens inserted on the 
upper half of the sepals, the filaments very short (0.2 to 0.56 mm. long), the 
anthers linear-oblong, 2.5 to 3.5 mm. long; disc scales 4, ovate, nearly 0.5 mm. 
long; pistil 11.5 mm. long, the ovary ovoid-oblong, the style clavate and sulcate 
at the upper part, with a truncate apex. 
Type in the U. S. National Herbarium, no. 579868, collected along the 
Ciruelas River above Barba, Costa Rica, flowers, March 15, 1890, by A. Tonduz 
(Inst. Fis. Geogr. Costa Rica, no. 2228). 
While in Costa Rica, I identified this specimen, with doubt, as Rk. nitida 
Rudge, a species of French Guiana, but I now find that it differs from that in 
the texture and size of the leaves, the proportional length of these and the 
racemes, the dimensions of the sepals, ete. From R. loranthoides Klotzsch, of 
Guatemala, which, also, is said to be entirely glabrous, it departs in the larger 
flowers, the shape of the disc scales, and other minor details. 
Roupala panamensis Pittier, sp. nov. 
A small tree, the young branchlets glabrous or glabrescent. Leaves coria- 
ceous, flat, the petioles 2 to 5 cm, long, thicker at the base, narrowly marginate, 
flattened above, hairy on the upper side at the base, sparsely sealy, the blades 
ovate to elliptic, rounded-cuneate and decurrent at the base, long and acutely 
acuminate at the apex, 6.5 to 11 cm. long, 2.5 to 5 cm. broad, glabrous on both 
sides, pale green above, paler, minutely punctulate, and reticulate beneath, the 
main veins (7 or 8) prominent above, the costa, veins, and venules prominent 
beneath; margins entire on the lower half of the blade, remotely sinuate- 
toothed or serrate on the upper half. Floral spikes axillary or on defoliate 
