248 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
substipitate, 5-angled, pilosulous. Fruit glabrous, fusiform, 5-winged, about 
16 mm. long and 17 mm. in diameter, including the wings. 
Type in the U. S. National Herbarium, no. 577731, collected near Nicoya, 
Costa Rica, in thickets, flowers, January, 1900, by A. Tonduz (Inst. Fs. 
Geogr. Costa Rica, no. 18503). No, 16982 of this series is the same species from 
the same locality. 
Combretum punctulatum Pittier, sp. nov. 
A thorny, climbing vine, the branchlets terete, brownish-pubescent. Leaves 
alternate, membranous, the petioles terete, brownish-pubescent, 3 to 5 mm. 
long, the blades ovate, rounded at the base, long-acuminate and mucronate 
at the apex, 5 to 8 cm. long, 2.5 to 3.2 cm. broad, glabrous and dark green 
above, paler beneath, the costa and veins sparsely pubescent, and the axils 
of the veins barbellate. Inflorescence broadly paniculate, the rachis pubescent 
and sparsely dotted with minute dark glands, the larger branches alternate 
and subtended by normal leaves, the secondary branches subopposite, with 
small, lanceolate, sparsely hairy, caducous bractlets, these about 4 mm. long. 
Flowers numerous, alternate or subopposite, the bractlets lance-subulate, 
shorter than the ovary; calyx campanulate, 5-lobate, about 2.5 mm. long, 
glabrous without, except at the minutely hairy apex of the lobes, long-hairy 
inside at the insertion of the stamens; petals 5, sessile, obovate-oblong, 1.8 
to 2 mm. long, 0.8 mm. broad, white, more or less hairy and ciliate, especially 
toward the apex; disc tubular, surrounding the base of the style, 0.2 to 0.3 mm. 
high, bearing a crown of stiff hairs about 0.5 mm. long; ovary fusiform, sub- 
stipitate, 5-angled, 1.5 to 1.7 mm. long, sparsely brownish-pubescent and dotted 
with minute dark glands; style glabrous, subulate, about 5.5 mm. long. 
Type in the U. S. National Herbarium, no. 679085, collected along the Trini- 
dad River, Canal Zone, Panama, flowers, July 19, 1911, by H. Pittier (no. 4002). 
This differs from C. alternifolium in having its leaves pubescent on the 
costa and veins beneath, and the ovary also pubescent and covered with 
darkish glandules, 
MELASTOMATACEAE. 
AN OLD AND A NEW SPECIES OF MICONIA. 
Miconia darienensis Pittier, sp. nov. 
Section Eumiconia, subsection Paniculares. A tree up to 20 meters high, 
the trunk 40 cm. in diameter; bark gray or reddish gray, smooth; crown elon- 
gate, with ascending limbs; young branchlets very short, obscurely tetragonous, 
sparsely puberulous. 
Leaves membranous, entire, glabrous, the blade trinervate from above the 
base and with inconspicuous marginal pseudo-nerves. Petioles 0.5 to 1 cm. 
long, rather thick, slightly canaliculate and puberulous. Leaf blades 8 to 24 
cm. long, 2 to 5 em. broad, elliptic-lanceolate, acute at base and more or less 
obtusely acuminate at the apex, dark green above, paler beneath. Lateral 
nerves starting at about 1 cm. from the base of the lamina; transverse veins 
almost perpendicular to the costa (angle about 84 degrees). 
Panicles terminal, about 10 cm. long, ,ovoid-globose or pyramidal, the sec- 
ondary branches, except at the basal node, 4 to each node, 2 of these being 
short and simple and 2 longer and again branched. Rachis of the panicle 
glabrous or slightly puberulent. Flowers pentamerous, pediceled, about 7 mm. 
long (including pedicels), clustered at the ends of the ultimate branches of 
the rachis. Pedicels 1 to 1.5 mm. long, slender, glabrous. Calyx campanulate, 
