172 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
The leaves of these specimens are uniformly rounded at the base and ovate and 
more or less acute at the tip, while those of the type are described as **obovato- 
oblongis basi angustatis.’’ Moreover the racemes appear to be single and not 
geminate. But these small differences would not, apparently, justify the separation 
of the Jambal6 form as a new species. 
Phyllonoma tenuidens Pittier, sp. nov. Figure 11. 
A bushy tree, 2 to 3 meters high, with erect, glabrous limbs and branchlets. Older 
branchlets longitudinally striped with brownish white, irregular bands apparently 
due to the splitting of the dark brown bark. 
Foliage very dense. Leaves alternate, exstipulate, glabrous: petioles canaliculate, 
slender, 7 to 10 mm. long. Leaf blades 5 to 7 cm. long, 2 to 3 em. broad, elliptic, 
cuneate, long-acuminate, rather thin, discolorous: primary vein prominent under- 
ry 
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Fia. 11.—F lower parts and tooth of leaf of Phyllonoma tenuidens. a, Segment of leaf with tooth; b, 
floral bud; ¢, lobe of calyx; d, petal; e, stamen; /, style; g, seed. a, Natural size; b-g, scale 18. 
neath, the secondary ones very slender, regular, minutely anastomosing, apparent on 
both faces; margin revolute, serrate from near the base by numerous regular and 
very slender teeth. 
Inflorescence inserted on the blade, 1 cm. or more from the base of the acumen, 
cymose, and generally formed of 2 clusters of 4 flowers cach on very short, squamose 
peduncles. Bracts at base of pedicels broadly ovate and subulate. Pedicels of 
mature flowers pubescent, seldom over 1.4 mm. long. Prefloration valvate. 
Flowers very small. Sepals glabrous, broadly triangular, about 0.5 mm. long, 
with one minute tooth on each side. Petals 1.4 mm. long, 1 mm. broad, lanceolate- 
acuminate, yellow. Stamens 1 to 1.2 mm. long, filaments broader at base: cells of 
the anthers ovate, full. Hornlike styles about 0.5 mm. long. 
Usually a single, small, pedicellate berry at each inflorescence, the diameter about 
4.5 mm., the length 5.5 mm. Seeds usually 5 in each berry, ovate or ovate-elongate, 
about 1.5 to 2 mm. long, reddish brown, densely covered with conical tubercles. 
Costa Rica: Cuesta de los Borucas, on the mountain road leading from San Marcos 
de Dota to the Diquis Valley, altitude 2,900 meters; H. Pittier, flowers and fruit, 
January, 1897 (Instituto ffs.-geog. Costa Rica, no. 10552; type U. 8. National 
Herbarium no. 578896). 
