166 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
Lucuma sclerocarpa Pittier, sp. nov. PuateE 80. Fiaure 91, 
Section Macroluma. A large tree, about 25 meters high, lactescent. Trunk usu- 
ally straight, 30 to 40 cm. in diameter at base; bark smooth, grayish. Young twigs 
sparsely ferruginous-pubescent, slightly sulcate. 
Leaves alternate, petiolate, entire, membranous. Petiole about 1.5 cm. long, 
rather thick, broadly canaliculate, at first puberulous. Leaf blades ovate-elliptic or 
elliptic, 10 to 25 cm. long, 4 to 9 cm. broad, rounded and subdecurrent at the base, 
acuminate witha rounded tip, glabrous and pale green above, sparsely villous, lighter 
and slightly brownish beneath. Nervation pinnate, interreticulate, slightly promi- 
nent above, more so beneath, the costa and veins also sparsely hairy beneath; primary 
veins alternate, 18 to 20 on each side of the costa. 
Flowers pedicellate, in clusters of 3 to 6 on the defoliate axils of the last year’s 
growth. Bracts very small, ferruginous-pubescent. Pedicels 1 to 3 mm. long, scarious- 
pubescent, mostly bearing at the base 2 minute, ovate, clasping bractlets. Sepals 
6, free, the 2 exterior ones ovate, half smaller and completely scaly-pubescent outside, 
the 4 interior ones also ovate, 5 to 6 mm. long, pubes- 
cent outside on the exposed parts only, ciliate on 
the scarious margin, and silky hairy inside. Corolla 
about 8 mm. long, glabrous, yellowish white, with 
a broad tube and 5 irregularly rounded, subtruncate 
lobes about 3 mm. long. Staminodes alternating 
with the corolla lobes, free, more or less ovate, sub- 
auriculate at the base, narrowing into an irregularly 
truncate tip. Stamens very short (1.5 to 2 mm. 
long), glabrous; filaments rather thick and broader 
at base; anthers basifix, ovate, more or less emargi- 
nate or subhastate at the base. Pistil about 7 mm. 
long; ovary ovoid, 5-celled, densely hairy; style 
smooth, slightly exserted, more or less distinctly 
divided at the tip into 5 minute, papillose lobules. 
Fruit a sclerous, sessile, ovate, obscurely sulcate 
¥1G. 91.—Lucuma sclerocarpa. a,Flo- berry, attenuate at the base, yellowish and hard at 
ral bud, showing calyx; 6, corolla maturity, 7 cm. long and 4.5 cm. in diameter. Seed 
spread open, with stamens and oyoid, about 4 cm. long and 2.5 cm. in diameter, 
staminodes; c, pistil and cross see- } town, shiny, the umbilical area very large and 
tion of ovary. Scale 3. . . 
extending from one end to the other, the extremity 
of the area opposite the hilum bearing a small, salient, ovate scutellum. 
Type in the United States National Herbarium, no. 679508, collected along the 
Sperdi Creek, near Puerto Obaldfa, San Blas Coast, Panama, flowers and fruits, Sep- 
tember 3, 1911, by H. Pittier (no. 4357), with photograph of fruit. 
This species is a near relative of Lucuma procera Mart., with which it has in common 
the bracteolate pedicels, the sepals hairy inside, and the general characters of the sec- 
tion Rivicoa. But it differs in the shape and size of the leaves, the much shorter fila- 
ments of the stamens, and the shape of the staminodes, and probably in its ligneous or 
coriaceous fruit, a feature not yet signalized, I think, in this genus. It is a subgre- 
garious species, apparently common in the forests of the San Blas Coast. 
EXPLANATION OF PLATE 80.—Fruits, San Blas Coast, Panama. Material from same tree as floral speci- 
mens. Natural size. 
Lucuma standleyana Pittier, sp. nov. FigurRE 92. 
Section Guapeba. A small tree, 4 to 5 meters high, with a slender trunk and 
scanty, diffuse branching. Bark brownish gray, rugose. 
Leaves clustered at the ends of the branchlets, oblong, gradually cuneate-attenuate 
at the base into a broad petiole 6 to 8 mm. long, short-acuminate at the tip, 7 to 20 
