PITTIER—-PLANTS FROM COLOMBIA AND CENTRAL AMERICA. 481 
two of them have been placed in the wrong genus and should be re- 
ferred to Labatia, as they have hairy fruits and a calyx formed by 
two pairs of sepals. These are my Lucuma standleyana and L, sam- 
buensis2° The mistake was due to the incompleteness of the speci- 
mens at my disposal, aided no doubt by my being unfamiliar with 
a genus not known before to exist in Central America. 
Lately two new species of Lucuma have been recognized in the 
unnamed part of my collection, and these are described below. The 
number of species reported from Central America thus remains at 
five, of which two have almost always pentamerous flowers, two have 
hexamerous flowers with 8 or 9-celled ovaries, and the remaining one 
has 6 sepals but is pentamerous in the other parts of the flower. 
This last species, L. sclerocarpa, 1s remarkable also on account of its 
sclerotic fruits, which are perhaps unique in the genus. 
The chief distinguishing characters of these five species are brought 
together in the following key. 
Fruit selerotic, pyriform, one-seeded, Sepals 6; corolla, androecium, and 
ovary pentamerous. (Panama. )-~------- _------- 1. L. sclerocarpa Pittier. 
Fruit berry-like, with a fleshy mesocarp. 
Ovary 8 to 9-celled; sepals and corolla lobes 6. Primary veins of the leaves 
12 to 15. 
Corolla 14 to 14.5 mm. long, hairy within. (Panama.) 
2. L. glabrifolia Pittier. 
Corolla 11.5 to 12 mm. long, glabrous within. (Guatemala.) 
3, L. laeteviridis Pittier. 
Fruit depressed-globose, 1 to 5-seeded, the ovary 5-celled. (Costa Rica ; 
cultivated.) _--_-----------------+---------- 4. L. obovata H. B. K. 
Fruit fusiform, truncate at the base, obtusely attenuate at the apex, 
1-seeded, the ovary 6-celled. (Central America.) 
5. L. salicifolia H. B. Ks. 
This key does not complete the possible list of species of Lucuma 
in Central America. Up to 1910, when I started studying this inter- 
esting group, about 8 species of Sapotaceae had been reported from 
the region between the Isthmus of Tehuantepec and that of Darién. 
To-day 27 species are listed. 
Lucuma glabrifolia Pittier, sp. nov. 
A small tree with pyramidal crown; branchlets glabrous; leaf buds minutely 
ferruginous-pubescent. 
Leaves membranous, congested on the new growth at the ends of the branch- 
lets, glabrous, the petioles slender, semiterete, 2 to 3 cm. long, the blades obo- 
vate, long-cuneate at the base, abruptly and shortly obtuse-acuminate at the 
apex, 11 to 20 cm. long, 4 to 8.5 cm. broad, light green and lustrous above, paler 
and dull beneath, entire, the primary veins 12 to 15, light colored when dry, 
conspicuous but neither impressed nor prominent above, prominent (like the 
costa) beneath, the intervenal spaces minutely reticulate. 
Flowers pedicellate, rather short and broad, in clusters of 3 to 5 at the ends 
of the branchlets; basal bractlets small, hairy, deciduous ; pedicels minutely 
®Tabatia standleyana Pittier. Lucuma standleyana Pittier, Contr, U. 5. 
Nat. Herb. 18: 166. 1916. Labatia sambuensis Pittier. Lucuma sambuensis 
Pittier, Contr. U. S. Nat. Herb. 18: 167. 1916. 
