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290 JOURNAL OF THE WASHINGTON ACADEMY OF SCIENCES VOL. 13, No. 13 
It is with a peculiar sense of pleasure and satisfaction that I am able 
to associate with one of the important trees of Salvador the name of a 
valued personal friend who is a true scientist in every sense of the word 
and who has done so much to make known the flora of one of the Cen- 
tral American countries of which practically no information was 
available previously. My pleasure in naming this genus is enhanced 
by the fact that itis thus possible to express, although very inade- 
quately, an appreciation of the generous attentions and courtesies 
received from Dr. Calderon during a visit of five months to Salvador, 
attentions which contributed in a large measure toward making those 
months a delightful experience. 
Calderonia Standl., gen. nov. 
Trees, nearly glabrous throughout. Leaves opposite, petiolate, large, 
thin, deciduous. Stipules large, interpetiolar, caducous. Inflorescence 
terminal, the flowers small, cymose-paniculate, bracteate and bracteolate, 
sessile or short-pedicellate; hypanthium clavate, terete; calyx very shallowly 
5-lobate but ruptured by the expanding corolla, persistent; corolla fleshy- 
coriaceous, funnelform-campanulate, the tube short, campanulate, the 5 
lobes oblong-ovate, obtuse, nearly equaling the tube, glabrous outside, 
pubescent within, recurved, valvate in bud. Stamens 5, alternate with 
the corolla lobes, inserted at the base of the tube; filaments stout, pubescent 
below, exserted; anthers oblong, obtuse, dorsifixed near the base, dehiscent 
by antrorse slits. Disk annular, fleshy. Ovary 2-celled; style stout, glab- 
rous, exserted, the 2 branches clavate and angulate; ovules numerous, 
crowded, attached to the septum. Capsule globose, ligneous, 2-celled, 
loculicidally bivalvate from apex nearly to base, the septum also vertically 
dehiscent. Seeds numerous, large, horizontal, semiorbicular, compressed, 
terminating in a thin transparent wing as large as the body, the testa 
minutely reticulate; embryo large, the radicle minute, the cotyledons oval, 
thin; endosperm none. 
Type species, Calderonia salvadorensis Standl. 
Calderonia salvadorensis Standl., sp. nov. 
A tree, 5-15 meters, high, the trunk slender, with smooth whitish bark; 
young branchlets minutely puberulent; stipules linear-lanceolate, long- 
attenuate, about 2 cm. long, glabrous; petioles slender, 2-3 cm. long, minutely 
puberulent; leaf blades elliptic to oval-elliptic or oblong-obovate, 12-24 cm. 
long, 5.5-12 em. wide, acute or short-acuminate, somewhat narrowed to 
the rounded or emarginate base, thin, puberulent beneath along the nerves, 
in the axils of the main nerves barbate and domidiate (furnished with small 
shelters—for parasites?), elsewhere glabrous, the lateral nerves 10-12 pairs; 
panicles 8-15 em. long, often leafy below, dense, many-flowered, the rachis 
minutely puberulent, the flowers mostly sessile; hypanthium glabrous, 
3 mm. long; calyx 1.5 mm. long, the lobes rounded, minutely ciliolate; corolla 
5 mm. long; filaments about equaling the corolla lobes, the anthers 2.56 mm. 
long; capsule slightly depressed, about 2 ecm. in diameter, with numerous 
large pale lenticels; seeds (including the wing) about 15 mm. long and 6 mm. 
wide. 
