190 NORTH AMERICAN FLORA [VoLumE 21 
green, glabrous or nearly so; staminate perianth narrowly campanulate, 5 mm. long, minutely 
puberulent, 5-dentate, the teeth obtuse; pistillate flowers and fruit not known. 
TYPE Locality: Los Verdes, Department of Amatitlan, Guatemala, at an altitude of 1050 
meters. 
DISTRIBUTION: Known only from the type locality. 
8. Pisonia rotundata Griseb. Cat. Pl. Cub. 283. 1866. 
Pisonia subcordata rotundata Heimerl, Bot. Jahrb. 21: 630. 1896. 
A spreading shrub, I-1.5 meters high, or a small tree, 6 meters high or less, the branches 
stout, gray or brown, the branchlets stout, densely ferrugino-puberulent or tomentulose when 
young, glabrate in age, densely leafy, the internodes very short; petioles stout, 2-9 mm. long; 
leaf-blades broadly obovate-oval, oval-oblong, or rounded-oval, 2-6 cm. long, 1.5—4.5 cm. wide, 
rounded or obtuse at the base, broadly rounded and usually shallowly emarginate at the apex, 
coriaceous, grayish-green above and glabrous or sparsely puberulent, slightly paler beneath 
and puberulent or hirtellous, usually densely so when young but sometimes glabrate in age, 
the margins revolute, the lateral veins prominent beneath, 5-9 on each side, divergent at an 
angle of about 60°; peduncles stout, 1.5-3.5 em. long, densely puberulent or ferrugino-hirtellous, 
or rarely glabrate; staminate cymes 2~3.5 em. broad, dense, the branches ascending, the 
flowers short-pedicellate or sessile, the bractlets minute, the perianth campanulate, 3 mm. 
long, sparsely or densely puberulent; stamens usually 8, nearly twice as long as the perianth; 
pistillate cymes 4-6 cm. broad, loosely divaricate-branched, the flowers on pedicels 2-9 mm. 
long, the bractlets linear, 1 mm. long or shorter, puberulent, the perianth tubular, 3.5—-4 mm. 
long, densely puberulent; fruit clavate, about 8 mm. long, 5-angled, rounded at the apex, 
densely puberulent, the angles each bearing a row of low uniseriate glands. 
TYPE LOCALITY: Near Hanabana, Cuba. 
DisTRIBUTION: Florida keys; Bahamas, Cuba, and the Isle of Pines. 
9. Pisonia albida (Heimerl) Britton. 
Pisonia subcordata typica albida Heimerl, Bot. Jahrb. 21: 630. 1896. 
Pisonia subcordata iypica gigantophylla Heimer}, Bot. Jahrb. 21: 630. 1896. 
Pisonia subcordata albida Heimerl, Symb. Ant. 4: 226. 1905. 
Branches stout, gray, the branchlets grayish-puberulent when young but soon glabrate, 
densely leafy; petioles 1.1-2 cm. long, stout; leaf-blades oblong, oval, or rounded-oval, 4.5-11 
cm. long, 2.5-6.5 cm. wide (rarely up to 26 cm. long and 18 cm. wide on young shoots), rounded 
or obtuse at the base, broadly rounded at the apex or rarely obtuse, subcoriaceous, grayish- 
green above and glabrous or nearly so, paler beneath and cinereo-tomentulose, or glabrate in 
age, the margins plane, sometimes undulate, the lateral veins prominent beneath, ascending 
at an angle of 45-60°, nearly straight, the veinlets finely reticulate; peduncles 1-3 cm. long; 
staminate cymes 2~—3.5 cm. broad, dense or rather open, the branches grayish-puberulent, the 
flowers short-pedicellate, the bractlets minute, the perianth campanulate, 3 mm. long, puberu- 
lent, 5-dentate, the teeth short, obtuse; stamens usually 8, about twice as long as the perianth; 
pistillate cymes open, divaricate-branched, the pedicels 2-15 mm. long, the bractlets minute; 
fruit (immature) 6-7 mm. long, clavate, 5-angled, densely puberulent, the angles each bearing 
a row of short uniseriate glands above the middle. 
TYPE LOCALITY: Porto Rico. 
DISTRIBUTION: On dry limestone hillsides and in sandy coastal thickets, Porto Rico. 
10. Pisonia subcordata Sw. Prodr. 60. 1788. 
Pisonia nigricans West, Bidr. St. Croix 312. 1793. Not P. nigricans Sw. 1800. 
Pisonia subovata Poir. in Lam. Encyc. 5: 347. 5 
Pisonia subcordata Swartziana Heimerl, Bot. Jahrb. 21: 630. 1896. 
Tree, 10-20 meters high, the branches stout, gray or brownish, the branchlets stout, 
ferrugino- or grayish-puberulent when young but soon glabrate, the internodes short; petioles 
slender or stout, 1-3 cm. long, glabrous or nearly so; leaf-blades suborbicular to broadly oval, 
5.5-13.5 cm. long, 4.5-10.5 cm. wide, usually subcordate at the base but sometimes rounded, 
often unequal, usually broadly rounded at the apex but sometimes obtuse or shallowly emar- 
