180 NORTH AMERICAN FLORA [VoLuME 21 
Leaves densely ferrugino-puberulent when young, glabrate in age 
except along the veins. 9. T. cuspidata. 
Leaves glabrous or nearly so, even when young. 
Leaf-blades broadest at the middle, often elliptic, usually long- 
acuminate at the apex. 
Inflorescence lax, few-flowered; leaf-blades oval or oblong- 
oval. 10. T. potosina. 
Inflorescence dense, many-flowered; leaf-blades mostly nar- 
rowly elliptic. 
Leaf-blades 8-11 cm. long; bracts about 1 mm. long. 11. T. costaricana, 
Leaf-blades 7.5 cm. long or less; bracts 1.5-3.5 mm. long. 12. T. linearibracteata. 
Leaf-blades mostly broadest above the middle, never elliptic nor 
long-acuminate. 
Staminate perianth 6-7 mm. long, nearly glabrous. 13. T. Dussii. 
Staminate perianth 3.5-5 mm. long, copiously puberulent, 
Stamens usually 9; leaf-blades thick. 14. T. coriifolia. 
Stamens 6-8; leaf-blades thin. 
Flowers solitary in the cymes, long-pedicellate, densely 
puberulent. 15. T. panamensis. 
Flowers glomerate in the cymes, sessile or very short- 
pedicellate, sparsely puberulent. 
Lateral nerves of the leaves numerous, with numer- 
ous fine, conspicuously reticulate veinlets. 16. T. fragrans. 
Lateral nerves of the leaves few, 6-9 on each side, 
distant, the intermediate veinlets inconspicuous. 17. T. Harrisiana. 
1. Torrubia suborbiculata (Hemsl.) Britton, Bull. Torrey Club 
31: 613. 1904. 
Pisonia obtusata Heimerl, Bot. Jahrb. 21: 624, in part. 1896. Not P. obtusata Jacq. 1798. 
Pisonia suborbiculata Hemsl.: Duss, Ann. Inst. Colon. Marseilles 3: 62. 1897. 
Low shrub, 2.5 meters high or less, the branches stout, rugulose, grayish or yellowish, 
the branchlets stout or slender, sparsely puberulent when young but soon glabrate, the inter- 
nodes 0.2—2 cm. long; leaves opposite, subequal or very unequal, the petioles stout, 1-2 mm, 
long, 1 mm. thick, the blades orbicular, rounded-oval, or oval, 1.6-3.5 cm. long, 1.1-2.5 cm. 
_ Wide, rounded or obtuse at the base, broadly rounded or rarely only obtuse at the apex, cori- 
aceous, glabrous, the margins often slightly revolute, the lateral veins prominent beneath, 
4-6 on each side, anastomosing near the margins, the veinlets prominent, coarsely reticulate; 
staminate peduncles 1.3-2.5 cm. long, very slender, sparsely puberulent or glabrate, the in- 
florescence few-flowered, cymose, 1.5 cm. broad, the flowers mostly solitary, on pedicels 0.5—2 
mim. long, the bractlets linear or oblong, sparsely puberulent, the perianth tubular-funnelform, 
2-2.5 mm. long, glabrous, the lobes short, obtuse; pistillate peduncles 1.2-2.2 cm. long, slender, 
sparsely puberulent or glabrate, the inflorescence subcorymbose, 1.5-2 cm. broad, few-flowered, 
lax, the branches opposite or alternate, short, glabrate, the flowers solitary, on pedicels 1—4 
mim. long, the bractlets linear or linear-oblong, 1 mm. long, obtuse, glabrous or nearly so; 
fruit ellipsoid-oblong, 8 mm. long and 3 mm. in diameter, red and glaucous at maturity, the 
utricle finely striate; seed ellipsoid, 6 mm. long, dark-brown, finely striate. 
TyPr LocaALity: Martinique. 
DISTRIBUTION: Martinique. 
2. Torrubia ligustrifolia (Heimer!) Standley, Contr. U. S. Nat. 
Herb. 18: 100. 1916. 
Pisonia ligustrifolia Heimerl, Symb. Ant. 7: 507. 1913, 
Branches slender, grayish, substriate, the internodes 0.9-5.2 cm. long, the branchlets at 
first sparsely rufo-hirtellous, soon glabrate; leaves opposite, subequal, the petioles 5 mm. long 
or less and 2 mm. thick, glabrous, the blades elliptic, 4.4-7.2 cm. long, 1.9-3.3 mm. wide, 
usually widest at the middle and slightly more than twice as long as wide, nearly equally 
rounded at both ends, thick-coriaceous, concolorous, dull or sublustrous, glabrous, the margins 
revolute, the midvein very prominent beneath, the lateral veins numerous, slender, straight, 
connected by numerous reticulate veinlets; pistillate peduncles 3 cm. long, stout, glabrate, 
the inflorescence corymbose, many-flowered, the primary branches trichotomous, very sparsely 
rufo-hirtellous or glabrate, the flowers solitary, subsessile or on pedicels 2 mm. long or shorter, 
