14 NORTH AMERICAN FLORA [VOLUME 32 
6. ISIDOREA A. Rich.; DC. Prodr. 4: 405. 1830. 
Shrubs, the branchlets terete. Leaves opposite, petiolate, the blades narrow, rigid, 
pungent, the margins revolute. Stipules intrapetiolar, subulate, pungent, persistent. Flowers 
solitary, axillary and terminal, sessile or pedicellate, bracteate or ebracteate; hypanthium tur- 
binate, acutely 5-costate; calyx 5-lobate, the lobes erect, narrow, costate, persistent; corolla 
tubular, 5-angulate, the angles thickened, glabrous within, the limb 5-lobate, the lobes short or 
elongate, imbricate or induplicate-valvate, the margins thickened. Stamens 5, inserted at the 
base of the corolla; filaments filiform, coherent at the base and villous; anthers dorsifixed near 
the base, elongate-linear. Disk swollen. Ovary 2-celled; style filiform, the 2 branches linear, 
obtuse; ovules numerous, crowded, horizontal, on placentae longitudinally attached to the 
septum. Capsule obovoid-turbinate, 5-angulate, woody, truncate, 2-celled, septicidally 
bivalvate, the valves bifid. Seeds numerous, horizontal, compressed, angulate, stipitate 
by ashort aril, the testa coriaceous, granulate; endosperm fleshy; embryo small, the cotyledons 
suborbicular, the radicle terete. 
Type species, Jsidorea amoena A. Rich. 
Leaf-blades 2—5 cm. long, broadest at the middle; flowers pedicellate. 
Corolla-lobes broadly triangular, about 4 mm. long, the tube 2.5-3 cm. long, 
6-7 mm. thick. 1. J. pungens. 
Corolla-lobes narrowly ovate, about 12 mm. long, the tube 2 cm. long, 1.5 mm. 
thick. 2. I. leptantha. 
Leaf-blades 0.7—1.4 cm. long, broadest at the base; flowers sessile or nearly so. 3. I. cubensis. 
1. Isidorea pungens (Lam.) B. I. Robinson, Proc. Am. Acad. 
45: 401. 1910. 
Ernodea pungens Lam. Tab. Encye. 1: 276. 1791. 
Ernodea pedunculata Poir. in Lam. Encyce. Suppl. 2: 581. 1811. 
Tsidorea amoena A. Rich.; DC. Prodr. 4: 406. 1830. 
Shrub; branches grayish, the branchlets slender, scaberulo-hirtellous; stipules 5-15 mm. 
long, subulate, dilated at the base, rigid and spine-like, glabrous or puberulent, stramineous; 
petioles about 1 mm. long, broad, compressed; leaf-blades linear-oblong or narrowly lanceolate, 
2—5 cm. long, 2.5-8 mm. wide, obtuse or acutish at the base, acute at the apex and spine-tipped, 
rigid-coriaceous, glabrous and grayish-green on the upper surface, shallowly sulcate along the 
costa, paler beneath, glabrous or scaberulous, the costa very prominent, the lateral veins 
obscure, very numerous, parallel, ascending at a very acute angle, the margins strongly re- 
volute; pedicels slender, 4-8 mm. long, scaberulo-hirtellous, the bractlets slender-subulate, 
borne at the middle, or wanting; hypanthium 2.5—4 mm. long, scaberulous; calyx-lobes linear- 
subulate, 10-15 mm. long, glabrous, pungent; corolla purplish-red, the tube 2.5—3 cm. long, 
6-7 mm. thick, the lobes 4-5 mm. long, broadly triangular, obtuse, induplicate-valvate; cap- 
sule broadly turbinate, about 1 cm. long and broad, glabrous, the angles thin and wing-like; 
seeds brown, 1.5—2.5 mm. long, finely and densely tuberculate. 
TYPE LOCALITY: [Hispaniola]. 
DISTRIBUTION: Hispaniola. 
ILLUSTRATIONS: Mém. Soc. Hist. Nat. Paris. 5: pl. 25; E. & P. Nat. Pfl. 44: f. 7, F, G. 
2. Isidorea leptantha Urban, Symb. Ant. 7: 391. 1912. 
Shrub; branches grayish, with short internodes, the branchlets scaberulous; stipules 
1.5-5 mm. long, subulate, pungent, stramineous; petioles 1-2 mm. long, broad, compressed; 
leaf-blades narrowly lanceolate or linear-lanceolate, 2-3 cm. long, 4-6 mm. wide, narrowed to 
the base, acute at the apex and spine-tipped, rigid-coriaceous, glabrous, grayish-green and 
lustrous above, slightly paler beneath, the costa very prominent beneath, the lateral veins 
obscure, numerous, ascending at a very acute angle, the margins revolute or nearly plane; 
pedicels slender, 5-10 mm. long, ebracteate or with a minute subulate bract at the base; hypan- 
thium 2-3 mm. long, glabrous, the calyx-lobes linear-subulate, 7 mm. long; corolla purplish-red, 
the tube about 2 cm. long, 1.5 mm. thick, the lobes lance-ovate, about 12 mm. long, 6.5 mm. 
wide at the base, imbricate; anthers 6 mm. long, obtuse; capsule broadly obconic, 12-15 
mm. long, 10 mm. broad. 
TYPE LOCALITY: Near Barahona, Santo Domingo, at an altitude of 200 meters. 
DISTRIBUTION: Known only from the type locality. 
