Exostema longiflorum (Lamb.) Schult.

Exostema longiflorum (Lamb.) R. & S. Syst. Veg. 5: 18
1819.
Cinchona longiflora Lamb. Descr. Cinchona 38. 1797.
Shrub, 1-2 meters high, the branches stout or slender, gray or brownish, puberulent or
villosulous when young, usually densely leafy; stipules oblong or lanceolate, 2.5-6 mm. long,
acuminate or attenuate, thin, green, puberulent; petioles slender or stout, 3-12 mm. long,
rarely wanting; leaf-blades linear-lanceolate, very narrowly lance-elliptic, or oblanceolate,
5-11 cm. long, 0.8-2.5 cm. wide, long-attenuate at the base, usually long-attenuate to the
acutish apex, membranaceous, bright-green, sparsely white-pilose beneath in the axils of the
chief veins, elsewhere glabrous, the costa impressed above, prominent beneath, the lateral
veins evident, few, distant, ascending, the margin usually plane; flowers axillary and solitary
or 1-3 at the ends of the branches, the pedicels stout, shorter than the calyx; hypanthium
cylindric, 6-8 mm. long, glabrous; calyx-lobes 5, linear-subulate, 3-6 mm. long; corolla white
or pink, glabrous, the tube 12-14 cm. long, 2-2.5 mm. thick, curved, the 5 lobes linear, 4-5 cm.
long, recurved; stamens exserted, the anthers linear, about 2 cm. long; capsule oval-ellipsoid,
about 1.5 cm. long, coarsely costate, the valves about 8 mm. wide after dehiscence.
Type locality: Given as Guiana [an error for Santo Domingo]. Distribution: Along streams, Cuba and Hispaniola.