Macrocnemum jamaicense L.

Macrocnemum jamaicense L. PI. Jam. Pug. 31. 1759
Small tree, 4.5-6 meters high, the branches stout, grayish-brown, minutely puberulent when young, sometimes barbate at the nodes; stipules ovate, oblong, or oval, 2-2.5 cm. long, obtuse, brownish, sparsely strigillose or glabrous; petioles stout, 1-2 cm. long, strigillose; leaf-blades obovate, oval-obovate, or oval-oblong, 1 1-20 cm. long, 4.5-9.5 cm. wide, acute or cuneate at the base, rarely obtuse, acute or abruptly or subabruptly short-acuminate at the apex, with an acute or obtuse acumen, membranaceous, sublustrous, glabrous above, the venation plane or impressed, strigose beneath along the veins, the venation prominent, the lateral veins slender, 7-9 on each side, subarcuate, ascending at an angle of 50° or more, the margin plane; inflorescence terminal and axillary, cymose-corymbose, 7-15 cm. broad, manyflowered, the peduncles 8-20 cm. long, the pedicels stout, mostly 4-12 mm. long; bracts often leaf-like, the bractlets triangular, minute; hypanthium 1-2 mm. long, glabrous; calyx-teeth minute, deltoid, very remote; corolla greenish-yellow, fleshy, glabrous outside, the tube 1013 mm. long, 3-4 mm. thick, the lobes broadly ovate, 3-4 mm. long, densely papillose-puberulent within; anthers 1.5 mm. long; capsule cylindric, 1.5-2.5 cm. long, 3-5 mm. thick, blackish-brown, striate, glabrous, narrowed at each end; seeds elongate, about 2 mm. long, brownish.
Type locality: Jamaica.
Distribution: Jamaica; reported from Guadeloupe.

Macrocnemum jamaicense is a species of plant in the family Rubiaceae. It is endemic to Jamaica.