Descripción: Plantas trepadoras o lianas con tronco espinoso. Ramitas con espinas arqueadas. Hojas simples y opuestas, a veces subopuestas, de 4-15 x 2-6 cm, obovadas o elípticas, con ápice agudo, bordes enteros y base aguda o decurrente. Las hojas son pubescentes en la nervadura central del haz y tomentosas o seríceas por el envés. Pecíolo de 0.5-4 cm de largo. Flores verde pálidas o amarillentas. Frutos de 1-1.5 x 0.7-1.5 cm.

Especies Parecidas: A menudo se confunde con LK guapst Guapira standleyana LK2 , pero G. standleyana es un árbol y las ramitas no tienen espinas.

Usos: Con las hojas y los tallos de esta planta se fabrica un remedio para curar la artritis y el reumatismo. La planta es hospedera de varias especies de mariposas.

L., Sp. Pl.1026.1753 Dioecious, climbing shrub or liana, growing into canopy, its climbing aided by stout, recurved, axillary spines on smaller stems, nearly glabrous to sparsely villous, especially on younger parts, underside of leaves, and axes of inflorescences; trunk to 12 cm diam, unarmed; branching divaricate. Leaves opposite to subopposite, the pairs often markedly unequal; petioles 0.5-3 cm long; blades variable, mostly obovate to obovate-elliptic, acute to short-acuminate at apex, rounded to acute at base, 2-10 cm long, 1.5-5 cm wide, usually glabrate above except midrib. Inflorescences usually terminal on condensed short shoots; flowers greenish-yellow, numerous, in dense, +/- globular, short-pedunculate clusters to 4 cm diam; pedicels short, bearing few bracts; pedicels and perianth densely and coarsely short-pubescent; staminate flowers campanulate, ca 3 mm long, the limb 5-7 mm diam, the lobes 5, acute; stamens 6-8 (often 7), unequal, widely exserted, to 8 mm long; anthers as broad as or broader than long, longitudinally dehiscent, dorsifixed at base; pistillode with a slender style and brushlike stigma, usually held to one side and above rim. Pistillate flowers tubular, ca 2.5 mm long; style short-exserted; stigma brushlike; staminodia reduced. Fruiting inflorescences usually much expanded; anthocarps club-shaped and 5-sided, to 1.5 cm long, densely short-pubescent, bearing a longitudinal row of prominent stalked glands on the angles, the glands sticky. Croat 5390, 8313. Occasional, in the canopy of the forest, sometimes hanging down over the edge of the lake. Plants may lose their leaves just before flowering. Flowering usually occurs from January to April, with the fruits maturing as early as February. Widely distributed in the American tropics. In Panama, known from tropical moist forest in the Canal Zone and Panama, from premontane moist forest in Panama, and from premontane wet forest in Coclé.