Pentalinon andrieuxii (Müller Argoviensis) B. F. Hansen & R. P. Wunderlin

Urechites andrieuxii Muell.-Arg. I^innaea 30: 442. 1860
Suffruticose or fruticose liana; leaves opposite, membranaceous to subcoriaceous, oblongelliptic to ovate-elliptic or obovate-elliptic, 5-12 cm. long, 2.5-7 cm. broad, rather shortly acuminate, obtuse or rounded at the base, glabrous above, glabrous to very finely puberulent beneath, the petioles 8-20 mm. long; inflorescence alternateaxillary, usually somewhat longer than the leaves, bearing few to several, handsome, cream-colored flowers; pedicels 15-22 mm. long, glabrous to very inconspicuously puberulent; bracts minute, scarious; calyx-lobes ovate, obtuse, 3-5 mm. long, essentially glabrous, the squamellae paired, alternate with the lobes; corolla infundibuliform, glabrous externally, the tube proper 10-15 mm. long, about 3 mm. in diameter at the base, the throat broadly tubular or subtubular, 25-30 mm. long, 5-8 mm. in diameter at the orifice, the lobes obliquely obovate, 15-23 mm. long, spreading; nectaries completely concrescent, about twice as long as the ovary; follicles relatively stout, continuous, glabrous.
Type locality: Near Tehuantepec, Oaxaca.
Distribution: Oaxaca, Campeche, British Honduras, and Guatemala.