Guettarda filipes Standl.

Guettarda filipes vStandley, Contr. U. S. Nat. Herb. 20: 210
1919.
Branches blackish or ferruginous, lenticellate, the slender branchlets densely pilo.se, with elongate internodes; stipules triangular-lanceolate, filiform-acuminate, 5 mm. long, deciduous; leaves opposite, the slender petioles 3-8 mm. long, short-pilose; leaf-blades ovate, elliptic, or oblong-elliptic, 3-5.5 cm. long, 1.2-2.5 cm. wide, short-acuminate, rounded to subacute at the base, membranaceous, green above, densely short-pilose, at least when young, the venation plane, paler beneath, densely pilose with short, whitish, mostly spreading hairs, the costa and lateral nerves prominulous, the latter about 7 on each side, subarcuate, the veins mostly obsolete, the margin plane; cymes lax, few-flowered, the peduncles subfiliform, 1.3-3.5 cm. long, pilose, the branches short, .slender, the flowers partly sessile and partly on slender pedicels 1-3 mm. long, the bractlets linear, equaling or much longer than the calyx; calyx and hypanthium appressed-pilose, the calyx 1.5 mm. long, shallowly bilobate; corolla minutely sericeous outside, the slender tube 6-7 mm. long, the lobes rounded, 1-1.5 mm. long, glabrous within; ovary 2-celled.
Type locality: Near Huasemote, Durango. Distribution: Known only from the type locality.