Alternanthera cordobensis (Standl.) Standl.

Achyranthes cordobensis Standley, Contr. U. S. Nat. Herb
18: 90. 1916.
Plants much branched, the branches spreading, loosely short-pilose, or glabrate in age; petioles 1~3 mm. long; leaf -blades ovate-oblong or oval, or the uppermost lance-oblong, 3-6 cm. long, 0.8-2 cm. wide, rather abruptly long-acuminate at the apex, obtuse at the base, thin, densely pilose-sericeous beneath, less densely so on the upper surface; peduncles simple, axillary, 2-6 cm. long, pilose with ascending hairs; spikes solitary, rarely sessile, ovoid or shortcylindric, 0.8-1.5 cm. long, 1 1 mm. thick; bracts and bractlets half as long as the sepals, broadly ovate, aristate-acuminate, subscarious, stramineous; sepals lance-oblong, 5 mm. long, acutish, subcartilaginous in age, 3-nerved, stramineous, sparsely short-pilose, the tips slightly spreading; stamentube short ; staminodia much exceeding the anthers, less than half as long as the sepals, ligulate, deeply fimbriate at the apex; style evident, the stigma entire.
Type locality: Valley of C6rdoba, Vera Cruz. Distribution: Southern Mexico.