Alternanthera laguroides (Standl.) Standl.

Achyranthes laguroides Standley, Contr. U. S. Nat. Herb
18: 90. 1916.
Stems erect or ascending, suffrutescent below, 1 meter long or less, much branched, the branches striate, sparsely pilose-strigose or glabrate; leaves very short-petiolate, the blades narrowly lanceolate to elliptic-linear, 1.5-5.5 cm. long, 2-6 mm. wide, acuminate or attenuate at both ends, pilose-sericeous, densely so beneath; peduncles simple or branched, 0.5-2 cm. long, or the heads often sessile or subsessile, the peduncles densely pilose-sericeous; spikes ovoid or short-cylindric, 1-2 cm. long, 9 mm. thick, the flowers whitish-stramineous; bracts and bractlets ovate-triangular, half as long as the sepals, acuminate or long-acuminate, sparsely pilose or glabrate; sepals linear-oblong, 4—5 mm, long, acuminate, membranaceous, 1-nerved, pilose near the base with straight erect jointed white hairs, these equaling or slightly exceeding the sepals; stamen-tube elongate, the antheriferous lobes short; staminodia ligulate, exceeding the anthers, deeply and acutely laciniate at the apex; style elongate.
Type locality: Near San Francisco de Guadalupe, Costa Rica. Distribution: In hedges and thickets, Costa Rica.

Alternanthera laguroides là loài thực vật có hoa thuộc họ Dền. Loài này được (Standl.) Standl. mô tả khoa học đầu tiên năm 1925.