Alternanthera serpyllifolia (Poir.) Urb.

Achyranthes serpyllifolia Poir. in Lam. Encyc. Suppl. 1:11. 1810
Iresine serpyllifolia Moq. in DC. Prodr. 13 2 : 341. 1849.
Achyranthes tenella Poit.; Moq. in DC. Prodr. 13*: 341, as synonym. 1849.
Alternanthera serpyllifolia Urban, Symp. Ant. 5: 340. 1907.
Stems suffruticose, prostrate, very slender, flexuous, branched, geniculate, terete, striate, glabrate, the branches filiform, divaricate, appressed-pubescent, villous in the axils; petioles 2-6 mm. long; leaf-blades ovate-orbicular, 5-15 mm. long, 3-12 mm. wide, subdecurrent at the base, mucronulate at the apex, subcoriaceous, the younger ones appressed-hirtellous ; heads sessile; axillary and terminal, oblong, obtuse, 5-10 mm. long, 4 mm. in diameter, the rachis villous, the flowers sublustrous, subf uscous ; bracts and bractlets about one third as long as the perianth, acute, pilosulous, white; sepals ovate-lanceolate, 2 mm. long, acute, 3-nerved, hirtellous; filaments short, triangular-subulate; staminodia none; utricle ovoid, subcompressed; seed oblong, lustrous, reddish-brown.
Type locality: Hispaniola.
Distribution: Hispaniola and eastern Cuba.