142 NORTH AMERICAN FLORA [VoLuME 21 
18. Achyranthes philoxeroides (Mart.) Standley, Jour. Wash. Acad. 
Sci. 5: 74. 1915. 
Bucholzia philoxeroides Mart. Nova Acta Acad. Leop.-Carol. 131; 315. 1826. 
Telanthera philoxeroides Moq. in DC. Prodr. 13?: 362. 1849. 
Telanthera philoxeroides obtusifolia Moq. in DC. Prodr. 132: 363. 1849. 
Telanthera philoxeroides acutifolia Moq. in DC. Prodr. 132: 363. 1849. 
Telanthera philoxeroides phyllantha Seub. in Mart. Fl. Bras. 51: 169. 1875. 
Telanthera philoxeroides denticulata Seub. in Mart. Fl. Bras. 51: 170. 1875. 
Alternanthera philoxeroides Griseb. Abh. Ges. Wiss. Gott. 24: 36. 1879. 
Herbaceous perennial; stems stout, often fistulous, ascending or decumbent, 3-10 dm. 
long, simple or branched, villous in the axils of the leaves, elsewhere very sparsely villous or 
glabrous; leaves very short-petiolate, the blades elliptic-linear to elliptic or obovate, 3.5-11 
em. long, 0.5-2 em. wide, acute or obtuse at the apex, acuminate or attenuate at the base, 
thick, glabrous; peduncles axillary or terminal, simple, 1-5 cm. long, pilose; spikes globose, 
14-17 mm. thick, the flowers white; bracts one fourth as long as the sepals, broadly 
ovate, acute or acuminate, glabrous; sepals ovate-oblong, 6 mm. long, acute or acutish, sub- 
chartaceous, obscurely nerved, often serrulate near the apex; filaments linear-subulate, the 
staminodia exceeding the anthers, half as long as the sepals, ligulate, lacerate at the apex; 
style elongate, the stigma entire. 
TYPE LocaLity: Southern Brazil. 
DISTRIBUTION: In ponds and slow streams or in wet soil, ee from North Carolina to 
Florida and Louisiana; also from Colombia to Brazil and Argentin: 
InLUSTRATIONS: Mart. Fl. Bras. 5!: pl. 51, 52; E. & P. Nat. Pa. 318: f, 47, C. 
19. Achyranthes panamensis Standley, Contr. U. S. Nat. Herb. 
18: 89. 1916. 
Stems weak and probably clambering over shrubs, herbaceous, much branched, the 
branches slender, angulate, short-pilose with solitary or fasciculate, spreading or reflexed 
hairs; petioles 1-4 mm. long; leaf-blades oblong-elliptic or ovate-oblong, 2-5.5 cm. long, 
0.6-2 cm. wide, acute or acuminate at the apex, acutish at the base, firm, bright-green, ap- 
pressed-pilose on both surfaces with short slender fulvous hairs; peduncles axillary and termi- 
nal, simple or usually branched, 1-6 cm. long, slender, densely short-pilose; spikes usually 
solitary, globose-ovoid or short-cylindric, 7-11 mm. long, 7 mm. thick; bracts broadly ovate, 
acuminate, glabrous; bractlets broadly ovate, half as long as the sepals, aristate-acuminate, 
sparsely short-villous; sepals lance-oblong, 2.5 mm. long, acute or acutish, 3-nerved, purplish 
(brownish or fuscous when dry), glabrous; filaments short, linear-subulate; staminodia equaling 
or exceeding the anthers, two thirds as long as the sepals or shorter, lacerate at the apex; 
style short, the stigma entire; seed subglobose, 1 mm. long, black and shining. 
TypPE Locality: Panama. 
DISTRIBUTION: Panama. 
20. Achyranthes mexicana (Schlecht.) Standley, Jour. 
Wash. Acad. Sci. 5: 74. 1915. 
Brandesia mexicana Schlecht. Linnaea 7: 392. 1832. 
Telanthera microcephala Moq. in DC. Prodr. 13#: 371. 1849. 
Telanthera mexicana Mog. in DC. Prodr. 137: 372. 1849. 
Aliernanthera mexicana Hieron. Bot. Jahrb. 20: Beibl. 49:8. 1895. Not A. mexicana Mog. 1849. 
Plants herbaceous, or suffrutescent below; stems erect or ascending, 4-10 dm. high, 
sparsely branched, the branches rather stout, often geniculate, striate, pilose with spreading 
or retrorse hairs; petioles 2-20 mm. long; leaf-blades oval or ovate-oval, 3-10 cm. long, 1-5 
em. wide, rather abruptly long-acuminate at the apex, acute or obtuse at the base, thin, 
bright-green, appressed-pilose on both surfaces with long slender hairs; peduncles axillary 
simple, filiform or nearly so, 2-6.5 cm. long, sparsely pilose or glabrate; spikes short-cylindric 
or subglobose, 5-10 mm. long, 5-7 mm. thick; bracts broadly ovate, acute, subscarious, glab- 
rous; bractlets broadly ovate, about half as long as the sepals, long-aristate, villous along the 
nerve, white or stramineous; sepals narrowly oblong, 2.5-3.5 mm. long, acute or acutish, 
membranaceous, white or stramineous, 3-nerved, glabrous, the tips erect or incurved; stamino- 
