PaR?T 2, 1917] AMARANTHACEAE 143 
dia longer than the anthers, slightly shorter than the sepals, ligulate, laciniate at the apex; 
style evident, the stigma entire; seed subglobose, 1 mm. in diameter, dark reddish-brown. 
TYPE LOCALITY: State of Oaxaca. 
DISTRIBUTION: Vera Cruz to Oaxaca and Panama. 
21. Achyranthes costaricensis (Kuntze) Standley, Jour. Wash. 
Acad. Sci. 5: 74. 1915. 
Alternanthera costaricensis Kuntze, Rev. Gen. 538. 1891. 
Stems 3-7 dm. high, erect, suffrutescent below, subpilose with long retrorse stellate hairs; 
leaf-blades ovate or broadly lanceolate, 10 cm. long or less, sparsely pubescent with simple 
hairs, the veins pilose like the stems; peduncles densely pilose, axillary, 1-4 cm. long; spikes 
globose, solitary, 2.5 cm. long or less; bracts ovate, entire, aristate-acuminate, shorter than the 
sepals; perianth subsessile, the sepals lanceolate, acuminate, subpilose, 3-nerved, stramineous; 
Staminodia longer than the filaments, lanceolate, pectinately incised; anthers very short, 
ovoid; ovary attenuate to a short style; stigma entire. 
TYPE LOcALIty: Eastern Costa Rica, at an altitude of 300 meters. 
DISTRIBUTION: Known only from the type locality. 
22. 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 em. 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. 
Disrripution: In hedges and thickets, Costa Rica. 
23. Achyranthes stenophylla Standley, Contr. U. S. Nat. Herb. 
18: 90. 1916. 
Stems slender, branched, the branches ascending or suberect, striate, very sparsely 
pilose or glabrate; leaves numerous, the internodes short, the petioles 2-10 mm. long, the blades 
linear to elliptic-linear, 2.5-5 cm. long, 3-6 mm. wide, acute or acutish at the apex, acuminate 
at the base, very sparsely appressed-pilose or glabrate; peduncles axillary, simple, 2-5 cm. 
long, short-pilose, very slender; spikes ovoid or short-cylindric, 6-10 mm. long, 6 mm. thick; 
bracts broadly ovate, acute, glabrous; bractlets half as long as the sepals, acuminate, long- 
aristate, sparsely short-villous; sepals lance-oblong, 2.5 mm. long, acute or acutish, mem- 
branaceous, 3-nerved, sparsely short-pilose, stramineous, the tips erect or slightly incurved; 
filaments short, the staminodia ligulate, longer than the anthers, two thirds as long as the 
sepals, lacerate at the apex; style evident, the stigma entire. 
TYPE LOCALITY: Panama. 
DISTRIBUTION: Panama. 
24. Achyranthes Lehmannii (Hieron.) Standley, Jour. Wash. 
Acad. Sci. 5: 74. 1915. 
Alternanthera Lehmannii Hieron. Bot. Jahrb. 20: Beibl. 49: 8. 1895. 
Stems slender, sparsely branched, the branches ascending or procumbent, appressed- 
pilose or glabrate; leaves numerous, mostly shorter than the internodes, the petioles 4—10 
