PaRT 2, 1917] AMARANTHACEAE 135 
Spikes 12-15 mm. in diameter; leaf-blades narrow, nearly glabrous. 18. A. philoxeroides. 
Spikes 5-7 mm. in diameter; leaf-blades broad, copiously pubes- 
cent. 
Peduncles branched, stout; flowers purplish. 19. A. panamensis. 
Peduncles simple, slender; flowers white or stramineous. 20. A. mexicana, 
Sepals villous or pilose. 
Spikes cylindric in age. 
Staminodia pectinate-laciniate; pubescence retrorse. 21. A. costaricensis. 
Staminodia laciniate only at the apex; pubescence not retrorse. 
Spikes ae mm. thick; leaf-blades linear to narrowly lance- 
olate. 
Sepals 4-5 mm. long, long-pilose, the hairs equaling the 
sepals. 22. A. laguroides. 
Sepals 2.5 mm. long, sparsely very short-pilose. 
Leaf-blades linear or elliptic-linear, 3-6 mm. wide, 
acute or acutish. 23. A. stenophylla. 
Leaf-blades ovate to elliptic-oblong, 1-3.5 mm. wide, 
abruptly acute to attenuate. 24. A. Lehmannii. 
Spikes es mm, thick; leaf-blades oblong to broadly ovate 
or oval. : 
Sepals densely long-pilose, 6-7 mm. long; leaves nearly 
glabrous; peduncles usually branched. 25. A. pycnantha. 
Sepals sparsely short-pilose, 5 mm. long; leaves copiously 
pubescent; peduncles usually simple. 
Leaf-blades long-acuminate or abruptly acuminate, 
densely pilose-sericeous beneath; sepals acutish. 26. A. cordobensis. 
Leaf-blades acute or acutish, sparsely pilose-strigil- ; 
lose beneath; sepals acuminate. 27. A. Williamsii. 
Spikes globose. 28. A. gracilis. 
Flowers conspicuously pedicellate, the pedicel articulate, deeply 5-sulcate. 
Bractlets longer than the sepals, broadly cristate. 29. A. Jacquini. 
Bractlets much shorter than the sepals. 
Stems strigillose or glabrate; leaf-blades mostly lanceolate or 
narrowly ovate, thick; bractlets not cristate. 30. A. ramosissima. 
Stems pilose with ascending or spreading hairs; leaf-blades broadly 
ovate or oval, thin; bractlets usually narrowly cristate. 31. A. brasiliana. 
1. Achyranthes axillaris Hornem.; Willd. Enum. 270. 1809. 
Achyranthes spinosa Hornem. Hort. Hafn. 1: 240. 1813. 
Celosia axillaris Mart. Pl. Hort. Erlang. 70. 1814. 
Alternanthera spinosa R. & S. Syst. Veg. 5: 555. 1819. 
Ilecebrum spinosum Spreng. Syst. 1: 819. 1825. 
Alternanthera axillaris D. Dietr. Syn. Pl. 1: 866, as synonym. 1839, 
Erect or ascending annual; stems 3-10 dm. high, much branched, the branches stout, 
ascending, striate, villous with grayish hispidulous hairs; petioles 2-10 mm. long; leaf-blades 
oblong to oblong-ovate or rhombic-ovate, 2-6.5 cm. long, 1-3 emi. wide, obtuse or acutish at 
the apex, acute at the base, firm, densely and finely grayish-pubescent beneath with hispidulous 
hairs, green and less densely pubescent on the upper surface; heads axillary, sessile, solitary 
or glomerate, 7-10 mm. in diameter, the flowers stramineous; bracts lance-subulate, shorter 
than the sepals, attenuate to a rigid spinose tip, glabrous; sepals very unequal, lance-subulate, 
5-6 mm. long, indurate, attenuate to a rigid spinose tip, pilose with very slender white hairs; 
filaments subulate-linear, the tube short, the staminodia shorter than the filaments, obtuse, 
irregularly dentate or subentire; style short; utricle short, truncate and obscurely bidentate; 
seed broadly oblong, 1 mm. long, reddish-brown. 
TYPE LocaLity: Not stated. . 
DISTRIBUTION: In thickets and along roadsides, Cuba. 
2. Achyranthes leiantha (Seub.) Standley, Jour. Wash. Acad. Sci. 
5: 73. 1915. 
Alternanthera pungens H. B. K. Nov. Gen. & Sp. 2: 206. 1817. Not Achyranthes pungens Lam. 
1783. 
Celosia echinata Humb. & Bonpl.; R. & S. Syst. Veg. 5: 531. 1819. Not Achyranthes echinata 
Retz. : 
Illecebrum pungens Spreng. Syst. 1: 820. 1825. 
Telanthera pungens Mog. in DC. Prodr. 137: 371, 1849. 
Alternanthera Achyrantha leiantha Seub. in Mart. Fl. Bras. 5!: 183. 1875. 
Stems prostrate, 3-8 dm. long, stout, much branched, villous with obscurely scaberulous 
white hairs; petioles 2-5 mm. long, margined; leaf-blades orbicular, rhombic-orbicular, or 
