Tripsacum dactyloides (L.) L.

Tripsacum floridanum Porter ; Vasey, Contr. U. S. Nat, Herb
3:6. 1892.
Tripsacum dactyloides floridanum Beal, Grasses N. Am. 2 : 19. 1896.
Smooth and glabrous. Stems up to 1 m. tall, slender, from stout horizontal rootstocks ; leaf-blades up to 4 dm. long, usually under 5 mm. wide, rarely broader, long-acuminate, narrowed toward the base ; spikes on the branches and at the summit of the stem single, 8-20 cm. long, slender, the lower one quarter or less pistillate ; pistillate spikelets 6-7 mm. long, the outer scale acute to acuminate ; staminate spikelets 5-6 mm. long, the outer 2 scales glabrous or pubescent, oblong, obtuse to acutish.
Type locality : Miami, Florida. Distribution : Southern Florida.

Tripsacum dactyloides L,. Syst. Nat. ed. 10. 1261. 1759
Coix dactyloides L. Sp. PI. 972. 1753.
Tripsacum monosiachyum Willd. Hort. Berol. 1:1. 1803.
Tripsacum dactyloides monostachyon Wood, Class Book 453. 1845.
Tripsacum compressum Fourn. Bull. Soc. Bot. Belg. 15 : 466. 1876. Not T, compressum Rasp.
1825. Tripsacum dactyloides hispidum Hitchc. Bot. Gaz. 41 : 295. 1906.
Stems glabrous, or sometimes pubescent below the inflorescence, up to 2.5 m. tall, from stout horizontal rootstocks; leaf -sheaths glabrous, or hirsute at the apex; blades up to 6 dm. long, usually 1-2 cm. wide, rarely broader, longacuminate, narrowed at the base, glabrous, or sometimes hirsute or hispid on the upper surface ; spikes usually single on the branches, often 2-4 at the summit of the stem, 1-3 dm. long, the lower one quarter to one half pistillate ; pistillate spikelets 7-10 mm. long, the first or outer scale broadly ovate, acute ; staminate spikelets 7-11 mm. long, the outer 2 scales oblong, from rounded to acute at the apex, glabrous or pubescent.
Type locality : America.
Distribution: Rhode Island to Nebraska, south to Florida, Texas, and Mexico; southern Bahamas ; Haiti ; also in South America.