Part 2, 1912] POACEAE 133 
ascending, slender, the lower in whorls of 2-5, rarely divided, the longer, exclusive of the 
spikelets and awn, 5-8 cm. long; sessile spikelet laterally compressed, about 1.5 cm. long, 
including the callus which is 6-7 mm. long and densely barbed, the first and second scales 
dark-brown, shining and coriaceous at maturity, hispidulous at the apex, the fourth scale with 
a flexuous more or less contorted usually geniculate perfect awn 14-16 cm. long; pedicellate 
spikelets 10-12 mm. long, on slender glabrous pedicels about reaching the apex of the sessile 
spikelet, empty or containing a staminate flower. 
TYPE LOCALITY: Sandy pine barrens, near Jacksonville, Florida. 
DISTRIBUTION : Florida and Cuba. 
ILLUSTRATION: Bull. U. S. Dep. Agr. Agrost. 7: f. 17. 
29. THEMEDA Forsk. Fl. Aegypt.-Arab. 178. 1775. 
Anthistiria L. £. (Nov. Gram. Gen, 35; hyponym. 1779) Suppl. 113. 1781. 
Androscepia Brongn. in Duperrey, Voy. Coq. Bot. Phan. 77. 1831. 
Usually tall perennial grasses with leafy panicles composed of short thick racemes of 7-11 
spikelets, the peduncles of which are commonly included in the subtending spathe. Spikelets. 
of 3 kinds: involucral, pedicellate, and sessile. Involucral spikelets in 2 pairs at the base of the. 
raceme, usually apparently arising from the same place, or sometimes the pairs measurably: 
distant, containing from 1-3 scales, and either empty or enclosing staminate flowers. Pedicel- 
late spikelets 2—-several, composed of 1-3 scales, and either empty or enclosing staminate flowers. 
Sessile spikelets of 4 scales; first scale usually indurated in fruit; second scale of similar texture 
to the first; third scale hyaline; fourth scale also hyaline, enclosing a perfect flower, and 
usually bearing a perfect awn, rarely muticous or with animperfectawn. Stamens3. Stigmas 
exserted near the middle or apex of the spikelet. 
Type species, Themeda triandra Forsk. 
Involucral and pedicellate spikelets each consisting of 1 scale, without flowers. 1. 7. arguens. 
Involucral and pedicellate spikelets each consisting of 3 scales, usually with 
staminate flowers. 2. 7. guadrivaluvts, 
1. Themeda arguens (1,.) Hack. in DC. Monog. Phan. 6: 657. 1889. 
Stipa arguens I,. Sp. Pl. ed. 2.117. 1762. 
Anthistiria arguens Willd. Sp. Pl. 4: 901. 1806. 
Annual. Stems up to 3 m. tall; leaf-sheaths glabrous or hairy; blades up to 4 dm. 
long, 3-6 mm. wide, glabrous or sometimes hairy at the base; panicle occupying usually 
less than one half of the stem; spathes 3-4 em. long, long-attenuate at the apex, usually more 
or less hirsute; involucral spikelets 7-10 mm. long, the first scale acuminate or cuspidate; 
pedicellate spikelets subulate, similar to the involucral; sessile spikelets 9-11 mm. long, includ- 
ing the pungent callus which is 3-4 mm. long and densely barbed with brown hairs, the first 
scale hispidulous above, the fourth scale with an awn 5-9 cm. Jong. 
TYPE LOCALITY: India. : 
DISTRIBUTION : Introduced into Jamaica. Native from Malacca to northern Australia. 
ILLUSTRATION: Rumph. Amb. 6: 1.6, f. 1. 
2. Themeda quadrivalvis (1,.) Kuntze, Rev. Gen. 794, 1891. 
Andropogon nutans L,. Mant. 303. 1771. Not A. nutans, 1753. 
Andropogon quadrivalvis 1,. Syst. Veg. ed. 13. 758. 1774. 
Anthistiria ciliata I,. £. Suppl. 113. 1781. 
Themeda ciliata Hack. in DC. Monog. Phan. 6: 664, 1889. 
Annual. Stems up to 1 m. or more tall; leaf-sheaths glabrous; blades up to 3 dm. 
long, flat, linear, 4-6 mm. wide, glabrous; panicle usually composing more than one half of 
the stem; spathes long-attenuate at the apex from a lanceolate base; involucral spikelets 5-7 
mun. long, the first scale papillose-ciliate on the keels with long stiff hairs; pedicellate spikelets 
lanceolate; sessile spikelets 5-6 mm. long, including the obtuse callus which is about 1 mm. 
long and densely barbed with brown hairs, the first scale hispid at the summit, the fourth 
scale with an awn 3-5 cm. long. 
TYPE Loca.ity: India. ; : 
DISTRIBUTION : Introduced into Martinique and Barbados; native of the East Indies. 
ILLUSTRATIONS: Gaertn. Fruct. £/, 175; Lam. Tab. Encyc. pi. 841, f. 1,2; Beauv. Agrost. p/, 
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