Part 2, 1912] POACEAE 123 
lax, the branches elongate, slender; spathes 4-8 cm. long, glabrous or pubescent; racemes in 
pairs, the subsessile one with a pair of homogamous spikelets at the base, the internodes of 
the rachis and the pedicels ciliate with long hairs; perfect sessile spikelet 4-6 mm. long, 
hirsute, the first scale 7-nerved, the nerves vanishing below the apex, the fourth scale 2-toothed, 
bearing a perfect awn 1.5-3.5 cm. long; pedicellate spikelet resembling the sessile one, hirsute. 
TYPE LOCALITY: Portugal. 
DISTRIBUTION: Introduced into Haiti and Mexico; a native of the Old World. 
ILLUSTRATIONS: Host, Gram. Austr. 4: f/. 1; Reichenb. Ic. Fl. Germ. f. 460. 
36. Andropogon bracteatus H. & B.; Willd. Sp. Pl. 4: 914. 1806. 
Cymbopogon Humboldt Spreng. Pugill. 2:15. 1815. 
Anthistiria reflexa H.B.K. Nov. Gen. & Sp. 1:191. 1816. 
Anthistivia foliosa H.B.K. Nov. Gen. & Sp.1:191. 1816. 
Cymbopogon reflexus R. & S. Syst. 2: 834. 1817. 
Cymbopogon foliosus R. & S. Syst. 2: 835. 1817. 
Anthistiria Humboldtii Nees, Agrost. Bras. 369. 1829. 
Anthistiria pilosa J. Presl, in Pres], Rel. Haenk. 1: 348. 1830. 
Andropogon trachypus Trin. Mém., Acad. St. Petersb. VI. 2: 280. 1832. 
Anthistiria andropogonoides Steud. Syn. Gram. 402. 1855. 
Hyparrhenia foliosa Anderss.; Fourn. Mex. Pl. Gram. 67. 1881. 
Sorgum bracteatum Kuntze, Rev. Gen. 791. 1891. 
Perennial. Stems 1 m. tall or more, glabrous, or appressed-pubescent below the nodes, 
branched above; leaf-sheaths appressed-hirsute above, otherwise glabrous; blades 3-4 dm. 
long, 2-4 mm. wide, rigid, usually pubescent below, rarely glabrous; inflorescence up to 3 
dm. long, narrow, the branches often nodding; spathes brown, acuminate, 2-2.5 cm. long, 
usually appressed-hirsute, rarely glabrous; racemes in pairs, 8-12 mm. long, on a common 
peduncle which is curved and tuberculate-setiferous at the apex, one raceme nearly sessile, 
the other on a peduncle about 2 mm. long, the dark-violet appendage 1.5-2 mm. long, a pair, 
or sometimes 2 pairs, of homogamous spikelets present in one raceme, wanting in the other; 
perfect sessile spikelet glabrous, 5—6.5 mm. long, including the densely barbed callus which is 
1-1.5 mm. long, linear-oblong, the first scale chartaceous-herbaceous, 7-nerved, hispidulous 
at the apex, deeply sulcate, the second scale 3-nerved, the keel often running out into a mucro, 
the fourth scale bearing an awn 2-3 cm. long, the column pubescent with short brown hairs; 
pedicellate spikelet staminate, 5 mm. long, lanceolate, the first scale 7-nerved, acute, muticous 
or shortly awned, hispidulous above on the nerves, the second scale 3-nerved, retrorsely ciliate 
with long hairs. 
TYPE LOCALITY; Cumana, Venezuela. _ : : : 
DISTRIBUTION: Mexico to Panama; St. Vincent; also in tropical South America. 
ILLUSTRATION: Mart. Fl. Bras. 23: pl. 64. 
37. Andropogon Ruprechti (Fourn.) Hack. in DC. Monog. 
Phan. 6: 645. 1889. 
Andropogon anthestirioides Rupr.; Galeotti, Bull. Acad. Brux. 92: 245; hyponym. 1842. Not A. 
anthistirioides Hochst. 1851. 
Hyparrhenia Ruprechti Fourn. Mex. Pl. Gram. 67. 1881. 
Sorgum Ruprechti Kuntze, Rev. Gen. 792. 1891. 
Stems 1 m. tall or more, branched above; leaf-sheaths terete, keeled and usually hirsute 
above, rarely glabrous; blades 2-4 dm. long, 4-6 mm. wide, rough, puberulent; inflorescence 
2-4 dm. long, the branches elongate; spathes 4-5 cm. long, sparsely pubescent, rarely gla- 
brous; racemes erect, 2-2.5 cm. long, in pairs, one containing a single perfect spikelet, or 
rarely 2 spikelets, one raceme sessile, the other on a peduncle about 2 mm. long, the appendage 
about 5 mm. long; perfect sessile spikelet glabrous, 11 mm. long, including the callus which 
is about 4 mm. long, the first scale bi-mucronate at the apex, the fourth scale retrorsely 
ciliate, bearing an awn 5-7 cm. long, the column flexuous, pubescent with short hairs; pedi- 
cellate spikelet staminate, about 12 mm. long, the first scale with 5 nerves. 
TYPE LOCALITY : Zacuapan, Vera Cruz. 
DISTRIBUTION : Mexico and Guatemala. 
DouBTFUL SPECIES 
Anatherum Berterianum Spreng.; Schultes, in R. & S. Syst. Veg. Mant. 2: 443, 1824. 
Andropogon elythrophyllus Steud. Syn. Gram. 378. 1854. 
