122 NORTH AMERICAN FLORA (VoLuME 17 
32. Andropogon nodosus (Willem.) Nash. 
Dichanthium nodosum Willem, Ann. Bot. Usteri 18: 11. 1796. 
Andropogon arisiatus Poir. in Lam. Encyc. Suppl. 1: 585. 1810. 
Andropogon mollicomus Kunth, Rév. Gram. 365. 1830. 
Diplasanthum lanosum Desv. Opuse. 67. 1831. 
Andropogon caricosus mollicomus Hack. in DC. Monog. Phan. 6: 569. 1889. 
Stems up to 1.5 m. tall, rather stout, usually branched above, decumbent and rooting 
below, softly pubescent at the apex below the inflorescence; leaf-sheaths compressed, keeled, 
shorter than the internodes; blades up to 3 dm. long, 4-6 mm. wide, usually rough, glabrous, 
or pubescent at the base; racemes in 2’s—4’s, sometimes solitary, 6-10 cm. long, the internodes 
and pedicels about one third as long as the sessile spikelets, ciliate on one margin; perfect sessile 
spikelet 4-5 mm. long, somewhat convolute below, the first scale chartaceous-herbaceous, 
broadly obovate-elliptic, about 12-nerved, the nerves vanishing below the somewhat 3-toothed 
apex, pubescent on the smooth shining back, the second scale much narrower and almost 
enclosed by the first, the fourth scale bearing an awn 2-2.5 cm. long; pedicellate spikelet 
equaling the sessile one and similar to it, but flat and more pubescent, the first scale 15-19- 
nerved, ciliate on the keels. 
TYPE LOCALITY: Mauritius. 
DISTRIBUTION: Introduced into Florida, Antigua, Guadeloupe, and Barbados ; a native of the 
Old World tropics. 
ILLUSTRATIONS: Kunth, Rév. Gram. p/. 96; Desv. Opusc. pl. 5, f. Z. 
33. Andropogon Nardus L. Sp. Pl. 1046. 1753. 
Sorgum Nardus Kuntze, Rev. Gen. 792. 1891. 
A tall aromatic perennial, with the elongate leaves crowded at the base of the stem, and a 
large decompound inflorescence. Stems 1-2 m. tall, much branched; leaf-sheaths terete, 
smooth and glabrous, glaticous; blades up to 1 m. long, 1.5-2 cm. wide, glabrous, glaucous 
below; inflorescence up to 8 dm. long, lax; spathes narrowly cymbiform, 1.5-2 em. long; 
racemes 1-1.5 cm. long, of 4 or 5 internodes, equaling or extending somewhat beyond the 
apex of the spathes; perfect sessile spikelet 4-5 mm. long, lanceolate, narrowed from the middle 
or above, the first scale narrowly winged on the keels, the intercarinal space flat and 2—4-nerved, 
the fourth scale 2-toothed at the apex, muticous or mucronate; pedicellate spikelet staminate, 
acute. 
TYPE LOCALITY: India. 
DISTRIBUTION: Old World tropics, often cultivated in the American tropics, and escaping in 
Florida, Jamaica, Martinique, and Guadeloupe. 
ILLUSTRATION: Field Columb. Mus, Publ. Bot. 3: 20,f. 
34. Andropogon ceriferus Hack. in Mart. Fl. Bras. 2°: 281. 1883. 
Andropogon Nardus ceriferus Hack. in DC. Monog. Phan. 6: 605. 1889. 
A tall aromatic grass, with the elongate leaves crowded at the base of the stem, and a 
long lax decompound inflorescence. Stems 1-2 m. tall, much branched, ceriferous at the 
nodes; leaf-sheaths terete, smooth and glabrous; blades up to 1 m. long, 1-2 cm. wide, usually 
rough, glaucous; inflorescence 3-8 dm. long, linear-oblong, usually interrupted below, the 
elongate branches and their divisions somewhat nodding; spathes lanceolate, 1.5-2 cm. long; 
racemes in pairs, 1.5—-2 em. long, of about 4 internodes, included in the spathes or exserted a 
little beyond them; perfect sessile spikelet linear-lanceolate, acuminate, the first scale minutely 
2-toothed at the apex, the keels narrowly margined, the intercarinal space nerveless, canalicu- 
late-depressed at the base, the fourth scale 2-toothed at the apex, shortly mucronate between 
the teeth; pedicellate spikelet staminate, dark-violet. 
TYPE LOCALITY: Near Rio de Janeiro, Brazil. 
DISTRIBUTION : Jamaica, Cuba, Porto Rico, St. Thomas, and Barbados; also in Brazil. 
35. Andropogon hirtus L. Sp. Pl. 1046. 1753. 
Trachypogon hirtus Nees, Agrost. Bras. 346. 1829. 
Sorgum hirlum Kuntze, Rev. Gen. 792. 1891. 
Stems 4-12 dm. tall, somewhat branched above; leaves glaucous; sheaths glabrous; 
blades up to 2 dm. long, 1.5-3 mm. wide, linear, rigid, rough; inflorescence 1.5-4 dm. long, 
