Part 2, 1912] POACEAE 115 
1-2 mm. wide, those on the innovations much compressed laterally, grooved or furrowed on 
the upper side, those on the stem flat, puberwlent on the upper surface; spathes 4-5 cm. long, 
extending beyond the summit of the racemes which are in pairs, 2.5-4 cm. long; sessile spike- 
let 4.5-5 mm. long, one and a half times to twice as long as the internodes, the awn 12-18 mm. 
long; pedicellate spikelet wanting, or rarely present as a minute scale, the pedicel exceeding 
the sessile spikelet. 
TYPE LOCALITY: Florida. . 
DISTRIBUTION : Georgia and Florida to Mississippi. 
8. Andropogon floridanus Scribn. Bull. Torrey Club 23: 145. 1896. 
Stems tufted, 5-16 dm. tall, much branched above the middle, the branches-in 1’s-3’s; 
leaf-sheaths roughish, usually shorter than the internodes; blades 5 dm. long or less, up to 1 
cm. wide, rough; racemes in pairs, occasionally in 3’s or 4’s, 3-4 cm. long, the peduncle densely 
barbed, and exserted, or the racemes partly included at the base; sessile spikelet 3.5-4 mm. 
long, lanceolate, equaling or a little longer than the internodes, the first scale hispidwous on 
the keels above, the intercarinal space flat or somewhat depressed, the fourth scale entire, 
bearing an imperfect awn 8-12 mm. long; pedicellate spikelet wanting, or present as a small 
scale, the pedicel exceeding the sessile spikelet. 
TYPE LOCALITY: Southern peninsular Florida. 
DISTRIBUTION : Southern peninsular Florida. 
9. Andropogon subtenuis Nash, in Small, Fl. SE. U.S. 63. 1903. 
Stems 3-6 dm. tall, slender, the branches single; leaf-sheaths smooth and glabrous; 
blades 1.5 dm. long or less, 1-2 mm. wide, smooth beneath, rough above and usually somewhat 
hirsute near the base; racemes in pairs, exserted, or a little included in the narrow spathe, 
2-3 em. long; sessile spikelet 3.5-4 mm. long, exceeding the internodes, the basal hairs shorter 
than the spikelet, the first scale hispidulous above on the keels, the intercarinal space flat or 
somewhat depressed, the awn 1-1.5 cm. long, more or less contorted, slightly twisted at the 
base; pedicellate spikelet wanting, or a minute rudimentary scale, the pedicel considerably 
exceeding the sessile spikelet. 
TYPE LOCALITY: Biloxi, Mississippi. _ 
DISTRIBUTION : Florida to Mississippi. 
10. Andropogon Nashianus Hitchc. Contr. U. S. Nat. 
Herb. 12: 193. 1909. 
Stems 3-4.5 dm. tall, single or in small tufts, simple, slender, glabrous; leaf-sheaths 
glabrous, or sparingly pilose toward the summit, much shorter than the internodes; blades 
1-4 cm. long, 1 mm. wide, the basal sometimes 1 dm. long, the uppermost one almost wanting, 
complanate, glabrous; racemes in pairs, 3-4 cm. long, the pedicels and rachis-internodes 
equaling or shorter than the sessile spikelets, hairy with long hairs 5-7 mm. in length; sessile 
spikelet 3-3.5 mm. long, elliptic, obtuse or merely acute, the first scale hispidulous on the 
keels, the intercarinal space nerveless, the second scale shorter than the first, the fourth scale 
bearing an awn 1-1.5 cm. long; pedicellate spikelet reduced to a single involute scale 1-2 
mui. long. 
TYPE LOCALITY: Cuba. 
DISTRIBUTION: Cuba. 
11. Andropogon Tracyi Nash, Bull. N. Y. Bot. Gard. 1: 433. 1900. 
Stems tufted, 5-8 dm. tall, the branches in 1’s or 2’s; leaf-sheaths smooth and glabrous; 
blades 2 dm. long or less, 1-3 mm. wide, smooth beneath, rough above and hirsute toward the 
base; spathes 4-5 cm. long, rather broad; racemes in pairs, shorter than the spathes or extend- 
ing beyond them, 3-4 em. long, rather stout; sessile spikelet 4.5-5 mm. long, about twice as 
long as the stout internodes which are densely clothed with silvery-white hairs longer than the 
spikelet, the first scale hispidulous on the keels, the fourth scale bearing an awn 1.5—2 cm. long, 
sometimes a little spiral at the base; pedicellate spikelet wanting, or present as a minute rudi- 
mentary scale, the pedicel exceeding the sessile spikelet. 
TYPE LocaLITy: Columbus, Mississippi. = 
DISTRIBUTION : Georgia and Florida to Mississippi. 
