Part 3, 1915] POACEAE 



2tf9 



Type wcauxy: Georgia. 



Distribution: Vermont to Illinois, and south to Florida, eastern Texas, Mexico, and northern 

 South America. 



Illustrations: Bull. Tenn. Exp. Sta. 7: pi. 13, /. 51, 52; Bull. U. S. Dep. Agr. Agrost. 7 

 /. 57; Contr. U. S. Nat. Herb. 15: /. 273; Britt. & Brown, 111. PL /. 252; ed. 2. /. 341. 



Panicum sphaerocatpon inflatum (Scribn. & Smith) Hitchc; Hitchc. & Chase, Contr. U S 

 Nat. Herb. 15: 253. 1910. P. inflatum Scribn. & Smith; Scribn. Circ. U. S. Dep. Agr. Agrost 

 16: 5. 1899. P. mississippiense Ashe, Jour. EHsha Mitchell Soc. 16: 91. 1900. Distinguished by 

 the presence of a ligule 0.3-1 mm. long, taller ascending more slender culms, and narrow parallel- 

 margined blades. Maryland to Florida, west to eastern Texas, thence north to Missouri ; the type 

 was from Biloxi, Mississippi. Illustration: Contr. U. S. Nat. Herb. 15: /. 275. 



162. Panicum polyanthes Schultes, in R. & S. Syst. Veg. Mant. 2: 



257. 1824. 



Panicum multiflorum EH. Bot. S. C. & Ga. 1: 122. O 1816. Not P. multiflorum Poir. My 1816. 

 Panicum microcarpon Muhl. Descr. Gram. 111. 1817. Not P. microcarpon Muhl.; Ell. 1816. 

 Panicum microcarpon isophyllum Scribn. Bull. Tenn. Exp. Sta. 7: 51. 1894. 



Vernal plants light-green, in tufts of few to several culms, 30-90 cm. high, stout, erect, 

 the nodes glabrous or nearly so; leaf -sheaths long, usually overlapping, finely ciliate on the 

 margin, otherwise glabrous ; ligule obsolete or wanting ; blades rather thin, prominently nerved, 

 ascending, 12-23 cm. long, 15-25 mm. wide, the upper seldom reduced, long- acuminate, scarcely 

 narrowed toward the cordate base, rough or smooth on the upper surface, smooth below, the 

 cartilaginous, scabrous margin ciliate toward the base; panicles exserted, 8-25 cm. long, one 

 fourth to half as wide, densely flowered, the lower branches narrowly ascending, often distant, 

 the upper fascicled, spike let-bearing to the base; spikelets 1.5-1.6 mm. long, 1-1.1 mm. wide, 

 obovoid-spheric at maturity, minutely puberulent; first glume one third to two fifths the length 

 of the spikelet, obtuse or obscurely pointed; second glume and sterile lemma equaling the fruit 

 at maturity; fruit obovoid-spheric. 



Autumnal phase remaining erect and simple or producing from the lower or middle 

 nodes simple branches with smaller blades and panicles; winter rosettes like those of P. 

 sphaerocarpon, but the leaves larger. 



Type locality: South Carolina. 



Distribution: New Jersey to Georgia and eastern Texas. 



Illustrations: Bull. Tenn. Exp. Sta. 7: pi. 14, f. 53,. 54 (as P. microcarpon); Bull. U. S. 

 Dep. Agr. Agrost. 17: /. 365; Contr. U. S. Nat. Herb. 15: /. 277; Britt. & Brown, 111. Fl. /. 253 

 (as P. microcarpon); ed. 2.f. 342. 



163. Panicum erectifolium Nash, Bull. Torrey Club 23: 148. 1896. 



Panicum sphaerocarpon floridanum Vasey, Bull. U. S. Dep. Agr. Bot. 8: 33. 1889. 

 Panicum floridanum Chapm. Fl. S. U. S. ed. 3. 585. 1897. Not P. floridanum Trin. 1835. 



Vernal plants dull-green, sometimes bluish, in tufts of few to several culms, 30-70 cm. 

 high, erect or ascending, usually stout, glabrous, including the nodes; leaf-sheaths, except the 

 uppermost, short, rather loose, usually crowded and overlapping at the base, ciliate on the 

 margin, otherwise glabrous; ligule about 0.3 mm. long; blades thick and firm with inconspicuous 

 veins, ascending or erect, 7-1 3 cm. long, 6-12 mm. wide, the crowded lower ones usually much 

 larger than the others, these successively smaller upward, tapering from the cordate base to the 

 acuminate apex, smooth on both surfaces, the margins scabrous, stiffly ciliate toward the base; 

 panicles exserted, 6-12 cm. long, half to two thirds as wide, densely flowered, the lower branches 

 usually narrowly ascending; spikelets 1-1.2 mm. long, 0.8-1 mm. wide, broadly ovate or sub- 

 spheric, densely puberulent; first glume one fifth to one fourth the length of the spikelet, obtuse; 

 second glume and sterile lemma equaling the fruit at maturity; fruit oval, very obscurely 



umbonate. 



Autumnal phase remaining erect and simple or late in the season producing branches from 

 the third or fourth node, the branches nearly as long as the primary culm, rarely again branch- 

 ing; winter rosettes appearing late, the blades 3-10 cm. long. 



Type locality: Florida. 



Distribution: North Carolina to Florida and Louisiana; Cuba. 



Illustrations: Bull. U. S. Dep. Agr. Agrost. 17: /. 361; Contr. U. S. Nat. Herb. 15: /. 279. 



