GENUS 15. 



GRASS FAMILY. 



14. Paspalum circulate Nash. Round- 

 flowered Paspalum. Fig. 301. 



Paspalum circulare Nash, in Britton. Man. 73. 1901. 



A tufted perennial with flat leaf-blades, and 

 orbicular glabrous spikelets. Culms ii-3i tall; 

 leaf-sheaths tuberculate-hirsute with spreading or 

 ascending hairs, compressed ; blades erect, more 

 or less hirsute on both surfaces, i long or less, 

 2i"-4" wide ; racemes 2-4, erect or ascending, 

 2i'-4' long, the rachis about \" wide ; spikelets 

 singly disposed, about \\" in diameter, their thick- 

 ness about one quarter their diameter, the outer 

 2 scales thin and usually wrinkled when dry, 5- 

 nerved, the lateral nerves near the margin and 

 approximate, quite distinct. 



In fields, New York to Missouri, south to North 

 Carolina and Texas. July-Sept. 



15. Paspalum laeviglume Scribn. Smooth- 

 scaled Paspalum. Fig. 302. 



Paspalum remotum glabmm Vasey, Bull. Torrey 

 Club 13: 166. 1886. Not P. glabmm Poir. 1804. 



Paspalum pubiflorum glabntm Vasey ; Scribn. Bull. 

 Tenn. Exp. Sta. 7: 32. 1894. 



Paspalum laeviglume Scribn.; Nash, in Small, Fl. 

 SE. U. S. 75. 1903. 



A stout glabrous perennial, usually rooting at 

 the lower nodes, with flat leaf-blades, and gla- 

 _brous spikelets. Culms i2-4* tall, the nodes 

 pubescent; leaf-sheaths glabrous, excepting the 

 hirsute margins; blades 4'-i6' long, s"-io" wide, 

 linear, glabrous on both surfaces ; racemes 4-8, 

 spreading or ascending, the lower ones commonly 

 2'-4' long; spikelets in pairs, ii"-ii" long, abo'ut 

 i" broad, oval to broadly obovate, the first scale 

 3~5-nerved, the second 5-7-nerved. 



^ In moist places, Maryland and Kentucky to North 

 Carolina and Texas. June-Oct. 



16. Paspalum Boscianum Fluegge. Bosc's 

 Paspalum. Fig. 303. 



Paspalum virgatiim Walt. Fl. Car. 75. 1788. Not L 



1/53- 

 Paspalus Boscianus Fluegge, Gram. Monog. 170. 



1810. 



Paspalum purpurascens Ell. Bot. S. C. & Ga. i : 108. 

 1817. 



A rather stout glabrous perennial with com- 

 pressed culms, which often root at the lower 

 nodes, flat leaf-blades, and glabrous spikelets. 

 Culm i*-4 tall; leaf-sheaths compressed, gla- 

 brous, or the basal ones hirsute ; blades of medium 

 texture, hirsute above near the base, linear, i 

 long or less, ii"-s" wide; racemes 2-13, spread- 

 ing or ascending, 1^-4' long, the straight rachis 

 i^-ii" wide; spikelets in pairs, i"-i" long, l"~ 

 i" wide, broadly obovate, the first scale 5-nerved, 

 the second 3-nerved. 



In meadows and moist places, Virginia and Ten- 

 nessee to Florida, west to Texas. Aug. and Sept. 



