128 



GRAMINEAE. 



VOL. I. 



6. Paspalum psammophilum Nash. 



trate Paspalum. Fig. 293. 



Paspalum prostratum Nash, in Britton, Man. 74. 1901. 



Not Scribn. & Merr. 1901. 

 Paspalum psammophihim Nash; Hitchc. Rhodora 8: 



205. 1906. 



A tufted branching softly pubescent perennial with 

 prostrate culms forming dense mats, flat leaf-blades, 

 and densely pubescent spikelets. Culms ii-3 long; 

 sheaths softly and densely pubescent with short 

 hairs ; blades erect or nearly so, of medium texture, 

 softly and densely pubescent on both surfaces, ciliate 

 on the margins, lanceolate, up to 4' long, 2l"-4" wide ; 

 racemes on the main culm 2, rarely more or only i, 

 2,'-z' long, the rachis less than \" wide; spikelets in 

 pairs, i" long and a little less than i" wide, oval, the 

 first scale 3-nerved, the second usually 2-nerved by 

 the suppression of the midnerve. 



In dry sandy soil, southern New York to Delaware. 



5. Paspalum ciliatifoliumMichx. Ciliate- 

 leaved Paspalum. Fig. 292. 



Paspalum ciliatifolium Michx. Fl. Bor. Am. I : AA. 

 1803. 



A tufted branching perennial, with flat leaf- 

 blades, which are glabrous excepting on the ciliate 

 margins, and glabrous spikelets. Culms ii-2i 

 tall ; sheaths ciliate on the margin ; blades 10' 

 long or less, 3"-8" wide, linear to lanceolate; 

 racemes single, or sometimes in pairs, 2' -4%' long, 

 the rachis V wide or less ; spikelets in pairs, 

 about i" long and less than i" wide, oval to 

 broadly obovate, the two outer scales 3-nerved, 

 or the second one rarely 2-nerved by the suppres- 

 sion of the midnerve. 



In rocky or sandy soil, Maryland to Florida and 

 Mississippi. June-Aug. 



Pros- 



7. Paspalum Bushii Nash. Bush's Pas- 

 palum. Fig. 294. 



Paspalum Bushii Nash, in Britton, Man. 74. 1901. 



A tufted branching perennial, with flat ciliate 

 leaf-blades, and pubescent spikelets. Culms erect 

 or ascending, i-3 tall; sheaths, at least the 

 lower ones, softly pubescent, ciliate on the margin ; 

 blades erect or ascending, rather firm" in texture, 

 softly and densely pubescent on both surfaces 

 with short hairs and with a few long rather stiff 

 hairs intermixed, lanceolate, 2 '-8' long, 2"-8" 

 wide ; racemes usually in pairs on the main culm, 

 2i'-s' long, the rachis less than \" wide; spike- 

 lets in pairs, about i" long, orbicular or nearly 

 so, the empty scales densely pubescent, 3-nerved, 

 or the second sometimes 2-nerved by the suppres- 

 sion of the midnerve. 



In dry soil, Missouri and Nebraska to Texas. 



