12 



POACEAE. 



Racemes a pair at the top of the culm. 



Spikelets flat on both sides, long-ciliate. 5. P. conjugatum. 



Spikelets plano-convex, not ciliate. 



Spikelets ovate, the convex side appressed-pubescent. 6. P. distichum 



Spikelets ovate-lanceolate, glabrous. 7. P, vaginatum. 



1. Paspalum ciliatifdlium 



Michx. CiLIATE-LEAVED PASPALUM. 



(Fig. 8.) Culms tufted, erect, 1°- 

 21° tall, smooth and glabrous; 

 leaf-sheaths ciliate on the over- 

 lapping margin, otherwise gla- 

 brous; blades 2'-10' long, 3"-8" 

 wide, smooth and glabrous on both 

 surfaces, the margins conspicu- 

 ously ciliate with long hairs; 

 racemes single, or sometimes in 

 2 's, 2'-4i' long; spikelets in pairs, 

 about 1" long, glabrous, oval to 

 broadly obovate, the 2 outer scales 

 3-nerved or the second one rarely 

 2-nerved by the suppression of the 

 midnerve, both glabrous. [^Pasya- 

 lum setaceum of Reade and Lef roy.] 



Common on dry hillsides. Na- 

 tive. Southeastern United States. 

 The seeds were probably transported 

 to Bermuda by birds. Flowers in 

 summer and autumn. 



The Bermuda plant is referred by Hitchcock and Chase to Paspalum pro- 

 pinquum Nash, not here regarded as a distinct species. 



2. Paspalum caespitosum Fluegge. 

 Slender Paspalum. (Fig. 9.) Tufted; 

 culms slender, l''-2° high. Leaves glabrous, 

 narrowly linear, flat, 2'-8' long, W-W 

 wide, erect or nearly so, with glabrous 

 sheaths; racemes 2-6, erect, i'-2' long, the 

 rachis very narrow; spikelets in pairs, a 

 little less than 1" long and nearly i" wide, 

 elliptic, the first scale wanting, the second 

 and third sparingly papillose-pubescent with 

 appressed hairs, 3-nerved, the fruiting scale 

 yellowish-white. 



Rocky cliffs and on Hall's Island, Harring- 

 ton Sound, and on hillsides, west side of Castle 

 Harbor, 1912. Native. Florida and West Indies. 

 This may be the grass recorded by Reade, Le- 

 froy and Hemsley as Paspalum filiforme Sw., 

 no Bermuda specimen of which could be found 

 in the Kew Herbarium. Flowers in summer 

 and autumn. 



