Paspalum 



Paniceae 



149 



50 



Map 266 



Digitaria sanguinalis (U Scop. 



50 



Map 267 

 Leptoloma cognatum (Schult.) Chase 



Miles 



50 



Map 268 



Paspalum f luitans (Ell.) Kunth 



128-161. PASPALUM L. 



[Chase. The North American species of Paspalum. Contr. U. S. Nation. 

 Herb. 28: 1-310. 1929.] 



Racemes more than 10 to a panicle 1. P. fluitans. 



Racemes fewer than 10 to a panicle. 

 Spikelets 2.5-3.2 mm long. 



Spikelets solitary 2. P. drculare. 



Spikelets in pairs 3. P. pubiflorum var. glabrtim. 



Spikelets 1.5-2.4 mm long. 



Blades from sparsely to rather densely pilose, rather thin. 



Spikelets 2 mm long A. P. pubescens. 



Spikelets about 1.5 mm long. (See excluded species no. 77, p. 1029.) . .P. setaceum. 



Blades puberulent on both surfaces, with long hairs intermixed, or the lower 



surface nearly or quite glabrous except a few long hairs along the midrib 



and margin, usually rather firm 5. P. stramineum. 



1. Paspalum fluitans (Ell.) Kunth. (Paspalum mucronatum Muhl. and 

 Paspalum repens Berg.) Map 268. Infrequent to local in the state and 

 restricted to the muddy banks of ponds, sloughs, and streams. The oldest 

 specimen seen was one collected in 1836 near New Albany by Dr. Clapp. 



S. C. to Ind., Kans., and Tex., southw. to Argentina. 



2. Paspalum circulare Nash. Map 269. Infrequent to frequent in the 

 southern part of the state where it is usually found in hard, white clay 

 soil in roadside ditches, low places in woodland, and fallow fields. The 

 specimen from Marion County was found along the Monon Railroad and 

 doubtless was introduced. 



Conn, to N. C. and Miss., northw. to Ind., Kans., and westw. to Tex. 



3. Paspalum pubiflorum Rupr. var. glabrum Vasey. Map 270. Infre- 

 quent in a few of our southern counties. Usually found in moist, 

 sandy soil in ditches and in low ground. It is a common plant in the 

 street gutters in the southeastern part of Mt. Vernon. 



N. C. to Ind. and Kans., southw. to Fla. and Tex. 



