230 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
Spikelets not over 2 mm. long, 
turgid. 
Racemes 1 to 3 at the summit of 
the culm, naked, raceme- 
bearing branches from the 
upper sheaths; culms slender; 
spikelets broadly obovate. 
Spikelets glabrous............. 15. P. stramineum, 
Spikelets pubescent. 
Blades ciliate on the margin, 
otherwise glabrous or 
nearly s0................ 14. P. cilhhatifolium. 
Blades pilose on the upper 
surface, more or less pu- 
bescent beneath......... 13. P. setaceum. 
Racemes 4 to 12. 
Spikelets glabrous; _ plants 
branching................- 20. P. squamulatum, 
Spikelets densely pubescent. 
Spikelets elliptic, 2mm. long; 
culms simple, sometimes 
1 meter or more high; 
sheaths and blades pu- 
bescent...............2.. 36. P. tenellum. 
Spikelets broadly ovate, 
about 1.5 mm. long; 
culms freely branching.. 21. P. lentiginosum. 
1. Paspalum repens Berg. Act. Helv. Phys.-Math. 7: 129. pl. 7. 1772. 
Ceresia fluitans Ell. Bot. S. C. & Ga. 1: 109. 1816. 
Paspalum mucronatum Muhl. Descr. Gram. 96. 1817. 
Paspalum fluitans Kunth, Rév. Gram. 1: 24. 1829. 
Type locality, ‘in Surinam.”’ 
Rance: Southern United States to South America. 
HERBARIUM SPECIMEN FROM Mexico: 
Taxsasco: San Juan Bautista, Rovirosa 44, 
2. Paspalum longicuspe Nash, N. Amer, Fl. 17: 172. 1912. 
Type locality, ‘‘near Guadalajara, Jalisco,” the type specimen collected by Pringle 
(no. 3854). 
Rance: Known only from Jalisco. 
HERBARIUM SPECIMENS: 
Jauisco: Guadalajara, floating in water, Pringle 3854. Orozco, in deeper part 
of large pond, among water lilies, Hitchcock 7386. 
8. Paspalum acuminatum Raddi, Agrost. Bras. 25. 1823. 
Type locality, Brazil. 
Rance: Southern Mexico to Paraguay. 
HERBARIUM SPECIMEN FROM Mexico: 
MicHoacdn: Morelia, Arséne in 1909. 
4. Paspalum prostratum Scribn. & Merr. U. S. Dept. Agr. Div. Agrost. Bull, 24: 
9. 1900. 
Paspalum prostratum pygmaeum Scribn. & Merr. U. 8. Dept. Agr. Div. Agrost. 
Bull. 24: 9. 1900. 
Type locality, ‘‘low lands near Patzcuaro, State of Michoacan,” the type specimen 
collected by Pringle (no. 3343). 
