316 CONTKIBUTIONS FEOM THE NAUONAL HERBARIUM. 



Central and eastern United States and Province of Habana, Cuba. Originally 

 described from Carolina. 



40. Paspaluin debile Michx. Fl. Bor. Amer. 1: 44. 1803. 



Perennial, witli a cluster of short leafy shoots at base, the blades flat, rather 

 thin, pilose on both surfaces, conspicuously ciliate ; culms slender, ascending ; 

 racemes 4 to 6 cm. long, usually 2 on the terminal culm, solitary on the axillary 

 peduncles, the pale, minutely pubescent, broadly ovate spikelets 1.6 to 1.8 mm. 

 long. 



Open savannas and slopes, southeastern United States and In Cuba (Herra- 

 dura, Hitchcock All), the Cuba specimens less strongly pubescent than typical. 

 Originally described from the Carolinas and Georgia. 



A specimen collected in Inagua, Bahamas, in 1890, by A. S. Hitchcock is 

 allied to the preceding, but at present we are unable to refer it to any known 

 species. It seems to be nearest to P. psammophiUim Nash, of the Middle At- 

 lantic States, but the spikelets are narrower than in that species and the plant 

 much smaller. 



41. Paspalum decumbens Swartz, Prodr. Veg. Ind. Occ. 22. 1788.* 

 Paspalum pedunculatum Desv. ; Poir. in Lam. Encycl. Suppl. 4: 315. 1816. 

 Panicum decumbens Roem. & Schult. Syst. Veg. 2: 429. 1817. 

 Paspalum vaginiflorum Steud. Syn. PI. Glum. 1: 19. 1854. 

 Dimorphostachys pedunculata Fourn. Mex. PI. 2: 15. 1886. 



A freely branching decumbent perennial with slender compressed culms, 

 velvety foliage, the flat blades 5 to 10 cm. long, 5 to 8 mm. wide, and solitary 

 arcuate racemes usually 2 to 3 cm. long, borne on very slender peduncles, these 

 commonly several from the upper sheaths ; spikelets obovate, 1.5 mm. long, a 

 small first glume present, the second glume about half the length of the fruit. 



Shaded banks and wooded slopes, Central America and the West Indies and 

 northern South America. Paspalum decumbens was described from Jamaica ; 

 P. pedunculatum and P. vaginiflorum from French Guiana. 



Cuba (Province of Pinar del Rio and Isle of Pines), Haiti, Jamaica, Porto 

 Rico, and Trinidad. 



42. Paspalum nutans Dnm. Tabl. Encycl. 1: 175. 1791. 

 Paspalum lloydii Nash, N. Amer. Fl. 17: 178. 1912. 



Resembling the preceding, the culms longer, the foliage not velvety, the 

 tacemes sometimes 2 or 3, the spikelets 1.8 mm. long, the first glume wanting, 

 the second nearly as long as the fruit. 



Shady banks and a weed in fields, Costa Rica and the Lesser Antilles to 

 South America. Originally described from Central America ; P. lloydii de- 

 scribed from Dominica, Lloyd 590 being the type. 



Guadeloupe, Dominica, Grenada, and Trinidad. 



43. Paspalum ciliiferum (Nash) Hitchc. Coutr. U. S Nat. Herb. 12: 201. 1909. 

 Dimorphostacliys ciliifcra Nash in Small, Fl. Southeast. U. S. 78. 1903. 

 Tufted, the slender culms spreading or ascending; blades sparsely pubescent, 



rather thin, flat, usually 10 to 15 cm. long, 8 to 10 mm. wide ; racemes 1 or 2, 

 slightly curved, 5 to 10 cm. long, usually with a tuft of long white hairs at the 

 base ; spikelets about 2.8 mm. long, narrowly obovate, apprcssed-piibescent, the 

 first glume truncate on the primary, acuminate on the secondary, spikelet. 



Thickets and .shaded banks, Florida and Cuba. Originally described from 

 Florida. 



44. Paspalum paniculatum L. Syst. Nat. ed. 10. 2: 855. 1759. 

 Paspalum hcmisphcricum Poir. in Lam. Encycl. 5: 31. 1804. 



* Paspalum decumbens Rottb. 1778 is a nomen nudum. 



