9 



PASPALUM NOTATUM Fliigge, Monng. 106 (1810). 



LuH SlhUij^, altitude 2,000 m., State of Oaxa.-a, o:r, ('. L. Smith, September S, 1894; 

 Coliiiia, 1:>S E. Palmer, Augunt, 1897. 



PASPALUM PANICTJLATUM L. Syst. Nat. e.l. 10, 855 (1758-59). 



Coatzacoaleoi^, Isthmus of Tehuantepec, State of Vera Cruz, 1058 C. L. Smith, March 

 16, 18^5; Rosario, State of Sinaloa, 1545 J. N. Rose, July 7, 1897; Colima, 18 E. 

 PaluuT, July, 1897. 



Paspalum plicatulum Michx. Fl. Bor. Am. 1: 45 (1803). 



Coatzacoalcos, Isthuius of Tehuantepec, State of Vera Cruz, 1054 C. L. Smith, March 

 12, 1895; between Rosario and Acaponeta, State of Sinaloa, 1885 J. N. Rose, 

 July 28, 1897; foothills of the Sierra ]Madre ^Mountains, near Pedro Paulo, Terri- 

 torio de Tepic, 1961 J. N. Rose, August 3, 1897; near Acaponeta, Territorio de 

 Tepic, 3294 J. X. Rose, July 30, 1897; Colima, 144 E. Palmer, August, 1897. 



PASPALUM PROSTRATUM Scribn. & Merrill, sp. now {Pse^idocrtrsld) . 



A low, diffuse, spreading perennial with slender culms, broad rachis, and ovate- 

 lanceolate leaves. Culms, 2 to 3 dm. long, prostrate, finally erect, glabrous, 

 rooting at the lower nodes; nodes glabrous; sheaths loose, compressed, striate, 

 smooth below, sparingly pilose above and on the margins, the lower ones 

 shorter than or about equaling the internodes, the upper one elongated; 

 ligule nearly obsolete; leaf-blades 1.5 to 3.5 cm. long, 5 to 10 mm. wide, 

 rounded or truncate at the base, acute at the apex, pilose beneath and more 

 sparingly so above, serrulate-scabrous on the cartilaginous margins, mid- 

 nerve somewhat prominent on the lower surface for one-third the length of the 

 leaf, vanishing. Primary axis 6 to 10 cm. long, glabrous; racemes 5 to 10, 

 solitary, remote, alternate, spreading, l)earded at the axils, the lower ones 2.5 

 cm. long, the upper ones shorter; partial rachis 2 to 3 mm. wide, thin, undulate- 

 striate on the back, al)ruptly acute, smooth or serrulate-scabrous on the margins. 

 Spikelets alternate, imbricate in two rows, short-pedicellate, elliptical-ovate, 

 obtuse, smooth, 2 mm. long; first glume equaling the flowering glume, obtuse, 

 thin, hyaline, 3-nerved, the midnerve faint, the marginal ones more prominent; 

 second glume equaling the flowering glume, more firm in texture, 3 or faintly 5 

 nerved, slightly sulcate; flowering glume elliptical, obtuse, very smooth. Palea 

 equaling the glume, smooth, plane. 



Type specimen 3343 C. (i. Pringle, low lands near Patzcuaro, State of Michoacan, 

 November 9, 1890. 



This species belongs in the section Pseudoceresia and is distinguished from Paspalum 

 (jrac'de Rudge by its habit of growth, shorter leaves, solitary racemes, and 

 larger spikelets. Distriiiuted as P<i,spalum gracilc Rudge. 



PASPALUM PROSTRATUM PYGM-ffiUM Scribn. & Merrill, var. nov. 



A low, densely c&espitose form 3 to 5 cm. high, with loose, pilose sheaths, densely 

 pilose leaves 1 to 2.5 cm. long, 1 to 3 mm. wide, and short inflorescence of 1 to 

 3 spikes, which are 1 cm. long or less. Rachis and spikelets as in the species. 



Type specimen 7167 C. G. Pringle, Pedrigal, altitude 2,600 m. (8,500 feet). Valley of 

 Mexico, Federal District, September 30, 1896. In dry places by the railroad 

 track. 



Paspalum pubiflorum Rupr. Bui. Acad. Brux. 9: 237 (1842). 



Durango, State of Durango, 871 E. Palmer, November, 1896; Torreon, State of Coa- 

 huila, 515 E. Palmer, October, 1898; near Colotlan, State of Jalisco, 3602 (in 

 part) J. N. Rose, August 28, 1897. 



PASPALUM ROSEI Scribn. & Merrill, sp. nov. (Fig. 2.) 



A densely csespitose, simple, erect, glabrous perennial, about 6 dm. high with elon- 

 gated leaves and long-exserted inflorescence of 2 or 3 slender, divergent spikes. 

 Culms slender, smooth; nodes pil(jse; sheaths striate, scabrous, short; ligule 

 very short, ciliate-f ringed; leaves linear, plane or folded, acute, those of the 



