HITCHCOCK—-MEXICAN GRASSES. 317 
71. POLYPOGON Desf. Fl. Atlant. 1: 66. 1798. 
KEY TO THE SPECIES, 
Plants annual; inflorescence a compact spike-like panicle; 
glumes 2-lobed at apex............. 20.200. e eee ee eee 1. P. monspeliensis. 
Plants perennial; glumes tapering into the awn, not lobed. 
Panicles spike-like, culms spreading or decumbent; glumes 
about 2mm. long....-...-.... 22.20. e ee eee eee eee 2. P. littoralis. 
Panicles narrow but loose, more or less interrupted at base, 
usually 20 to 30 cm. long; glumes about 3mm. long... 3. P. elongatus. 
1. Polypogon monspeliensis (L.) Desf. Fl. Atlant. 1: 67. 1798. 
Alopecurus monspeliensis L. Sp. Pl. 61. 1753. 
Type locality, Montpelier, France. 
Rance: Pacific slope from Alaska to Mexico; occasional on the Atlantic coast; intro- 
duced from Europe. . 
HERBARIUM SPECIMENS FROM MEXICO: 
Lower CaurrorniaA: Tecate River, near Monument no. 245, Schoenfeldt 3730. 
Nachognero Valley, Mearns 3370. Northern Lower California, Orcutt in 1886. 
CurmausnHva: Banks of Rfo Galleana, in the pueblo, Hartman 661. 
2. Polypogon littoralis (With.) Smith, Comp. Fl. Brit. 13. 1800. 
Agrostis littoralis With. Bot. Arr. Veg. Brit. ed. 3. 2: 129.1796. 
Type locality, ‘‘ Wells, on the Norfolk coast,’’ England. 
Rance: Vancouver Island to southern Mexico. 
HERBARIUM SPECIMENS FROM MEXICO: 
Puesia: Tehuacén, by streams, Pringle 6772; along ditch, Hitchcock 6039. 
Puebla, Nicolas in 1909. 
3. Polypogon elongatus H. B. K. Nov. Gen. & Sp. 1: 134. 1816. 
Type locality, “‘in temperatis regni Quitensis prope Chillo.”’ 
RanGE: Northern Mexico to South America. 
HERBARIUM SPECIMENS FROM MEXICO: 
Duranco: Durango, shaded edge of water ditch, Palmer 162 in 1896. Nombre 
de Dios, edge of a water canal, Palmer 111 in 1896. San Ramén, Palmer 76 
in 1906. 
CoaHuILA: Saltillo, along ditches, Palmer 2 in 1898, Hitchcock 5651. 
San Luis Porosi: San Luis Potosf, irrigation ditch in or near the water, Hitchcock 
5684. 
Guanajuato: TIrapuato, along ditch, Hitchcock 7435. 
QUERETARO: Querétaro, irrigation ditch, Hitchcock 5816. 
FEDERAL District: Wet meadows, Pringle 8508; along ditch, Hitchcock 5886, 
5927. Valley of Mexico, Bourgeau 216. 
PuesBLa: Chinantla, Liebmann 617. 
Veracruz: Orizaba, Mohr in 1857. 
Moretos: Cuernavaca, ditch, Hitchcock 6848. 
Oaxaca: Along ditch between Tule and Oaxaca, Hitchcock 6179. 
72. CINNA L. Sp. Pl. 5. 1753. 
1. Cinna poaeformis (H. B. K.) Scribn. & Merr. U.S. Dept. Agr. Div. Agrost. Bull. 
24: 21. 1901. 
Deyeuxia poaeformis H. B. K. Nov. Gen. & Sp. 1: 146. 1816. 
Type locality, ‘‘in regno Mexicano, in radicibus montis ignivomi Jorullo.”’ 
RanGeE: Highlands, southern Mexico to Costa Rica. 
