214 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
HERBARIUM SPECIMENS FROM Mexico——Continued. 
Jasco: Guadalajara, prairie, Hitchcock 7268. Rfo Blanco, Palmer 197 in 1886. 
La Junta, overhanging bank along railway, Hitcheock 7000. San Nicolas, 
prairie, Hitchcock 7188. Huejuquilla, Rose 2542. 
Guanasuato: Irapuato, dry shrubby hill, Hitchcock 7430. Ac&mbaro, prairie, 
TMitchcock 6939. 
QUERETARO: Querétaro, along irrigation ditch, Hitchcock 5865, 5870 (much 
elongated). 
Hrauco: Pachuca, rocky hill, Hitchcock 6718}. 
Méxrco: Toluca, rocky hill, Hitchcock 6905. Federal District, open grassy 
pasture, Hitchcock 5889. Pedregal, Hitchcock 5950. Olivar, Orcutt 3591. 
Pursia: Tochimilco, Nelson in 1893. Cholula, Nicolas in 1909. 
Veracruz: Orizaba, open rocky hill, Hitchcock 6353. 
More tos: Cuernavaca, prairie, Hitchcock 6861. Yautepec, lava field, Pringle 
11225. 
GUERRERO: Santa Fé, along railroad, Hitchcock 6687. 
Oaxaca: Oaxaca, sterile hill, Hitchcock 6096; Nelson 1576. Cuicatlin, Nelson 1906. 
la. Hilaria cenchroides ciliata Scribn. Proc. Acad. Phila. 1891: 293. 1892. 
Type locality, ‘‘Near Guadalajara,” the type specimen collected in the Valley of 
the Rio Grande de Santiago at Atequiza by Pringle (no. 3128). 
Rance: Pacific slope of Mexico. 
HERBARIUM SPECIMENS: 
Tepic: Tepic, in deserted garden, Palmer 1918 in 1892. Acaponeta, Rose, Stand- 
ley & Russell 14304. 
San Luts Poros: Cardenas, rocky hill, Hitchcock 5774. 
Jarisco: Guadalajara, in shady moist place, Barranca de Oblatos, Hitchcock 
7370. Atequiza, Pringle 3128. Zapotldn, along railway, Hitchcock 7125. 
Couma: Manzanillo, Palmer 1267 in 1890. Armertfa, prairie, [Hitchcock 7022. 
Alzada, prairie, Hitchcock 7077. 
20. PLEURAPHIS Torr. Ann. Lyc. N. Y. 1: 148. pl. 10. 1824. 
KEY TO THE SPECIES. 
Culms smooth... . 2.2... 2.....0 020 c cece ce eee eee eee eee cece e eee. 1. P. mutica. 
Culms felty-pubescent........0000 00000 o cece cece cece cece. 2. P. rigida. 
1. Pleuraphis mutica Buckl. Proc. Acad. Phila, 1862: 95. 1863. 
Milaria mutica Benth. Journ. Linn. Soc. Bot. 19: 62. 1881. 
Type locality, ‘‘Northern Texas.”’ 
RanGE: Southwestern United States to northern Mexico. 
HERBARIUM SPECIMENS FROM MExico: 
Curnuanua: Chihuahua, plains, Pringle 485. Santa Eulalia Plains, Wilkinson 
in 1885. 
CoauuiLa: Torreén, among mesquite bushes, Palmer 506 in 1898. 
2. Pleuraphis rigida Thurb.; S. Wats. Bot. Calif. 2: 293. 1880. GALLETA, 
Hilaria rigida Benth.; Scribn. Bull. Torrey Club 9: 33. 1882. 
Type locality, “Fort Mojave,’ the type specimen collected by Cooper. Thurber 
(loc. cit.) cites Bolander,! the species being mentioned without description and the 
locality given as “Southern California, Dr. Cooper.” The first Cooper specimen 
mentioned by Thurber is taken as the type. 
Rance: Southwestern United States to northwestern Mexico. 
HERBARIUM SPECIMENS FROM MExIco: 
Lower Caurornia: Canyon Cantillas, Orcutt 1145. 
Sonora: Colonia Dfaz, Mearns 2848. 
1 Trans. Agr. Soc. Calif. 1864-5: 137. 1865. 
