HITCHCOCK—MEXICAN GRASSES. 347 
Rance: Warmer regions of both hemispheres. 
HERBARIUM SPECIMENS FROM MEXICO: 
Lower CAuirorNtA: San José del Cabo, Brandegee 6 in 1890. 
Sonora: Alamos, in orchard, Rose, Standley & Russell 13021. Guaymas, Palmer 
35 and 45 in 1887. 
Cumuanvua: Southwestern Chihuahua, Palmer 40 in 1885. 
Sinatoa: Fuerte, sandy soil, Rose, Standley & Russell 13580. Culiacdn, moist 
field, Rose, Standley & Russell 14957. Mazatlan, waste ground, Kose, Standley 
d& Russell 14139. Headwaters of Mazatlan river, Wright 1328. 
Duranco: Durango, along street, Hitchcock 7646. 
TAMAULIPAS: Victoria, Palmer 464 in 1907. 
Trric: Acaponeta, moist ravine, Kose, Standley & Russell 14247. Maria Madre 
Island, Nelson 4305. 
San Luis Porosi: Las Candas, along railway, Hitchcock 5757. 
Jauisco: Guadalajara, Palmer 255 and 478 in 1886; along ditch, road to Barranca 
de Oblatos, Hitchcock 7322. San Nicolas, weed in field, Hitchcock 7231. 
Couma: Colima, in garden, Palmer 21 in 1897, 1263 in 1891. Paso del Rio, 
Emrick 5. Jala, along railway, Hitchcock 7013. Alzada, along railway, 
Hitchcock 7071. 
MicuHoacdn: Morelia, Arséne in 1909. 
FeperaL District: Bourgeau 1030; by ditch, Hitchcock 5948. 
Pursia: Tehuacdn, weed in field, Hitchcock 6065; banks of Atoyac, Nicolas in 
1909. Mount Orizaba, Seaton 50. 
Veracruz: Cordoba, Fink 4; weed, Hitchcock 6404. Coatzacoalcos, Smith 1050. 
Orizaba, Botteri 713; Bourgeau 2634; weed in street, [Hitchcock 6310. Vera- 
cruz, weed, Hitchcock 6570. Antigua, Iiebmann 230. 
Gurrrero: Acapulco, Palmer 120 in 1894. Balsas, weed in field, Hitchcock 6789. 
Oaxaca: North of Tuxtepec, Nelson 365. Tomellin, along ditch, Hitchcock 6234. 
Oaxaca, along street, Hitchcock 6163. 
TaBasco: San Juan Bautista, Rovirosa 14. 
Yucatan: Mérida, Schott 738. 
93. DACTYLOCTENIUM Willd. Enum. Pl. 1029. 1809. 
1. Dactyloctenium aegyptium (L.) Richt. Pl. Eur. 1: 68. 1591. 
Cynosurus aegyptius L. Sp. Pl. 72. 1753. 
Type locality given as ‘‘Africa, Asia, America.”’ 
Rance: Tropical and subtropical regions of both hemispheres. 
HERBARIUM SPECIMENS FROM MEXICO: 
Lower Cauirornia: Cape St. Lucas, Xantus 118. San José del Cabo, Purpus in 
1901; Brandegee 13 and 134 in 1890. 
Sonora: Guaymas, Palmer 328 in 1887; weed in park, Hitchcock 3568. Hermo- 
sillo, along ditch, Hitchcock 3532, 3579. Alamos, arroyo, Rose, Standley & 
Russell 12936. Yaqui River, Palmer 9 in 1869. 
Curnuanua: Southwestern Chihuahua, Palmer 73 in 1885. 
Srvatoa: Mazatlan, Observatory Hill, Rose, Standley & Russell 13679. Topolo- 
bampo, Rose, Standley & Russell 13268. Between Rosario and Acaponeta, 
Rose 1877. 
Duranco: Durango, rich, moist soil in cornfield, Palmer 735 in 1896, along road, 
Hitchcock 7579. Torreén, weed in field, Hitchcock 7555. 
CoaHnuILa: Jaral, Schumann 1761. 
Tamauuipas: La Barra, Palmer 258 and 590 in 1910. 
Trpic: Acaponeta, moist ravine, Rose, Standley & Russell 14263. Marfa Madre 
Island, Nelson 4256, 4295, Maltby 152. Maria Magdalena Island, Nelson 4317. 
Jauisco: Guadalajara, Palmer 435 in 1886; prairie near San Pedro, Hitchcock 7291. 
