HITCHCOCK—-MEXICAN GRASSES. 225 
Rance: Southern United States to South America. 
HERBARIUM SPECIMENS FROM MEXICO: 
Duranco: Durango, dry ground, Hitchcock 7576, Palmer in 1896. 
AGUASCALIENTES: Aguascalientes, along pond, Hitchcock 7488. 
San Luis Porosf: Las Candas, open moist soil, Hitchcock 5758; fields, Pringle 
3904. Cardenas, irrigated field, Hitchcock 5752. 
Jauisco: San Nicolds, prairie, Hitchcock 7192. Zapotlin, railway right of way, 
Hitchcock 7136. Guadalajara, prairie, Hitchcock 7320. 
Guanasuato: Ac4mbaro, along ditch, Hitchcock 6937. Irapuato, moist sandy- 
clay plain, Hitchcock 7410. 
Cotma: Jala, along railway, Hitchcock 7010. Colima, Orcutt 4616. 
MicHoacANn: Urudpan, weed in cornfield, Hitchcock 6990. 
VeRAcRUZz: Orizaba, roadside ditch, Hitchcock 6315. Jalapa, weed along rail- 
way, Hitchcock 6653. Cérdoba, Hitchcock 6405. 
Moretos: Cuernavaca, weed in garden, Hitchcock 6853; Orcutt 3890. 
Oaxaca: Oaxaca, weed in field, Hitchcock 6122. Valley of Oaxaca, Conzatti & 
Gonzalez 350a. 
2. Brachiaria meziana Hitchc. Contr. U. 8. Nat. Herb. 12: 140. 1908. 
Type locality, ‘low moist places on the plains of Mexico,’’ Federal District, the 
type specimen collected by Pringle (no. 9592). 
Rance: Throughout interior Mexico. 
HERBARIUM SPECIMENS: 
CurHuanua: Valley near Chihuahua, Pringle 375. 
Duranao: Durango, low bottom lands, Palmer 533 in 1896; prairie of valley, 
Hitchcock 7619. 
CoauuILa: Saltillo, along small irrigation ditch, Hitchcock 5593. 
ZacaTEcas: Zacatecas, in gulch in dry sterile hills, Hitchcock 7516. 
AGUASCALIENTES: Aguascalientes, along ditch, Hitchcock 7492. 
San Luis Porosf: C4rdenas, along railway, Hitchcock 5770. San Luis Potosf, 
alfalfa field, Hitchcock 5668. 
Jauisco: Rio Blanco, Palmer 254 in 1886. San Nicolas, cornfield, Hitchcock 7225. 
GuanasuaTo: Irapuato, moist sandy-clay plain, Hitcheock 7416. Acdmbaro, 
along railway, Hitchcock 6928. 
QUERETARO: Querétaro, edge of field, Hitchcock 5802. 
Mexico: Xochimilco, pasture, Hitchcock 5891. Federal District, San Angel, 
Bourgeau 222; Orcutt 3692; prairies near Mexico City, Bourgeau 430; Cerro de 
Guadalupe, Pringle 9592. 
PueEBia: Puebla, Nelson in 1893. 
Oaxaca: Valley of Oaxaca, Conzatti & Gonzdlez 348. 
33. AXONOPUS Beauv. Ess. Agrost. 12, 154. 1812. 
KEY TO THE SPECIES. 
Plants stoloniferous; blades 5 to 12 mm. wide. 
Racemes 2 or 3, rarely 4, less than 10 cm. long; spikelets pubes- 
cent, acuminate....................-2...2.22-222-.-.-. 2. A. compressus. 
Racemes 6 or more, 10 to 25 cm. long; spikelets glabrous, blunt. 1. A. deludens. 
Plants erect, not stoloniferous; blades not over 4 mm. wide, usua!ly 
less. 
Spikelets 4 mm. long............0. 2 ce cece cece ee ee ence eee ee O AL rset. 
Spikelets less than 3 mm. long. 
Racemes 3 to several; nodes pubescent..............-..-- 4. A. lariflorus. 
Racemes 2 or 3; nodes glabrous.......,-....-.--+++++-++. 3. A. marginatus, 
