HITCHCOCK—-MEXICAN GRASSES. | 199 
HERBARIUM SPECIMENS FROM MEXICO: 
Lower CAuirorNIA: San Francisquito Mountains, Brandegee in 1890. 
Cumvuanua: Chihuahua, rocky hill, Hitchcock 7786; Pringle 495. Southwestern 
Chihuahua, Palmer 26 in 1885. 
San Luis Porosi: San Luis Potosi, Parry & Palmer 964; Schaffner 1063. Las 
Canéas, prairie, Hitchcock 5768. 
Duranco: Durango, abundant in the mountains, growing in bunches, Palmer 
383: common on the side of rough hills, Palmer 858a in 1896; dry ground, 
Hitchcock 7596; rocky hill, Iron Mountain, Hitchcock 7625. Otinapa, Palmer 
345 in 1906. 
Jarisco: Guadalajara, side of Barranca de Oblatos, Hitchcock 7344, Palmer 467 in 
1886. Rfo Blanco, Palmer 303 in 1886. Zapotlan, hillside in pine woods, 
Hitchcock 7244. 
QueréTaRo: Between San Juan del Rio and Cadereyta, Rose, Painter & Rose 9696. 
Couma: Alzada, open hill, Hitchcock 7056. 
Micuoacdn: Morelia, Arsene 2535. 
FEDERAL District: Lava rock, Pedregal, Hitchcock 5938, 5951. Churubusco, 
Orcutt 4322. 
Moretos: Hills above Cuernavaca, Pringle 6514. 
Veracruz: Mirador, Liebmann 88, 89, 90. Zacuapan, dry meadows, Purpus 
1998, 2452. Orizaba, savannas, Bourgeau 3133, 3358; Miller 2085. Tierra 
Blanca, Ross 889. 
GuERRERO: Balsas, prairie on high hill, Hitchcock 6793. 
Oaxaca: Las Sedas, Conzatti 2010, Smith 953. 
2. Trachypogon gouini Fourn. Mex. Pl. 2: 66. 1886. 
Type locality, “Veracruz,” the type specimen collected by Gouin (no. 59). 
Ranoe: Veracruz and Cuba. 
HERBARIUM SPECIMEN FROM MEXICO: 
Veracruz: Veracruz, low sandy prairie back of city, Hitchcock 6547. 
12. ELYONURUS Humb. & Bonpl.; Willd. Sp. Pl. 4: 941. 1806. 
KEY TO THE SPECIES. 
Rhizomes absent; culm hirsute below the nodes.........- 1. E. barbiculmis. 
Rhizomes present; culm glabrous. 
Spikelets not hirsute on back........------- 02 eee eee 2. E. tripsacoides. 
Spikelets hirsute on back....-..------+++-++55 7070 2a. E. tripsacoides ciliaris. 
1. Elyonurus barbiculmis Hack. in DC.-Monogr. Phan. 6: 339. 1889. 
Type locality southwestern United States, ‘“W. Texas * * * New Mexico 
* * * Arizona,”’ being cited. 
Rance: Texas to central Mexico. 
HERBARIUM SPECIMENS FROM MEXICO: 
CurmuanHua: Rocky hills near Chihuahua, Pringle 423. Mifiaca, on the mesa, 
Hitchcock 7745. Southwestern Chihuahua, Palmer 22 in 1885. 
Duranco: Durango, rocky hill, Hitchcock 7651; in bunches at base of hills, 
Palmer 549 in 1896. Dos Cajetes, Palmer 829 in 1896. 
ZacATECAS: San Juan Capistrano, Rose 2407. 
AGUASCALIENTES: Aguascalientes, along dry river, Hitchcock 7465. 
Jarisco: Guadalajara, dry open ground along rim of Barranca de Oblatos, Hitch- 
cock 7329, 7331. San Nicolfs, sterile clay hill, Hitchcock 7218. 
Moretos: Cuernavaca, rocky hill, Hitchcock 6846. 
Pursia: Laguna Chapulco, Nicolas in 1909. 
Veracruz: Mirador, Liebmann 111. 
