HITCHCOCK—MEXICAN GRASSES. 255 
42. OPLISMENUS Beauv. FI. Owar. 2: 14. pl. 58. f. 1. 1809. 
KEY TO THE SPECIES. 
Spikelets loosely arranged on the elongated axis of the spikes....... 1. O. rariflorus. 
Spikelets compactly arranged on the short axes of the spikes. 
Spikes villous with long hairs................----+------------ 3. O. cristatus. 
Spikes not villous, or with a few long hairs..................+.-. 2. O. hirtellus. 
1. Oplismenus rariflorus Presl, Rel. Haenk. 1: 320. 1830. 
Type locality, ‘‘ad Acapulco.” 
Rance: Mexico to South America. 
HERBARIUM SPECIMENS FROM MEXICO: 
SmvaLoa: Lodiego, moist shady place in deep canyon, Palmer 1656 in 1891. 
Terric: Tepic, shady bank of arroyo, Palmer 1931 in 1892. 
Jauisco: Zapotlin, open pine woods, hillside, Hitchcock 7237. 
Couma: Mazanillo, Palmer 1090 in 1890. 
Micuoacdn: La Correa, Langlassé 444. Morelia, Arséne in 1909. 
Oaxaca: Sierra de San Felipe, Pringle 4944. Reyes, Nelson 1772. Between 
Galera and Pochutla, Liebmann 372. 
2. Oplismenus hirtellus (L.) Roem. & Schult. Syst. Veg. 2: 481. 1817. 
Panicum hirtellum L. Syst. Nat. ed. 10. 870. 1759. 
Type locality, Jamaica, the type specimen collected by Browne. 
Rance: Mexico and the West Indies to South America. 
HERBARIUM SPECIMENS FROM MEXICO: 
Pursia: Mount Orizaba, Seaton 63. 
Veracruz: Cérdoba, wet springy bank, Hitchcock 6445; in shade of coffee trees, 
Hitchcock 6462. Jalapa, damp shady woods, Hitchcock 6636, 6637; shady 
place near Coatepec, Hitchcock 6681. Orizaba, Bottert 136; Purpus in 1903. 
Colipa, Liebmann 363. Mirador, Nelson 109. Sanborn, Orcutt 3067. 
MoreEvos: Cuernavaca, moist banks, Pringle 6203; damp shady place in ravine, 
Hitchcock 6839. 
Tapasco: San Juan Bautista, Rovirosa 67, 83. 
Curapas: Ocuilapa, table-land, Nelson 3025. 
Quintana Roo: Cozumel, Millspaugh 1483. 
WirHovut LocaLity: Lwebmann 366. 
3. Oplismenus cristatus Presl, Rel. Haenk. 1: 323. 1830. 
Type locality, ‘‘Mexico.” 
Rance: Mexico to South America. 
HERBARIUM SPECIMENS FROM MEXICO: 
Lower CALirorNiA: Miraflores, Brandegee 22 in 1890. Sierra de la Laguna, 
Brandegee 5 in 1890. 
Smvatoa: Lodiego, moist shady rocky canyon, Palmer 1666 in 1891. 
Teric: Tepic, shady banks of arroyos, Palmer 1930 in 1892. 
Jaisco: Guadalajara, Palmer 463 in 1886; along a stone wall near San Pedro, 
Hitchcock 7279. Zapotl4n, damp shady place on rocks, hill, Hitchcock 7250. 
Cotma: Colima, Palmer 1258 in 1891; Orcutt 4529. 
Micnoacdn: La Correa, Langlassé 440. Morelia, Arséne in 1909. 
Veracruz: Zacuapan, fields, Purpus 2893. 
MorEtos: Cuernavaca, shaded banks, Pringle 6209; lava fields near Yautepec, 
Pringle 11330; Bourgeau 1301. 
GUERRERO: Acapulco, Palmer 35 in 1894. 
Oaxaca: Cuicatlén, Nelson 1649. Guatulco, Liebmann 375. 
Yucatdn: Without locality, Schott 55. 
81544°—13——-6 
