HITCHCOCK—MEXICAN GRASSES. 351 
Rance: Pacific slope of southern Mexico. 
HERBARIUM SPECIMENS: 
Jauisco: Valencia, along railway, Hitchcock 7004. Guadalajara, in water of ditch, 
road to Barranca de Oblatos, Hitchcock 7317. 
Moretos: Cuernavaca, shallow water, Pringle 6664; along ditch, in damp soil, 
bases creeping in water, Hitchcock 6859. 
GUERRERO: Vista, along track, Hitchcock 6696. 
8. Leptochloa fascicularis (Lam.) Gray, Man. 588. 1848. 
Festuca fascicularis Lam. Tabl. Encycl. 1: 189. 1791. 
Type locality, ‘‘Amer[ica] Merid{ionalis].”’ 
Rance: Northern United States to southern Mexico and in the West Indies. 
HERBARIUM SPECIMENS FROM MEXICO: 
Sonora: Guaymas, Palmer 691 in 1887. 
Cummuanvua: Chihuahua, in shallow water, Pringle 813. 
Duranco: Torreon, along ditch, Hitchcock 7729. Durango, in ditch, Hitchcock 
7567; along water courses, Palmer 254 in 1896. 
AGUASCALIENTES: Aguascalientes, edge of pond, Hitchcock 7494. 
Sawn Luts Potosi: San Luis Potosf, irrigation ditch, Hitchcock 5682; Schaffner 152. 
Jauisco: Orozco, near large pond, [Hitchcock 7377. 
Guanasuato: Irapuato, moist, sandy-clay plain, Hitchcock 7389. 
QuERETARO: Querétaro, in water of irrigation ditch, Hitchcock 5836. 
Moretos: Valley near Jojutla, Pringle 9595. 
9. Leptochloa imbricata Thurb. in 8. Wats. Bot. Calif. 2: 293. 1880. 
Type locality, southern California, collections from ‘‘Larkins Station, San Diego 
County” and ‘‘Tort Yuma” cited. 
RanaeE: Texas to California and south to Argentina. 
HERBARIUM SPECIMENS FROM MEXICO: 
Lower Cauirornia: Calexico, along draw, Chase 5518. Maleje, Gulf of Cali- 
fornia, Palmer 47 in 1887. San José del Cabo, Purpus 312. Santa Agueda, 
Palmer 216 in 1890. 
Sonora: Yaqui River, Palmer 5 in 1869. Sonoyta River, Mearns 2741. Guay- 
mas, Palmer 47 in 1887. Hermosillo, by ditch in meadow, Hitchcock 3577. 
SrvaLoa: Headwaters of Mazatlan River, Wright 1317a. 
Jauisco: Guadalajara, Palmer 331 in 1886. 
GuanasuaTo: Irapuato, low ground, Hitchcock 7432. 
Oaxaca: North of Tuxtepec, Nelson 367. 
95. GOUINIA fourn. Mex. PI. 2: 103. 1886. 
KEY TO THE SPECIES. 
Spikelets awnless; perfect floret 1......-.--------+-+-+2++-----++-- 1. G. brandeget. 
Spikelets awned; perfect florets 2 to several. 
Awns longer than the lemmas; sheaths smooth or nearly so; 
lemmas pubescent at base, not long-pilose. .....-------- 4, G. virgata, 
Awns shorter than the lemmas; sheaths scabrous; lemmas long- 
pilose on the nerves and marginal space except at summit. 
Spikelets (excluding the awns) 12 to 15 mm. long, the florets 
rather distant; panicle branches ascending. .......-- 2. G. mexicana. 
Spikelets (excluding the awns) 6 to 10 mm. long, the florets 
approximate; panicle branches divaricate...........- 3. G. latifolia. 
81544 °—13——12 
