306 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
HERBARIUM SPECIMENS FROM Mexico: 
Lower Cauirornis: San Francisquito Mountains, Brandegee in 1890. 
Tepic: Tepic, shady banks of arroyo, Palmer 1932 in 1892. 
Jatisco: Guadalajara, ledges of barranca, Pringle 1744; Palmer 499 in 1886; side 
of gulch near San Pedro, Hitchcock 7303; side of Barranca de Oblatos, Hitch- 
cock 7340. Chapala, Rose 3464. 
MicHoacdn: Sierra Madre, Langlassé 603. 
VERACRUZ: Escamela, Bourgeau 3272. Orizaba, Miller 2069; mossy ledges, Prin- 
gle 6155; Botteri 696, 1272. Zacuapan, rocky slopes, Purpus 2153. 
Moretos: Cuernavaca, ledges, Pringle 11245. 
Oaxaca: Reyes, Nelson 1822. Paridn Cafion, dry ledges, Pringle 6016, 
2. Pereilema ciliatum Fourn. Mex. Pl. 2: 93. 1886. 
Type locality, Veracruz, ‘‘Orizaba” and ‘‘Cordova” collections cited. 
Rance: Mountains of southern Mexico. 
HERBARIUM SPECIMENS: 
Jauisco: Tequila, dry shaded ledges, barranca, Pringle 4606. 
VERACRUZ: Orizaba, Botteri 708, 711. 
MoreELos: Cuernavaca, Pringle 11243, 11763. 
67. PHLEUM L. Sp. Pl. 59. 1753. 
TIMOTHY. 
1. Phleum alpinum L. Sp. Pl. 59. 1753. 
Type locality, ‘‘in Alpibus,’’ Europe. 
Range: Cooler regions and mountains of the northern hemisphere and extending in 
the high mountains to South America. 
HERBARIUM SPECIMENS FROM Mexico: 
México: Nevado de Toluca, Nelson 22 in 1893. 
Pussia: Peak of Orizaba (Citlaltepetl), near timber line, Purpus 2886; Lieb- 
mann 685. 
68. SPOROBOLUS R. Br. Prodr. Fl. Nov. Holl. 169. 1810. 
KEY TO THE SPECIES. 
Plants annual. 
Glumes unequal, the second as long as the spikelet, the first 
half as long.............2000 20-2 e eee eee ee eee eee 5. S. macrospermus. 
Glumes subequal. 
Glumes about as long as the spikelet, 2 mm. long, 
smooth; spikelets often nodding on the capillary 
pedicels............ 2.2... cece ee eee eee eee e eee 1. S. shepherdi. 
Glumes shorter than the spikelet, 1 mm. long or less. 
Pedicels short, uniformly rather thick, the spikelets 
appressed along the main branches of the 
panicle; glumes smooth, very short, obtuse.. 3. 8. ramulosus. 
Pedicels capillary. 
Pedicels thickened below the spikelet, all 
longer than the spikelets; panicle more 
than half the entire height of the plant; 
glumes often pilose..................... 2. S. confusus. 
Pedicels not conspicuously thickened, the ulti- 
mate lateral ones shorter than the spike- 
lets; panicle less than half the height of 
the plant....2 2.222. oe eee eee 4, §. minutiflorus. 
