314 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Range: Sea coasts from Virginia to Costa Rica and the West Indies; also in Lower 
California. 
HERBARIUM SPECIMENS FROM MEXICO: 
Lower Cauirornia: Santa Margarita Island, Brandegee in 1889. 
Sonora: Guaymas, Palmer 338 in 1887. 
TaMmauLipas: Tampico, brackish marsh, Hitchcock 5781. 
Veracruz: Veracruz, sandy beach, Hitchcock 6567; sand dunes, Pringle 8469. 
69. BLEPHARONEURON Nash, Bull. Torrey Club 25: 88. 1898. 
1. Blepharoneuron tricholepis (Torr.) Nash, Bull. Torrey Club 25: 88. 1898. 
Vilfa tricholepis Torr. U. 8. Rep. Expl. Miss. Pacif, 4: 155. 1857. 
Sporobolus tricholepis Torr.; Coulter, Man. Rocky Mount. 411. 1885. 
Type locality, ‘Sandia mountains, New Mexico.” 
Rance: Texas to Colorado and Utah, and south in the mountains to southern Mexico. 
HERBARIUM SPECIMENS FROM Mexico: 
Sonora: San José Mountains, Mearns 997. 
CurmuaHuaA: Sierra Madre near Colonia Garcfa, hillside meadow, Townsend & 
Barber 333. Mapula Mountains, thin soil of summits, Pringle 822. South- 
western Chihuahua, Palmer 6 in 1885. Sanchez, rocky pine woods, Hitch- 
cock 7670. 
Duranco: Dos Cajetes, side of arroyo, Palmer 833 in 1896. 
Mexico: Cima, Orcutt 3796. Ixtaccihuatl, rocks, subalpine region, Purpus 1634. 
Federal District, Pringle 6485. 
70. EPICAMPES Presl, Rel. Haenk. 1: 235. pl. 39. 1830. 
KEY TO THE SPECIES. 
Inflorescence strict, dense, and spike-like. 
Glumes awned; lemma awnless or sometimes awned............ 1. E. leptoura. 
Glumes awnless. 
Glumes exceeding the lemma, 6 to 8 mm. long, acuminate; 
panicle mostly dark-colored; ligule elongated........ 2. E. macroura. 
Glumes shorter than the lemma, 2 to 3 mm. long, obtuse; 
panicle pale; ligule short....................22....-. 3. E. rigens. 
Inflorescence often narrow, but not spike-like. 
Panicle open, the branches slender, spreading, naked below; 
spikelets about 2mm. long..........................--. 9. E. bourgaei. 
Panicle narrow, the branches ascending or appressed. 
Lemmas villous; glumes usually villous; sheaths usually 
softly pubescent.............. 0000002 c cece eee ee eee 4. E. lanata, 
Lemmas not villous; sheaths and glumes smooth or scabrous. 
Sheaths not compressed-keeled; ligule long, indurated. 5. E. ligulata. 
Sheaths compressed-keeled; ligule if long, lax and 
membranaceous. 
Spikelets 2 mm. long, often short-awned; ligule 
short.........2 202.2202 c eee eee eee 8. E. stricta. 
Spikelets about 3 mm. long. 
Lemma pubescent on lower half.............. 6. E. pubescens, 
Lemma smooth or pubescent on callus only... 7. E. robusta. 
Two species of which there is insufficient material are not included in the above 
key: E. anomala Scribn., based on Pringle’s no. 1423 from the State of Chihuahua 
(which appears to be an abnormal form of E. ligulata) and E. macrotis Piper, based 
on Rose’s no. 3528 from the State of Zacatecas. 
