386 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
1. Elymus triticoides Buckl. Proc. Acad. Phila. 1862: 99. 1863. 
Type locality, ‘‘Rocky Mountains,’’ the type specimen collected by Nuttall. 
Rance: Western United States and Lower California. 
HERBARIUM SPECIMENS FROM MEXICO: 
LOWER CALIFORNIA: Tecate River, near Monument no. 245, Schoenfeldt 3726. 
Sierras Cantillas, Orcutt 1152. Topo, Orcutt 1162. Las Juntas, Orcutt 1164. 
Mountains, Orcutt in August, 1884. 
2. Elymus pringlei Scribn. & Merr. U.S. Dept. Agr. Div. Agrost. Bull. 24: 30. 1901. 
Type locality, ‘‘in a valley near Tula, State of Hidalgo,’ the type specimen col- 
lected by Pringle (no. 6637). 
Rance: Highlands of Mexico. 
HERBARIUM SPECIMENS: 
San Luis Porosf: Las Candas, rich copse, Hitchcock 5763. 
Hivatco: Ixmiquilpan, river banks, Rose, Painter & Rose 9060. Tula, wet soil, 
Pringle 6639. Dublan, wet soil, Pringle 11222. 
VERACRUZ: Orizaba, roadside ditch, Rfo Blanco, Hitchcock 6316; Botteri 142. 
3. Elymus brachystachyus Scribn. & Ball, U. S. Dept. Agr. Div. Agrost. Bull. 
24: 47. f. 21. 1901. 
Type locality, ‘‘in the Indian Territory,’’ the type specimen collected by Palmer 
(no. 420). 
Rance: Southern United States and northern Mexico. 
HERBARIUM SPECIMENS FROM MEXICO: 
CurauABUA: Chihuahua, along aqueduct, Hitchcock 7771. Valley near Chihua- 
hua, Pringle 505. 
CoaHulILa: Saltillo, along irrigation ditch, Hitchcock 5603; along shady ditch, 
Hitchcock 5622; in old orchard, Palmer 260 in 1898. 
129. SITANION Raf. Journ. de Phys. 89: 103. 1819. 
KEY TO THE SPECIES. 
Glumes cleft into several lobes; lemmas glabrous. ..............-- 1. S. jubatum. 
Glumes entire; lemmas hirsute-scabrous............-.-..-2.------- 2. S. pubiflorum. 
1. Sitanion jubatum J.G. Smith, U.S. Dept. Agr. Div. Agrost. Bull. 18: 10. 1899. 
Type locality, ‘‘Waitsburg, Wash.,’’ the type specimen collected by Horner (no. 
573). 
RanGE: Pacific coast from Washington to Lower California. 
HERBARIUM SPECIMEN FROM MEXxIco: 
Lower Caurrornia: Nachognero Valley, Schoenfeldt 3439. 
2. Sitanion pubiflorum J. G. Smith, U. 8. Dept. Agr. Div. Agrost. Bull. 18: 19. 
1899. 
Type locality, ‘‘Tucson, Ariz.,’’ the type specimen collected by Toumey (no. 795). 
Rance: Southwestern United States to southern Mexico. 
HERBARIUM SPECIMENS FROM Mexico: 
Hipa.a@o: Cerro Ventoso above Pachuca, Pringle 6944. Pachuca, sandy river 
bed, Hitchcock 6765. El Salto, hills, Pringle 9568. 
Puesta: Esperanza, rocky hill, Hitchcock 6482. 
130. ARUNDINARIA Michx. Fl. Bor. Amer. 1: 73. 1803. 
KEY TO SPECIES. 
Blades 2 mm. wide; lemmas 1 to 1.5 mm. wide.................... 1. A. acuminata. 
Blades 5 to 8 mm. wide; lemmas 2 mm. wide...................-- 2. A. longifolia. 
