HITCHCOCK——-MEXICAN GRASSES. 197 
4. IMPERATA Oyril. Pl. Rar. Icon. 2: 26, pl. 11. 1792. 
KEY TO THE SPECIES. 
Panicle 7 to 10 cm. long, rather loose; hairs about twice as long as 
spikelet .......--2--dseeee ee eee eee eee ee eee teers 1. I. brasiliensis. 
Panicle usually 20 to 25 cm. long, dense; hairs longer......-.---.- 2. I. hookeri. 
1. Imperata brasiliensis Trin. Mém. Acad. St. Pétersb. VI. Math. Phys. Nat. 
2: 331. 1833. 
Type locality in Brazil. 
Rance: Southern Mexico to Brazil. 
HERBARIUM SPECIMENS FROM MEXICO: 
Veracruz: Mirador, Liebmann 86. Sanborn, Orcutt 3075. 
2. Imperata hookeri Rupr.; Anderss. Ofv. Vet. Akad. Férh. 12; 160. 1855. 
Type locality ‘‘in Texas,” the type specimen collected by Drummond (ser. IT. 
no. 283). 
Range: Southwestern United States to Jalisco. 
HERBARIUM SPECIMENS FROM Mexico: 
Lower Cauirornia: Desert canyon in northern part of territory, Orcutt in 1884, 
Sonora: Hermosillo, bank of ditch, Hitchcock 3610; Brandegee 77. 
Jauisco: Rfo Blanco, Palmer 444 in 1886. 
5. ERIOCHRYSIS Beauv. Ess. Agrost. 8. pl. 4. f. 11. 1812. 
1. Eriochrysis cayennensis Beauv. Ess. Agrost. 8. pl. 4. f. 11. 1812. 
Type locality presumably Cayenne. (Beauvois spells the specific name ‘‘caya- 
nensis.’’) 
Range: Tropical America. 
HERBARIUM SPECIMENS FROM MEXICO: 
Oaxaca: Trapiche de la Concepcién, Liebmann 2. 
Curapas: Ocuilapa, Nelson 3063. 
6. ERIANTHUS Michx. FI. Bor. Amer. 1: 54. 1803. 
1. Erianthus trinii Hack. in DC. Monogr. Phan. 6: 135. 1889. 
Type locality in Brazil. 
Rance: Mexico to Brazil. 
HERBARIUM SPECIMENS FROM MEXICO: 
San Luis Potosi: Tamasopo Canyon, mountain side, Pringle 3135. 
Veracruz: Borrego near Orizaba, Bourgeau 2970. Orizaba, open rocky hill, 
Hitchcock 6379. Mirador, Liebmann 38. 
7. ISCHAEMUM L. Sp. Pl. 1049. 1753. 
1. Ischaemum latifolium (Spreng.) Kunth, Rév. Gram. 1: 168. 1829. 
Andropogon latifolius Spreng. Syst. Veg. 1: 286. 1825. 
Type locality, ‘‘Guadalupa, Martinica,’”” West Indies. 
Rance: Mexico and the West Indies to Brazil. 
HERBARIUM SPECIMENS FROM MEXICO: 
Veracruz: Under spray of a waterfall in the barranca of Texolo near Jalapa, 
Pringle 8106. Fortin, Kerber 296. Cérdoba, Bourgeau 2203. Mirador, 
Liebmann 9, 13. 
8. HEMARTHRIA BR. Br. Prodr. Fl. Nov. Holl. 207. 1810. 
1. Hemarthria fasciculata (Lam.) Kunth, Rév. Gram. 1: 453. 1829. 
Rottboellia fasciculata Lam. Tabl. Encycl. 1: 204. 1791. 
Type locality, ‘‘Barbaria.’”’ 
