122 PROCEEDINGS OF THE AMERICAN ACADEMY 



the town of Orizaba, 4,000 ft., August (no. 290). Equals no. 1552 

 of Wright's Cubau Coll., arid Pringle's nos. 2615 and 3133. Not 

 A. Brasiliensis, Raddi, as figured by Trinius (Icon. 266). Hemsley 

 (Biol. Cent. Amer. Bot., 111. 252) unites A. aleutica, Rupr., aud 

 A. latifolia and A. scoparia, Fourn., with A. Deppeana, Nees. 



Oryzopsis pubiflora (Trin.), Scribner. (Ex descrip. Urachne 

 pubi flora, Trin. & Rupr. Stipac. 21; Nasella pubiflora, Desv. Flor. 

 Chil. 264.) Culms slender, 2 feet high, with an open few-flowered 

 panicle: spikelets 2-2J lines long; empty glumes lanceolate, sub- 

 equal, 3-nerved, with abruptly acuminate hyaline tips ; flowering 

 glume, including the short conical and curved callus, 1^ lines long, 

 obliquely truncate at the broad apex, and pilose all over with ap- 

 pressed hairs : hairs on the callus short and dense : awn about 6 lines 

 long, twice geniculate, minutely ciliate below, scabrous above, readily 

 falling off": anthers bearded at apex. — Hills near Esperanza, 8,000 

 ft., August (no. 319). Equals no. 2018 of Bang's 1891 collection. 



Muhlenbergia Seatoni, Scribner, n. sp. Panicle diffuse, the 

 upper branches widely spreading; flowering glume four times as long 

 as the obtuse empty glumes, bifid at apex, the divisions setiform ; awn 

 about three times the length of the flowering glume. 



Perennial: culms smooth, slender, branching near the base, 8-12 

 inches high (including the panicle) : leaves linear-filiform, 2-3 inches 

 long; ligule prominent, hyaline : panicle nearly one half the length of 

 the culm, the lower branches ascending, partly included in the upper 

 leaf-sheath; pedicels long and capillary, much exceeding the spike- 

 lets: spikelets about 2 lines long; empty glumes small (\ line), 

 rounded, obtuse, the second a little longer and broader than the first : 

 callus conspicuous, hairy on the anterior side : palea broad, nearly 

 equalling its glume in length : awn about 6 lines long. — Hills near 

 Esperanza, 8,000 ft., August (no. 320). It is allied to M. capillaris, 

 Trin., but quite distinct. 



Agrostis verticillata, Vill. Delf. 74; Trin. Unif. 195; Trin. 

 Icon. 36. Kunth (Enum. PI. I. 219) refers this to A. stolonifera, L., 

 but there is some confusion in regard to the Linnrean plant. Munro, 

 in his " Catalogue of the Grasses in the Herbarium of Linnasus," says, 

 under A. stolonifera, that " the Herbarium contains one of the forms 

 of A. vulgaris which is called stolonifera, the Florin grass ; another 

 marked stolonifera by Linnaeus is A. verticillata, Vill." — Mt. Ori- 

 zaba, 10,000 ft., August (no. 192). 



Ca lam agrostis Schiedeana, Steud. Gram. 193. (Ex descrip. 

 Deyeuxia Schiedeana, Rupr. ex Fourn. Mex. PI. Enum., Gram. 105.) 



