148 Piper New nu<l liitrirstin.g American Grasses. 



Bromus marginatus maritimus subsp. nov. 



Culms coarse, 60 to 90 cm.; leaf-blades glabrous, 5 to 10 cm. broad ; panicle 

 narrow, compact, 10 to 15 cm. long, the spikelets densely crowded. 



A characteristic subspecies from the sea coast of California. The scanty 

 herbarium material has heretofore been considered as abnormal, but a 

 splendid series of specimens collected by Mr. J. B. Davy shows that its 

 peculiarly dense panicle is a constant character. 



The following specimens have been examined, all from California: Point 

 Reyes, Davy 6798 (Type) : 6744 : 6760 ; Monterey, Davy 7281 ; Ocean 

 Beach, Lemmon ; San Francisco County, Michener and Bioletti, June 22, 

 181)2; without locality, Lemmon 383, in 1882; Ocean Bluffs near San 

 Francisco, Piper 6824. 



Bromus tectorum nudus Klett and Richter. 

 Bromus tectorum nudus, K. and R. Fl. Leipzig 109, 1830. 



This variety is distinguished from true Bromus tectorum L. by having 

 smooth or merely scabrous flowering glumes. It has become established 

 in several western states as indicated by the following specimens: Uinta 

 County, Wyoming, A. Nelson 7215; Klamath County, Oregon, Cusick 2844; 

 Columbia Falls, Montana, Blankenship 36. 



Hordeutn comosum Presl. 

 Hordeum comosum Presl. Rel. Haenk. 1 :327, 1830. 



The following specimens seem referable to this Chilean grass: Alma, 

 Wash., Elmer 535, June, 1897; Colville Reservation, Wash;, Griffiths and 

 Cotton 363, June, 1902. The latter specimen is an excellent match for the 

 specimen in Philippi's herbarium of Chilean grasses. The species is very 

 close to //. caespitosum Scribn., differing only in having pubescent sheaths 

 and blades. 



Agropyron griffithsi Scribn. & Smith in herb. 



A pale, loosely tufted grass, 30 to 80 cm. high, having stout and elongate 

 reeping rootstocks. Culms 2-jointed, cylindric, slightly striate, glabrous. 

 Sheaths striate, glabrous or glaucous or puberulent; ligule obsolete or 

 nearly so ; blades rather rigid, strongly striate, mostly involute, smooth 

 beneath, scabrous above, 5 to 12 cm. long. Spike erect, 8 to 15 cm. long, 

 rather close ; joints of the rachis flattened, very scabrous on the angles, 

 usually about half as long as the spikelets. Spikelets pale, oblong, subterete 

 appressed, usually half-overlapping, closely 5 to 7 flowered ; joints of the 

 rachilla clavate, scabrous on the angles, 1 to 1.5 mm. long. Lower glume 

 linear-lanceolate, 3-nerved, 8 mm. long, tipped with an awn 3 mm. long, 

 scabrous on the nerves ; upper very similar, but broader and 4 to5-nerved. 

 Flowering glume oblong, firm, somewhat flattened on the back, smooth and 

 nerveless below, 5-nerved and scabrous apically, 8 to 10 mm. long, tipped 



