104 



Panicle |-i inch long, simple or shortly branched below, empty 



glumes ^, nearly i line long, ovate-acute or lanceolate-accurai- 



minate and mucronate or shortly awn-pointed ; floret linear with a 



distinct, hairy callus, i^ line long, terminating in a slender awn, 1-3 



lines long ; palea acute, equalling its glume ; grain linear, nearly aline 

 long 



Rocky canons, Santa Catalina Mts., alt. 5,000 feet. May. 

 The general appearance of this grass, and especially the charac- 

 ter of the spikelets is so like that oi M 



■gia tnat it is re- 



ferred to Sporobolus depauperatus with considerable doubt. The 

 culm is nearly 3 feet long, very firm and hard below, very much 

 branched above, forming a long mass of slender branches with fili- 

 form, divergent, thread-like leaves. 



This is probably the same form as that collected at Tejon Pass 

 by Mr. Blake, which Dr. Thurber (Bot. Cal., ii., p. 268) describes as 

 "a tangled mass of long, flexuose, filiform and very tough culms." Dr. 

 Thurber adds that this appears to be the form assumed by the plant 

 in the southern localities, where it is much sought after by the Mex- 

 icans, who use it for stuffing their large leathern aparejos, or pack- 

 saddles, a purpose to which its toughness and elasticity especially 

 adapt it. It was this use of it which led Dr. Torrey to give the 

 name V. utilis. 



Pringle's specimens agree in habit with those of Lindheimer's 

 Texan collection (1846), but the spikelets are different, having, as 

 stated above, the characters of a Muhlenbergia (calling to mind 

 those of M. sylvaticd) ; yet, there is so much variation in the minute 

 characters of those in the same panicle that it suggests an abnormal 

 development. It is unlike any Muhlenbergia before observed, and 

 IS referred to Dr. Torrey's Vilfa utilis because of its resemblance in 

 habit to descriptions of that grass, and to Lindheimer's specimens. 



40. Sporobolus ramulosus,lLW-\., En. PL, i., 215; Thurber, Bot. 

 Cal., II., p. 2Q(); Vilfa ramulosa, HBK., Nov. Gen., i. 137, t. 684; Wat- 

 son, Bot. King's Exped., p. 376 ; Agrostis minutissima, Steud., Syn. 

 Gram., 171. 



By streams, Santa Catalina Mts. May. 



41. Agrostis arachnoides, Ell., Bot. Carol., 134 ; Chapman, Flor. 

 S. States, p. 551. 



Near Camp Lowell, Arizona. 



42. * Agrostis exarata, Trin. Watson, Bot, King's ExDed D 

 377 ; Thurber, Bot. Cal., ii., p. 273. F ■» F- 



There are two forms ; No. 466, from the banks of the Rillita, 

 May, and No. 468, with a more slender panicle, gathered by brooks 

 of the Santa Rita Mts. in July. ' 



__ 43- Agrostis varians, Trin., Agrost., ii., 68 ; Thurber, Bot. Cal., 

 11., p. 273. 



Mountains about the head-waters of the Sacramento River ; alt. 

 8,OGo feet. August. 



44. * Agrostis vertici/lata, Vill., Delph., ii., 74 ; Trin., Icon., t. z^; 

 Thurber, in Bot. Cal., 11., p. 272. > ^ ' 



Banks of the Santa Cruz, near Tucson May 



n fi't^.*TrT''S't''^^f^--'^-' ^P-' '■' 370; Grly, Man., sth ed., 

 p. 611 ; Thurber, Bot. Cal., 11., p. 274. 



