50 



763- — Carex densa. 



C, Brongiiiartii, Boott, t. 402 (1862). 



C. paniciLlata, W. Boott, Bot. Cal. ii. 232 (1880), v. s. Hb. 



Gray. 

 C. Brojigniartiif van dejisa, Bailey, Proc. Amen Acad, Arts 



and Sci. xxii. 137 (i886). 



Head very dense, ovoid or nearly globose in general outline, 

 dull dark brown; lowest bract often conspicuous, setaceous, an 

 inch or so long; perigynium broad-lanceolate, twice longer than 

 in the last species, thick, very strongly nerved on both sides, 

 wingless or slightly rough-margined above, produced into a long, 

 cylindrical cleft beak ; scales muticous or short-acute. California : 



Palmer^ Bigelow, Brezver, Kellogg diwd Harford 1067. 



C. XalaJ?enstSj Kunth, referred here in my Synopsis, is C 

 Muhlenbergii^ Schk. van ejiervis, Boott (v. s. Hb. BeroL). 



C. glovieratay Thunb., a South African species, is separated 



■ ■ 



from both C, densa and C. viearia by several characters, chiefly 

 by the broader and flatter perigynium which is less nerved, con- 

 spicuously margined, laciniate on the edges above, and shining at 

 maturity. 



^ 64. — Carex alma. 



Allied to C. tnilpt7ioidea, ^M.\c\\ic, and C. viearia^ Bailey: 

 Culm short and stiff (a foot to foot and a half high), sharply 

 angled, roughish, often curved; leaves very stiff, canaliculate, 

 rather broad, longer than the culm, glaucous; spikes mostly com- 

 pound, very numerous and composing a head three to four 

 inches long, . the lower ones sometimes remote, but mostly 

 densely aggregated, dull brown ; bracts broad, with thin wdiite 

 margins, produced into an awn w^hich does not equal the spike; 

 perigynium ovate, small and thin, margined, nerveless or nearly 

 so, very rough on the margins above, the beak bifid ; scales 

 broadly ovate, prominently white- margined, acute {242a), San 



Bernardino Co., California, Parry and Lcmmon 396 (Hb. Bailey., 



and Hb. Phila. Acad. Sci.), In aspect much like C. leiorhyncJia, 



Meyer, but distinguished at once by the absence of the setaceous 



bracts and by the rough-angled perigyniurii- It is probable that 



all the plants referred to C. leiorhyneha in this country belong 



to this species. 



