98 



resembling; the bractletsj but smaller, muGh shorter than the long 

 styles. 



Mostly ill iiiarshos; tluoughout Calilornhi {O'recne, Lctumon 108, (,'. /i". 

 \'aneif 223 and distributed as var. armalum. Cleveland, etc.) 



The species varies greatly in size, and in drier places it passes into the 

 dwarfed 



\'ar. minimum, which is but 1 to 8 inches high, with all 

 parts correspond! ngl\- reduced, and bracts about as long as the 

 heads. 



Donner Lake ( C. F. Sonne). 



12. E. discolor Watson, Proc. Am. Acad, xviii. 193. Stem 

 erect, slender, 1 to 2 feet high, bearing a single head (rarely 

 more): radical leaves on veiv long petioles, oblong to narrowly 

 oblanceolate, thin, slightly crenate; stem leaves few, sessile, linear- 

 lanceolate, acutely or spinosely-toothed : head ovate-oblong (about 

 f> lines long), with involucre of numerous linear-lanceolate spinose- 

 tipped bracts (white within and green without) longer than the 

 heads and entire or sparingly spinose-toothed ; bractlets narrow, 

 with a long spinose acumination: fruit with ovate abruptly cuspi- 

 date-tipped calyx-lobes and long slender styles. 



Growing in water, at Cienega, Huachuca Mts., S. Arizona {Lenunon, in 

 1882); also in S. W. Chihuahua, Mexico {Pahner :>i)7). Fl. August to 

 November. 



* * * * Simple to diffuse : leaves coriaceous., lohed or farted., 

 spinosely tipped : soiitherti (except the first two species). 



13. E. articulatum Hook. Lond. Journ. Bot. vi. 232. Erect, 

 a foot or so high (rarely prostate), more or less branching through- 

 out: radical and lower stem leaves reduced to very long (some- 

 times a foot long) jointed petioles with or without a small lanceo- 

 late blade (from entire to laciniately toothed) ; upper stem leaves 

 sessile: involucre (^f linear cuspidate-tipped and spiny-toothed 

 bracts ( about 6 lines long) much longer than the heads; bractlets 

 tricuspidatc, the middle one much the largest, scarcely longer than 

 the flowers: fruit with lanceolate cuspidate-acuminate calyx-lobes 

 hardly longer than the styles. — E. petiolatum var, Jtincifolium 

 Gray, Proc. Am. Acad. viii. 385. 



Swamps and wet meadows, California, San Simeon {M. K. Curruii), 

 Plumas county (.V/.s. /»'. .v. Austin); Oregon (Xnllitll, Hall 200, Howell, 



