97 



giiied petiole; stciii-lcavcs iiarrovvor and sessile: heads pediincled' 

 globose (about () lines in diaiietei), with involucre of triangulai- 

 lanceolate (broader at base) entire rigid tliick-niargined bracts 

 ( soiiietiines an inch long) nuich longer than the head ; bractlets 

 the same and full}- as jironiinent: fruit with lanceolate acuminate 

 calyx-lobes longer than the short styles. H. pctiolatitm var. 

 arniatinn Watson, Hot. Calif, i. 255. 



Californlii, from San Die^'o {Ormll). Kan Luis Obispo {Pahiur I.").'), in 

 l)!irLi, tlu'ough tlie central part of tlie state uuiniorous collectors) to Hum- 

 boldt (Ki'loiiu A- Harford 1142) and Butte counties iJ/c.s. Ji. M. Au>ili,i). 



Distributed by Oreutt, Pringle, and Mrs. .\ustin as K- peliofufuni. 

 Hook., from wliieli it differs in its diffuse branching habit, short petioled 

 radical loaves, broad eiitiie rigid bracts and bractlets, all similar and con- 

 spicuously longer than the head, and short styles. 



10. E. Vaseyi C. A: K. Hot. Gazette, xiii. 142. Stems a 

 foot or less high (sometimes reduced to 2 or 3 inches), several 

 from a common root and branching above: leaves oblanceolate, 

 unequally spinulose-serrate, attenuate below: involucre of narrow 

 thick and rigid spinose and spiny-toothed bracts (sometimes an 

 inch long) much longer than the head; bractlets the sair.e: fiuit 

 uith lanceolate acimiiiiatc-cuspidate calyx-lobes longer than the 

 short styles. 



In wet ground. California, San Antonio Kiver, July. ISSO (/.'. J\. Vaxtif 

 •>22, d'isUihutod as K, ficlioUiluiii), near Chico, Butte rouniy i.Mr><. 1{. M. 

 Austin), near Merced. Merced county {RcdJieUl 2477). near Mt. ShasUi 

 ( F. H. Miller, ill 188(i); S. W. Oregon, near Medford {Ifowrll. a much re- 

 duced form), also by the Wilkes" Expedition. 



This spex^-ies is remarkable for its iiairow very spiny bracts and bract- 

 lets (often blue), much more rigid than in hj. (irnialitni, and spiny toothed. 

 The calyx-lobes also have str()ng(>r cuspidate tips than in that species. 



11. E. petiolatum Ib-uk. Fl. r,.M-.-Ain. i. 2r)i». i:rect, l 

 to 5 feet high, l)ranching abox c ( oi' fiom the base in low forms): 

 radical leaves oblanceolate, spinosely and unequally serrate, attenu- 

 ate in an elongated fistulous petiole (submerged leaves only of the 

 terete jointed petiole); stem ka\cs mostly sessile: heads peduncled, 

 globose (C lines in diameter ), with involucre of linear-lanceolate 

 spinosoly-tipped and toothed bracts (sometimes an inch long) longer 

 than the head : bractlets lanceolate, cuspidate-tipped, but little longer 

 than the flowers, scarious-winacd bi-luw : fruit with lahx-lobcs 



