OF ARTS AND SCIENCES. 267 



1 to li lines long: akene scabrous above, very acute at base. — Cali- 

 fornia to New Mexico. Variable ; inflorescence in subalpiue specimens 

 at times reduced to a very few nearly capitate involucres. 



82. E. SAXATiLE. Biennial or perennial (?), sparingly branched 

 and very leafy at base, rather stout, a foot high or less : leaves rounded 

 or obovate, obtuse, 6 to 8 lines broad or less, cuneate at base upon a 

 short thick petiole, densely tomentose both sides : branches of the 

 cymose panicle short and somewhat spreading : bracts larger, subfolia- 

 ceous, triangular to acute-oblong: involucres and flowers 1^ to 2 lines 

 long: sepals apj^ressed to the nearly glabrous akene, which is more 

 abruptly narrowed at base. — On rocks above San Bernardino (Dr. 

 C. C. Parry, 1876), and in the Santa Lucia Mountains, Dr. E. Palmer. 



83. E. STRICTUM, Benth. Very slender, glabrate above : branches 

 of caudex very short : leaves small, ovate to oblanceolate, on long 

 slender petioles : panicle twice or thrice divided, with 1 to 3 involucres 

 on the short branches : bracts short, the lower somewhat elongated : 

 flowers and glabrate involucres 1^ lines long. — Blue Mountains, 

 Oregon. 



84. E. RACEMOSUM, Nutt. Sparingly or not at all branched at 

 base, stout, 1 to 3 feet high: leaves large (1 to 2|- inches long), ovate 

 or oblong, on long petioles : lower bracts somewhat foliaceous : invo- 

 lucres approximate upon the few strict branches of the once or twice 

 forked panicle : flowers 2 lines long. — Utah to New Mexico. 



85. E. ELONGATUM, Benth. Sparingly branched at base, a foot or 

 two high : leaves usually scattered, smaller, lanceolate to ovate, on 

 short petioles : bracts rarely elongated : involucres 2^ to 3 lines long, 

 obtusely toothed, distant on the few elongated branches of the panicle. 

 — S. California, near the coast. 



++ -w- Perennials, woody and leafy below : panicle diffuse with short and rigid 

 branclilets : involucres short, with rounded and more or less membranously 

 margined teeth ; bracts very small. 



86. E. Heermanni ; Dur. & Hilg. A foot high, soon glabrate above, 

 divaricately dichotomous, the branclilets somewhat spinescent : leaves 

 oblanceolate, ^ inch long, on slender petioles : involucres few and dis- 

 tant, campanulate, a line long : flowers rose-colored or yellowish, 1 J 

 lines long. — S. California, Nevada. 



87. E. Palmeri. More tomentose throughout, and usually taller : 

 leaves oblanceolate, ^ inch long, on short petioles : branches somewhat 

 flexuous, mostly alternately divided, the short branclilets divaricate or 

 deflexed, very short-jointed : involucres rather numerous, narrowly tur- 

 binate, a line long, nearly glabrous : flowers a line long, reddish white; 



