COMPOSITE. 381 



appressed, acutisb or mucronate, the tips green: rays white; disk- 

 corolhis becoming red: achenes minutely pubescent; pappus rather 

 rigid.— Borders of woods and thickets; early-fiowering. July— Sept. 



2. A. Torreyi, Porter, Bull. Torr. Club. xvii. 37, t. 100. Near the 

 preceding, but taller, not as stout, less pubescent; stems clustered, the 

 rootstocks freely branching: leaves spatulate-lanceolate, acute, serrate, 

 2—3 in. long: heads numerous, smaller than iu the last: involucral 

 bracts oblong- to spatulate-linear, slightly woolly - ciliate, the green 

 appressed tips acutish: rays few, pinkish.— At Blue Canon, and in Sum- 

 mit Valley, Torrey, Greene; referred by Dr. Gray to the preceding, but 

 apparently a fair species or subspecies. Aug. — Oct. 



* * Perennials, steins less leafy, often decumbenl; inflorescence more panic- 

 ulate or racemose. 



» 



3. A. Meiiziesii, Lindl.; Hook. FL ii. 12(1834). Strictly erect, 2 ft. 

 high, usually simple and very leafy up to the mostly simply racemose or 

 racemose - paniculate inflorescence, the whole plant cinereously and 

 roughly pubescent: leaves oblong-lanceolate, acute, 1 — 3 in. long, re- 

 motely serrate or entire, sessile by a broad auriculate-claspiug base: 

 involucre broadly turbinate, I4 in. high; bracts somewhat spatulate, 

 well imbricated, the broad green tips obtuse: rays light violet, rather 

 short.— Vaca Mountains, Jepson, and southward. Sept. — Dec. 



4. A. iuvenustiis, Greene, Man. 179 (1894). Stout stems 2 ft. long or 

 more, ascending from a decumbent base; herbage cinereous with sca- 

 broiis and short-hirsute pubescence: lower cauliue leaves lanceolate- 

 spatulate, 2—3 iu. long, with remote and slight serratures: heads very 

 numerous in an ample cymose panicle; involucres nearly hemispherical, 

 I4 in. high, the almost wholly green-herbaceous very obtuse spatulate- 

 linear bracts in rather few ranks; rays dull pale purplish.— Napa Co., to 

 Amador, and southward. Aug., Sept. 



5. A. Chileiisis, Nees, Ast. 123 (1832): A. Chamissonis, Gray; Torr. 

 Bot. Wilkes Exp. 341 (1874). Erect, stoutish, 2—4 ft. high, glabrous or 

 somewhat hirsute, the stem occasionally with strongly hirsute lines : leaves 

 lanceolate, acute, entire, 2—5 in. long, entire, or obscurely serrate, the 

 whole margin scabrous: heads % in. high, in a more or less ample 

 panicle of short loose leafy racemes; bracts of campanulate or broadly 

 obconic involucre much imbricated, linear or liuear-spatulate, with short 

 and rounded green tips: rays 25—30, purple or violet, % in. long. — 

 Toward the seaboard only; common and variable; some forms very 

 showy. Aug.— Oct. 



