Onicus. COMPOSITE. 401 



Gray, PI. Fendl. 110, not Nutt. Plains of S. Colorado, New Mexico, and Arizona; first 

 coll. by Fcndler, Wright, &c. 



C. OCCidentalis, GRAY, 1. c. Mostly stout, 2 to 5 feet high, very white with thick coating 

 of cottony wool: leaves from sinuate-dentate to piunatitid, not very prickly: involucral 

 bracts sometimes narrow and herbaceous-acerose from a little dilated base, sometimes with 

 broader more coriaceous base, or the outer with lanceolate-subulate tips : corollas red or 

 crimson (the longer inch and a half long) : style destitute of node. Carduus occidt Utah's, 

 Nutt. Trans. Am. Phil. Soc. vii. 418. Cirsium Coulteri, Gray, PI. Fendl. 110; Eaton in Bot. 

 King Exp. 195. S. Oregon and W. California to San Diego and the Mohave ; first coll. 

 by Coulter. Varies much in the size of the heads ; these in some plants only inch and a 

 half long, narrower, and involucre glabrate ; its outer bracts successively shorter, with 

 lanceolate-subulate squarrose green tips ; approaching C. Californicus and also the following 

 section. 



* * * * Bracts of the involucre regularly and chiefly appressed-imbricated in numerous ranks ; 

 the outer successively shorter, not herbaceous-tipped or appendaged, except that the innermost 

 (which are all muticous or innocuous) are in one or two species obviously scarious-tipped. 



-i Heads oblong or cylindraceous, showy (l to 2 inches long): flowers bright red or crimson- 

 pink: involucral bracts comparatively large, not at all glandular on the back; inner ones all 

 erect and purplish-tinged. Arizonian and Californian. 



H- White with cottony wool, which is tardily if at all deciduous, 1 to 3 feet high. 



C. Anderson!, GRAY, 1. c. Slender, rather lightly and loosely woolly : leaves lightly 

 prickly, sinuate-pinnatifid, rather sparse -. heads naked-pedunculate : involucral bracts com- 

 paratively loose and erect, all gradually attenuate from a narrow base ; outermost tipped 

 with a small weak prickle ; corolla bright pink-red ; its slender lobes about equalling the 

 throat: style considerably prolonged above the very obscure node. Dry hills, E. Califor- 

 nia, adjacent Nevada, and S. W. Idaho ; common along the Sierra south to the Yosemite and 

 Kern Co. ; first coll. by Anderson. 



C. -A.riz6ni.CUS, GRAY, 1. c. More densely white-woolly, branching and leafy : leaves 

 sinuate or piunatih'd ; lobes prickly -pointed; heads more numerous, less peduncled: invo- 

 lucral bracts well imbricated, soon glabrate; outer coriaceous, ovate-oblong to ovate-lanceo- 

 late, abruptly contracted into a rigid prickle of rarely over their own length, inner attenuate : 

 corolla crimson-purple or carmine ; its lobes twice the length of the throat : style produced 

 at tip to only 4 or 6 times its diameter above the manifest node. Cirsinm undidatum, var., 

 Gray, PL Wright, ii. 101. Sandy or gravelly places, Arizona and S. W. Utah; first coll. 

 by Wright and by Thurler. 



-H- -H- Green and glabrous or very early glabrate, 3 or 4 feet high. 



C. Rothrockii, GRAY. Stout, branching, leafy to the top : leaves from incisely pinnatifid 

 to piunately parted, conspicuously prickly : heads rather thicker than in the foregoing : 

 involucre similar, but longer prickly (prickles sometimes even three-fourths inch long) : 

 corolla and style similar, or node of the latter less evident. Proc. Am. A cad. xvii. 220 

 (form noted l/y Rothrock in Wheeler Rep. under C. Arlzonicus). Canons of S. Arizona, 

 Rothrock, Lemmon. 



-I -1 Heads broad, mostly large : flowers from rose-purple to white : involucre glabrous or early 

 glabrate, the light arachnoid wool caducous; its bracts rather large, chartaceous or coriaceous, 

 not at all glandular on the back, outer tipped with a short weak prickle or innocuous cusp, 

 innermost wholly unarmed and not rarely scarious-tipped. 



w- Eastern species: leaves equally green both sides: anther-tips broadish. 



C. pumilus, TORR. Somewhat villous-pubescent: stem stout, mostly simple, a foot or two 

 high (rarely taller) and bearing 1 to 3 large heads: leaves oblong or lanceolate, commonly 

 pinnatifid, copiously prickly and setose-ciliate : heads full 2 inches high, often leafy-bracteose 

 at base, arachnoid when young: involucral bracts mostly lanceolate : corollas rose-purple, 

 occasionally white, with lobes shorter than throat : flowers distinctly fragrant. Compend. 

 282; Bigel. Fl. Bost. ed. 2, 292; Gray, Proc. Am. Acad. x. 40; Sprague, Wild Flowers, 138, 

 t. 32. Carduus odoratus, Muhl. Cat. 70; Darlingt. Fl. Cest. ed. 1, 85. C. jmmthts, & var. 

 hystrix, Nutt. Gen. ii. 130. Cirshtm pumiliun, Spreng. Syst. iii. 375 ; DC. Prodr. vi. 651 , 

 Torr. & Gray, 1. c. Open ground, Mass., near the coast, to Penn. and New Jersey. 



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