Onicus. COMPOSITE. 401 



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

 coll. by Fendler, Wright, &c. 

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

 of cottony wool : leaves from sinuate-dentate to pinnatifid, 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 occidentalis, 

 Nutt. Trans. Am. Phil. Soc. vii. 418. Cirsium Coulteri, Gray, PL 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 rank9 ; 

 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. 



-1— Heads oblong or cylindraceous, showy (1J 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. 



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



C. Andersoni, 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 ripped 

 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. ArizonicUS, Gray, 1. c. More densely white-woolly, branching and leafy: leaves 

 sinnate or pinnatifid ; 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. — Cirsium undulatum, var., 

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

 by Wright and by Thurber. 



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



C. Rothrockii, Gray. Stout, branching, leafy to the top : leaves from incisely pinnatifia 

 to pinnately 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. Acad. xvii. 220 

 (form noted by Rothrock in Wheeler Rep. under C. Arlzonicus). — Canons of S. Arizona, 

 Rothrock, Lemmon. 



+- 4- 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 * short weak prickle or innocuous cusp, 

 innermost wholly unarmed and not rarely scarious-tipped. 



++ 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. El. 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. pumilus, & var. 

 hystrix, Nutt. Gen. ii. 130. Cirsium pumitum, 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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