Cakus. COMPOSITE. 401 



Grar, PI. Fendl. 110, not Xatt. — Plains of S. Colorado, Xew Mexico, and Arizona; first 

 coll. by Fendler, Wright, &c. 

 .C. Occidentalis, Geat, 1. c. Jlostly stout, 2 to 5 feet high, very white with thick coating 

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

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

 Xutt. Trans. Am Phil. Soc. vii. 418. Cirsium Coulteri, Gray, PL Wright, ii. UO; Eaton 

 in Bot. King Exp. IB.J. — fi. Oregon and \V. California to San Diego and to 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 sliorter, 

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

 following section. 



# # * * Bracts of the involncre re^larly and chiefly appresscd-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. 



-)— Heads oblong or cylindraceous, showy (IJ 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 purpli-h-tinged. Arizonian and Californian. 



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



C AncLersoni, Grav, l. c. Slender, rather lightly and loosely woolly; leaves lightly 

 prickly, sinuate-piunatifid, rather sparse: heaJs naked-pedunculate: involucral bracts com- 

 paratively loose and erect, ail gradually attenuate from a narrow base ; outermost ripped 

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

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

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

 Kern Co. ; first coU. by Anderson. 



C. ArizonictlS, Geat, 1. c. Jlore densely white-woolly, branching and leafy: leaves 

 sinuate or piunatifid; lobes prickly-pointed; heads more numerous, less pednncled; invo- 

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

 late, abruptly contracted into a rigid priclde 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. — drsium undulatum, var.. 

 Gray, PI. 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, Geat. Stout, branching, leafy to the top : leaves from incisely piunatifid 

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

 involucre similar, but longer prickly (prickles sometimes even three-fourths incb 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. Arhonicus}. — Canons of S. Arizona, 

 Rothrock, Lemmon. 



^- -i- 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. 



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

 »C. pumilus, ToEE. 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 

 piunatifid, 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. Best. 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, 8.5. C. pvmilus, & var. 

 husirix, Xutt. Gen. ii. 130. Cirsium pumilnm, 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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