Cnicus. COM POSI TyE. 419 



Var, ochrocentrus, Gray. Leaves deeply pinnatifid and exceedingly armed 

 with slender yellowish prickles: scales of the involucre broader and flatter, destitute 

 of glutinous spot or ridge, and armed with a long and rigid prickle. — Cirsixim 

 ochrocentrum, Gray, PI. Fendl. 110. 



Open grounds, from tlie upper Mississippi and from Texas to the coast of Oregon, from wliicli 

 the ordinary form probably extends into the northern i)art of California. Var. ochrocaUrus, a 

 mostly southern variety nflecting arid districts, generally very distinct in character, reaches the 

 Hiorra Ncwadii at Silver Mountain, wlioro it was collected by Prof. Jimvcr. 



•k- 4- Involucre narrower, hemming cam paunlate or ci/llnt/rareoiin ; tin nca lea fewer and 

 less closely imbricated, thinner and chartac.eons, (/raduall// longer, more tapering 

 into the j^rickle or prickly point : floivers carmine or purple-red : antlier-tips merely 

 acute. 



5. C. Arizonicus, Gray, 1. c. White-woolly, leafy to the top, 2 to 4 feet high, 

 branching and bearing several short-peduncled or sessile heads : leaves lanceolate, 

 pectinately toothed or ])innatilid, slender-s])iny : outer scales of the involucre ovate- 

 oblong, the next lanceolate and rather abruptly narroweil into a prickly-tipped 

 acumination : lobes of the corolla fully twice the length of the throat : stigmatic tip 

 of the style short. 



Common in Arizona and S. Utah ; most likely inhabiting the southeastern borders of our Sbite. 

 Heads 1^ to 2 inches long, apparently oblong or cylindra(;eous before exiiansion, the involucre 

 becoming campanulate. "Flowers bright carmine" or "bright red-purple." Filaments spar- 

 ingly hairy or sometimes almost glabrous. Anther- tips remarkably blunt. Stigmatic summit 

 of the style only half a line or in age a line long alwve the manifest node, much shorter than in 

 any other of our indigenous North American species. 



6. C. Andersonii, Gray, 1. c. Blonder, 2 or 3 f(^ot high, sparsely ](>uved, the 

 white wool ratiicr cobwebby and deciduous: leaves mostly pinnatilid and moder- 

 ately prickly-toothed : heads nakod-peduncled : scales of the campanulate involucre 

 less unequal and in fewer series than in any of the foregoing, somewhat loo.se ; tho 

 outer rather narrowly lanceolate and the succeeding more subulate, gradually taper- 

 ing into a short prickly point ; the innermost very long and slender : lobes of the 

 corolla not longer than the throat. 



Sierra Nevada, from Tulare Co. to Carson City and Donner Lake, Ander.ion, Torrcy, Bo- 

 Inndcr. Head 2 inches long. Flowers crimson-red. Tips of the appendnges of the anthers trian 

 gular, either acute or acutish. Stigmatic tip to the stylo filiform and moderately elongated ; 

 node obsolete. 



§ 2. Scales of the involucre of almost equal or moderately vnrqnal length, nil hut the 

 innermost tapering gradually into a long marginless and mostly greenish and 

 spreading or ascending usually spiny-tipped acumination. 



* Heads large (mostly 2 inches high) : flotvers crimson : involucre densely long-icnolly 

 when young ; the scales tapering gradually from a. short coriaceous oppressed ba.ie 

 into long and slender but rigid spreading spinescent tips. 



7. C. OCCidentalis, Gray, 1. c. Very wliito witli long and dense won), 2 to T) 

 ftiet high, stout : leaves lanceolate and tho lowest oblong, siiuiato-piiuiatiliil or the 

 upper merely toothed, rather weak-prickly, the upper surface often bocoming naked 

 with age: involucre globose; its scales with very long and slender rigid mostly 

 subulate or almost needle-shaped and merely prickly-pointed tips, the lowermost 

 nsually widely spreading : corollas bright crim.son or purple-red, regularly deleft ; 

 the lobes one and a half to twice the length of the throat : tips of the anther-append- 

 ages triangular-acuminate. — Cardans orridenfalis, Nutt. I.e., with orronenua char- 

 acter. Cirsivm Cov/teri, (\ ray, J'l. "Wright, ii. 110; J'latou in Mot. King I'Ap. 11)5. 



Open grounds, not rnre apparently throughout the State, and witliin the iKirders of Nevada. 

 A striking species, with its white cottony wool, and inigo and brond licids of biiglit red flowci-s. 

 Heads 2 inches high, or sometimes considerably less. Sciijcs of the invobn-ie an inch and a lialf 

 or less in length, mostly letaining the dense and long cobweblty wodl. I'Mnwrrs mi incli and a 



