OF ARTS AND SCIENCES. 41 



parum soarioso-appendiciilatis ; corollaj hinc profundius fissoe lobis 

 fauci a^quilongis unico longiore. — Hills at Oakland and elsewhere near 

 Saa Francisco, California, Bolauder, Kellogg. Variable as C. Drurn- 

 mondii is, I am unwilling to include in it the plant here described. 



* * Folia laxe araneosa demum denudata : appendices antherarum 

 acutatae : caules elati saepius ultra-orgyales, ramis laxis gracilibus : 

 capitula pedunculata nuda : involucri subglobosi squamas arete inibri- 

 catoe, muticse vel mucronatae, plerceque dorso versus apieem carinato- 

 incrassato viscidae. 



••— Folia nunquam decurrentia, matura prteter tomentum tenue mox 

 deciduum \A. m. pilosa. 



C. MUTicus Pursh. Cirsium mutlcum Michx. ; Torr. & Gray, FI. 

 cum syn. Involucrum primum arachnoideum, squamis muticis vel 

 mucrouulatis. — Xewfoundland and Saskatchawau to Florida and 

 Louisiana. 



C. NuTTALLir. Cnicus glaber Ell., vix Carduus (Cnicus) glaher 

 Nutt. Gen. Cirsium Nuttallii DC. Prodr. G, p. 651 ; Chapm. FL 

 p. 247. Gracilis ; capitulis quam praecedentis minoribus ; involucre 

 haud araclinoideo, squamis angustioribus, exterioribus spiuula parva 

 setacea demum patente superatis. — South Carolina to Florida. Nut- 

 tail's New Jersey plant is without much doubt C. muticus, and he was 

 probably unacquainted with the present species, — for which, however, 

 it is not worth while to coin a new specific name. 



H — I— Folia in caulem pi. m. decurrentia, praeter tomeutum araneosum 

 laxum tardius deciduum glabra. 



C. Wrightii. Cirsium Wrightii Gray, PI. Wright. 2, p. 101. — 

 Western Texas and New Mexico, C. Wright. 



* * * Folia subtus vel utrinque tomento denso albo-lanata : appen- 

 dices antherarum acutatae vel cuspidatte : involucri subglobosi 

 squama} crebrae arete imbricatte, rigid;e, pleraeque spinula saepius 

 tenui demum patente superatte, dorso versus apieem nervo sen lin- 

 eola carinali incrassata saepe viscidula notatse. 



-t- Discolores (nempe foliis supra viridibus), orien tales, floribus roseo- 

 purpureis (raro albis). 



++ Pedalis ad tripedalem ; capitulis parvulis ; spinulis involucri brevis- 

 simis debilibus. 



C. ViRGiNiANUS Pursh. Carduus Virginianus Linn. — Yiro-inia 

 and Kentucky to Texas. 



VOL. X. (2d S. II.) 



