OF ARTS AND SCIENCES. 47 



■•— -1— Involucri squamjE tenuiores laxiores, fere innocuse : caiiles 3-8- 

 pedales : capitula nuda. 



C. EDULis. Laxe tenuiter araneosus, mox glabrescens viridis ; 

 caule folioso ; foliis saepius sinuato-pinnatifidis membranaceis ; capitulis 

 subpaniculatis vel subglomeratis ; involucro arachnoideo ; corollis pur- 

 pureis (quandoque pallidis ? ) gracilibus subincequaliter 5-fidis, lobis 

 demum filiformibiis iiicrassato-apiculatis. Cirsium edide Nutt. 1. c. — 

 From British Columbia southward along the coast of California to the 

 Bay of San Francisco. Filaments sometimes hairy, as described by 

 Kuttall, very commonly glabrous : perhaps a subsexual difference. 

 Dwarf specimens collected by Lyall in the northern Cascade Moun- 

 tains have the leaves pinnately parted into narrow divisions. 



C. REiiOTiFOLius. Caule sa3pius parce foliato ; capitulis subpani- 

 culatis ; foliis subtus arancoso-dealbatis raro denudatis pinnatipartitis, 

 lobis angustis ; involucro tenuiter arachnoideo glabrescente, squamis 

 lineari-attenuatis ; corollis ochroleucis inoequaliter 5-fidis, lobis 3 vel 4 

 altius coalitis. Carduns remotifolius Hook. 1. c. Cirsium remotifolium 

 DC. C. stenolepidum Nutt. 1. c. — Oregon near the coast to Humboldt 

 Co., California. 



§ 3. Involucrum subglobosum gradatim imbricatum, squamis plerisque 

 scarioso- vel fimbriato-appendiculatis : flores albidi vel flaviduli. 

 {^Echenais Cass., DC.) 



C. Parryi. Yiridis, vix araneosus ; capitulis subracemosis parum 

 nutantibus ; foliis lanceolatis sinuato-dentatis ; involucro laxius imbri- 

 cato ; squamis subchartaceis, exterioribus pauUo brevioribus linearibus 

 seu lanceolatis, marginibus superne tenuiter scariosis pectinato-fimbri- 

 atis ciliatisque, intimis appendice scariosa lacera parva superatis ; 

 corollis flavidis, lobis fauce longioribus. — Rocky Mountains of Colo- 

 rado Territory, at the elevation of 8-9,000 feet, coll. Parry (no. 34), 

 and Hall and Harbour (no. 340), which I had doubtfully referred to 

 Cirsium edule in the account of their collections : also Vasey, no. 350, 

 referred to Echenais carlinoides, and Wolf and Rothrock, no. 4G0. 

 Hall and Harbour's no. 341 is probably a hybrid of this with C. erio- 

 cephalus. In foliage this resembles C. (Echenais) Sieversii. In the 

 involucre, &c., this species and some forms of the next offer a comjilete 

 transition between Echenais and the foregoing section, and they seem to 

 be further connected by hybrids or by variations. The delicate fringe 

 of the outer involucral scales is usually pectinately dissected into almost 

 setiform divisions, often passing into or mixed with long and soft jointed 



