OF ARTS AND SCIENCES. 43 



Var. ocnROCENTRUS (Cirsiiwi ochrocentrum Gray, PI. Fendl.) : 

 foliis profuiide piimatifidis, lobis squamisque involucri si^inis ochraoeis 

 lougioribus armatis. — W. Texas and New Mexico to the Sierra 

 Kevada, California. A most marked variety, which may reclaim a 

 specific rank. 



Var. Grahami : format megacephalce accedens, elatior ; foliis siib- 

 membranaceis superne mox ijlabratis ; involucri s(|uamis exterioribus 

 spinula brevissima cuspidatis, interioi ibus extus minute scaberulis mar- 

 gins scabro-ciliolatis ; lloribus sanguineo-purpureis. Girsiiim Grahami 

 Gray, PL Wright. 2, p. 102; Hook. Bot. Mag. t. 5885. — Arizona, 

 C. Wright, Thurber, «&;c., in low grounds, to which its greater height, 

 softer and greener less prickly leaves, «&;c., may be attributed. 



•H- -H- Antherarum appendices apice deltoideo parum acuto. 



C. Breweri. Orgyalis ad 10-pedalem; foliis elongatis pinnatifidis 

 cauleque lana adpressa undique iucauis, lobis brevibus angustis spinosis; 

 capitulis parvulis paniculatis brevissime pedunculatis ; involucri globosi 

 primum araneosi squamis arete irabricatis, exterioribus oblongis lance- 

 olatisque coriaceis, apice viridi-notato viscidulo spinula gracile patente 

 abrupte superato ; corollis purpureis mine ochroleucis, lobis fauce 

 brevioribus ; styli nodo sub parte stigmatifera filiformi manifesto. — 

 California, mostly in wet ground, Strawberry Valley near Mt. Shasta, 

 Brewer ; Humboldt and Mendocino Counties, Bolander, Kellogg, and 

 Harford (coU. no. 557, 562, 563) ; borders of Nevada near Carson, 

 Anderson ; also, a somewhat less woolly form, in a caiion of the San 

 Juan Mountains, Monterey County, Brewer. Heads several or numer- 

 ous in a branching panicle, an inch or less in height. Corolla with one 

 lobe more or less shorter than the throat, the other four much more 

 united. — This, being a Californian species, might be taken for Cirsium 

 Douglasii DC, but it is not found in Douglas's collections. The 

 specimen on which De CandoUe established his species was doubtless 

 from Columbia River near the coast ; it is the plant referred by Hooker 

 to Carduus discolor, and is the same as Nuttall's Cirsium Hookerianum, 

 i.e. the Cnicus undidatus. The present species appears to have been 

 first collected by Professor Brewer, whose name it may bear. 



* * * * Folia subtus saltem albo-lanata : appendices antherarum 

 apice deltoideo parum acuto : involucri oblongi nunc cylindraceo- 

 campanulati ; squamaj minus crebras, laxiuscule imbricatae, tenuiores 

 minus intequales, in spinulam rectam vel cuspidem attenuatce : 

 corolla? sanguiueae. Capitula speciosa, sesqui-bipollicaria. 



