OF ARTS AND SCIENCES. 55 



of New Mexico, is a marked species, standing next to S. renifolius, 

 Porter. 



Senecio aureus, L., has to be in part recast. S. Elliottii, Torr. &. 

 Gray, appears to come into tlie var. obovatus, and S. subnudus, DC. is 

 only an attenuated and usually mouoceplialous variety of S. aureus. 



Senecio Neo-Mexicanus is a name now given to a troublesome 

 species, collected in New Mexico by Wright, Thurber, Htnry, Greene, 

 &c., in Arizona recently by Lemmon and Pringle, and within the bor- 

 ders of California by Parish, specimens of which have been variously 

 and dubiously referred to S. Fendleri, multilobatus, aureus, «&c. 



Senecio lobatus, Pers. A delicate and depauperate state of this 

 common species, recently collected by Palmer in Southern Texas, is 

 the same as Berlandier's 1741, on which Klatt, in Abhand. Nat. Gesell. 

 Ilalle, XV., has founded his S. imparipinnatus. 



Senecio Maubensis. Ilerbaceus, floccoso-tomentosus ; caule 2-3- 

 pedali e rhizomate nodoso; foliis oblongo-lauceolaiis penniveniis, argute 

 denticulatis (vel inferne dentatis), supra, laxe araneoso-lanatis subtus 

 tomento densiore incanis, radicalibus in petiolum attenuatis, cauliuis 

 basi subcordata sessili apice sensim attenuato-acuminato ; capitulis sat 

 numerosis subpaniculatis (lin. 5-6 longis) multifloris ; involucro brac- 

 teolis subulatis calyculato ; ligulis aut 1-2 brevibus aut nullis ; corol- 

 lis disci pallide flavis breviter o-dentatis ; acheniis fere glaberrimis. — 

 On the Sierra Madre south of Saltillo, Coahuila, Palmer, 756. Re- 

 motely allied to iS. multidentatus, Scliultz Bip. 



Senecio salignus, DC. 1. c. Near Parras, and in the northern 

 part of Nuevo Leon, 743, 744, the latter a slender form, same as Ber- 

 landier's 1367, on which is founded S. axillaris, Khxtt, 1. c. 



Arnica Nevadensis. Semipedalis, puberula, subcinerea ; foliis 

 integerrimis oblongis plerumque obtusis subchartaceis, cauliuis (paribus 

 2-3) sessilibus, imis radicalibusque obovatis et subrotundis longiuscule 

 petiolatis basi aut abrupta aut subito angustata ; capitulis paucis longe 

 pedunculatis iis A. cordifolicB referentibus. — California, collected sev- 

 eral years ago on Lassen's Peak, by Mrs. Austin, in a cinereous form : 

 not a little resembling WJdtneya dealbata, the rays almost an inch long. 

 Now again collected in the northern Sierra Nevada, altitude 9,000 ft., 

 by Mr. Pringle, in a greener form, with smaller rays, some of the 

 radical leaves abrupt at base, but none subcordate ; the largest barely 

 two inches long. 



Arnica Sachalinensis. Fere glaberrima ; caule robusto bipedali 

 multifoliato; foliis oblongo-lanceolatis acutis acutissime serratis nervoso- 

 venosis basibus angustioribus connato-vaginatis (summis exceptis); 



