68 PROCEEDINGS OF THE ACADEMY OF 



var. /?, Torr. and Gr. FL, verging towards the next. 324. S. axdixus, Nutt. ? 

 from the locality (but the heads resemble those of the last, and are of equal 

 size), or an mi described species, if Nuttall's S. andinm is Hooker's S. serra; 

 intermediate between the latter and 5. trian da r. Fremont collected a 

 single specimen of it in his second expedition. 327. S. eremopiiilus, Richards. 

 328. S. lonqilobus, Benth., from the plainsfwith pinnately-parted leaves 

 (Parry's No. 407) ; with a mountain form, having the leaves all entire and the 

 heads narrow. The latter is the same as Parry's No. 406. The variations of 

 S'filifoliuB) h, lobusy gpartioides and RiddellU^ are now wholly inextricable. 

 330. S. cants, Hook., a form with large heads and the leaves 'all entire, the 

 same as Parry's No. 20 ; " alpine and subalpine." 229. S. AffBBtrs var. al- 

 pinus, Gray, Enum. PI. Parry, No. 63. This holds its character ; but the heads 

 are sometimes as many as three in a corymb. Different from & aun as it 

 appears, it is inseparably connected with it through the var. boreaJis. &13>, 

 S. auheus, var. aJphuis, werneria jblius,* — very peculiar, truly alpine form, 

 which would almost anywhere be regarded as a very distinct new species ; 

 but I think it runs into the last and into Wright's 403, &c. These forms all 

 teach that S. subundu8 t DC, and S. resedi/oJius, Less., will also p into S. 

 aureus. Indeed, I know not where the species will stop. 332. S. aurkus, L. ? 

 var. croceus. Middle Park, &c. Both Dr. Parry (who has it as No. 405) and 

 Mr. Hall note this as a form of the common S. aureus with copper-colored or 

 saffron-colored flowers, and I cannot gainsay it, after reviewing a suite of speci- 

 mens. Some of Hall and Harbour's specimens, except in the anomalous 

 color of the flowers, very much resemble S. aquati is of the Old World. One 

 form is discoid. 333. S. aureus, var. boreatis and var. Balsamii . Torr. and 

 Gr.; glabrate or woolly, in various forms. "A common and very variable spe- 

 cies, at all localities and heights, except strictly alpine. Borne of the speci" 

 mens are passing to S. Fendleri, Gray. 



321. Arnica asgustifolia, Tahl. ; broad-leaved forms of A. alpina, Laest. 

 " A variable species, from the low middle to the alpine region, flowerinsr early 

 and late." 335. A. mollis, Hook. ; " alpine and subalpine.' 7 33 G . A. cor- 

 difolia, HooTTT mixed with some A. i ^ym-v^r A. Boi ird, (which Dr. Parry 

 abundantly gathered in Berthoud s Fass : No. fOS of his collection) ; the lat- 

 ter known by the sessile cauline leaves, the narrower heads, and the almost 

 glabrous achenia. 337. A. Chamissoms, Less. South Park, &c. Passes into 

 leafy forms of A. ang tstifolia. 338, A. axgustifolia ? var. eradia , or per- 

 haps a distinct species. This is Parry's No. 10, resembling some rough-hirsute 

 forms of A. mgusti i, approaching A. mollis, but the cauline leaves de- 

 cre ing upwards ; and the rayless character holds in the numerous specimens 

 gathered in 1862 : the achenia are glabrate, although the ovaries are pu- 

 bescent. It can hardly be a form of the Californian A. discoidea ; but it needs 

 farmer comparison with that species.* 



Cirsium acaule, All., var. Americanum. " Subalpine ; common in wet 



*>fvecio a L.. vnr. (alpixtjs) TYF.RNERUEFOLirs : multicipitiV.Tsp . prin a traeh- 



n : f : ihbus confertis spathulato-oblanceolatia Ben spat hula to- li attenu- 



a lis av.niis integerrimki marginibus *a?j *ime reyolu 



(cum petiolo 2-4-poll. longia 2-31in.lati ipo aphyllo, (3- ollicari) bra< ulato- 



l ta ? lana olnrolutis instrueto coryml -&-5-cepbalo ; capitul c, & aurei. The 1 



may likened to those of W< riaatotCul olium or rtivale. 



1! fuUowing might be thought to be a form of this, or of Wright's 4U3: but, besides the small 



lea^ theachei are papfllofe-hirsul instead of perfectly glal us. 



Sexecio Thurberi p. nov. : c8E>j.ito>us, rano-tomentulosus mox sc< %% fo plerisque 



radi libus eonfertis angustissime linearibus 1 isim at una petiol< iter pollicem 



«*v«u» wro« papiiumo-nineun ^. mm*?, var. py , Uray, m Bot. M J; uiat. p. 103. 



Santa Rita del < w Mexico, Profc Thvr r. Dr. J. M. Bi ow. 



t ietrvdymia r< i , DC., the fonn with rather smaller heads and shorter 1 yes (T. inrr- 



mi*. .Nutt.) 5 was tolled* • I in the Middle Park by Dr. Parry. No. 410. 



[Mar. 



