1902] Greene — Some New Northwestern Composite. 281 



Arnica aurantiaca, Greene, Torreya i, 42, founded on a 

 plant of Oregon collected only by Mr. Cusick until now, must be 

 credited to British Columbia, Mr. Macoun's No. 26,934 f«"om the 

 Chilliwack region matching perfectly the originals of the species. 



Arnica confinis. Less than a foot high, monocephalous, or 

 else with also a pair of monocephalous peduncles from the axils ot 

 the uppermost pair of leaves, these surpassing the terminal one ; 

 herbage of a light green, viscid-puberulent as to the foliage, the 

 stem with a sparse hairiness : lowest leaves obovate to oblanceo- 

 late, an inch long or more and petiolate, the cauline in about three 

 pairs, ovate to lanceolate, i to 2 inches long, callous-denticulate, 

 or serrate-dentate, or even subentire, acutish ; heads of middle 

 size, the involucral bracts biserial, acuminate, sparsely hirsute : 

 rays deep-yellow, not large ; disk-corollas with hirsute tube and 

 naked limb about equal ; achene^ with a few hirsute hairs ; 

 pappus tawny, subplumose. 



Chilliwack Valley, B.C., Mr. Macoun, No. 26,933, ^^ characters 

 of pubescence, flower and fruit this approaches A. ova/a, Greene, 

 but in foliage and habit it differs widely. 



Arnica aspera. Stems clustered, often 2 feet high, equably 

 leafy to the corymbose summit, loosely hirsute, more strongly and 

 quite retrorsely so toward the base : leaves about 2 inches long, 

 ovate-lanceolate, sessile by a broad base, the upper longer, the 

 lower shorter than the internodes, rough-hairy on both faces, 

 saliently callous-dentate : peduncles several, slender ; involucres 

 small for the plant, campanulate, their bracts uniserial, hispidulous 

 with pustulate hairs ; rays very obtuse and only minutely triden- 

 tate ; disk-coroUas with very short tube and rather longer limb 

 about equally and very sparsely setose-hairy : achenes setose- 

 hairy; pappus tawny, subplumose. 



The type of this species is a plant found by myself on Mt. 

 Rainier, 19 Aug., 1889, and then supposed to he A. amplexicaulis y 

 which I have now for some time known to be a very different 

 plant. A. aspera has also been collected by Mr. Piper at 

 Snoqualmie Falls, Washington, and again in the Olympic Moun- 

 tains. Mr. M. W. Gorman obtained it in 1897 among his plants 

 of the Washington Forest Reserve. 



