Rydberg : Studies on Rocky Mountain Flora 179 



This has sometimes orange rays and has then been confused 

 with S. crocatus, but it lacks the winged petioles of the lower 

 leaves and the large auricles of the upper. It often reaches a 

 height of 3 dm. and then many of the stem leaves are also spatu- 

 late. Such a form with more permanent woolliness is Watson's 

 no. 669; otherwise I cannot distinguish it from 5. cymbalariodes. 

 [Plate 5, f. I.] 



British America: Mackenzie River, 186 1-2, /. S. Onion. 



Montana: Park Co., 18S7, Tweedy, j^j, in part; Silver Bow 

 Co., Mrs. Moore ; Jack Creek, 1897, Rydberg &■ Bessey, ^266. 



Wyoming: Beaver Caiion, 1895, Rydberg; Bacon Creek, 

 1894, Aveji Nelson, go6. 



Idaho : Mt. Chauvet, 1897, Rydberg &- Bessey, j26y. 



Utah : Wasatch Mts., 1869, 5. Watson, 66 g. 



Washington: Mt. Paddo, 1882, W. N. Snksdorf ; Columbia, 

 Niittall (type). 



13. Senecio Jonesii sp. nov. 



A glabrous perennial : stem about 3 dm. high, slender, terete : 

 basal leaves rounded-obovate, sinuately toothed, sometimes with 

 a pair of small lobes at the base ; their petioles often tinged with 

 red : stem leaves oblanceolate in outline, pinnatifid with oblong 

 segments, generally short-petioled : cyme corymbiform : heads 

 about 8 mm. long: bracts 12-15, lanceolate, acuminate, about 2^ 

 as long as the disk, membranous margined ; calyculate ones few, 

 linear : rays about 5 mm. long and 2 mm. wide, 4-nerved : achenes 

 very strongly striate, glabrous. 



Nearly related to the preceding, but differing in the toothing of 

 the leaves and the form of the bracts. The type was collected at 

 an altitude of 3300 m. [Plate 6, i. 5.] 



Utah: Alta, Wasatch Mountains, 1879, M. E. Jones, 11 25 

 (type in the Columbia Herbarium).' 



14. Senecio subcuneatus sp. nov. 



Perennial with a branched caudex, slightly floccose when 

 young, glabrate in age : stems 3-4 dm. high : basal leaves about 

 5 cm. long, spatulate or cuneate, dentate or serrate above the 

 middle, entire at the base and tapering into a short petiole, rather 

 thick : lower stemleaves narrowly cuneate, short-petioled, dentate 

 at the apex : upper ones linear and sessile, often sharply dentate : 

 cyme corymbiform : heads about 8 mm. high: bracts about 15, 



