178 Rydberg : Studies ox Rocky Mountain Flora 



Tracy, no. 625, S. crocatns Rydberg. This mistake is just as un- 

 pardonable because that plant shows none of the characters, assigned 

 to S. mircus var. croccus Gray, except the color of the rays, and this 

 character Professor Greene, agrees with me in regarding as of little 

 value. That Professor Greene and other botanists may know what 

 I now mean by S. crocatns I shall give a diagnosis, here following 

 Professors Greene's example in the case oi Aiitoiiiaria media. 



A glabrous perennial with a short erect rootstock : stem 

 1.5-3 <^"^- hig''' • basal leaves 2-3 cm. long, obovate or spatulate, 

 crenate or subentire with a winged petiole : lower stem leaves 

 similar but with broader, winged petioles which are somewhat 

 auricled at the base, or else oblong without distinction between 

 blade and petiole and then more auricled : upper stem leaves 

 ovate or triangular with very large and large-toothed auricles : 

 cyme small and compact with 2-5 mm. heads, which are 8—10 

 mm. high : bracts about 20, linear : rays j—*^ mm. long and 

 1.5-2 mm. wide, orange to pale yellow, achenes striate, glabrous. 

 [Plate 5, f 13.] 



Colorado : Middle Park, 1862, Hall & Harbour, jj2, in part 

 (type) ; J2p, in small part; 1868, Geo. Vascy (Powell's Expedi- 

 tion), jyo i> ; South Cottonwood Gulch, 1892, C. S. Sheldon; 

 Gray's Peak, 1872, John Torrey ; (?) Little Kate Mine, 1898, 

 Baker, Earlc & Tracy, j6g;'^^ South Park, 1871, Canby ; 

 Long's Peak, 1886, Letternian (depauperate). 



Wyoming: La Plata Mines, 1895, Aven Nelson, lySg.' 



Senecio DiMORPHOPHYLLUS Greene, Pittouia, 4 : 109. 1900 



I have not seen any specimens of this species, and hav^e not 

 been able to include it in the key. It is described as being a foot 

 (about 3 dm.) high, light green and with long golden-yellow rays. 

 Otherwise the description reads much like that given above for 

 6". crocatns. The type was collected about Pagosa Peak, Colo., in 

 1899, by C. F. Baker. 



12. Senecio cymbalarioides Nutt. Trans. Am. Phil. Soc. II., 7: 



412. 1841 

 Senecio anreus borcalis Torr. & Gray, Fl. 2 : 442. 1843 J ^- (^^C'-'^ts 

 obovatus Eat. King's Exp. 5 : 190, in part. 1871. 



* These specimens were named Settecio heterodoxus Greene n. sp. , but I can 

 not find any published description. They differ from the rest in being cespitose, with less 

 marked differentiation in the leaves and with traces of floccose pubescence at the bases 

 of the leaves and heads. The species may be distinct. 



