Rydbekg: Rocky Mountain flora 159 





4-9 cm. long; blades thick, oval, 3-6 cm. long, 1.5-4 cm. wide, 

 rounded or obtuse at the apex, abruptly contracted below, coarsely 

 dentate-crenate with triangular-ovate, obtuse teeth ; lower stem- 

 leaves similar, the petioles with enlarged toothed or lobed stipule- 

 like bases ; the upper short-petioled and narrower ; inflorescence 

 corymbiform ; heads many, about 1 cm. high ; bracts linear, 

 abruptly acute, 5-7 mm. long, slightly villous ; rays bright-yellow, 



i~— 12 mm. long, about 2 mm. wide; achenes glabrous, round- 

 angled. 



This is perhaps most closely related to vS. cymbal arioidcs, but 

 differs in the stouter, more branched and more leafy stem and the 

 large ample stem-leaves. It grows in the higher mountains of 

 Colorado. 



Colorado : Mt. Harvard, 1896, F. E. Clements jp (type) ; 

 Robinson, Aug. 23, 1896, C. L. Shear 333 j. f U-S-*~k'A 



» Senecio Tracyi Rydb. 9* ^b** 



Perennial with a short rootstock ; stem about 4 dm. high, 

 glabrous ; basal leaves glabrous, long-petioled ; petioles 3- 10 cm. 

 long, slender; blades round-oval or oval, thin, 1.5-5 cm. long, 

 1-3 cm. wide, entire or merely wavy, rounded at the apex, rounded, 

 truncate or subcordate at the base; stem-leaves lanceolate, acu- 

 minate, 2-6 cm. long or the uppermost still smaller, sinuate-cre- 

 nate, the lower cuneate at the base, the upper auriculate-clasping; 

 inflorescence a small compact cyme ; heads 8-1 1, broadly turbi- 

 nate, 6-7 mm. high ; bracts linear, abruptly acute, glabrous, the 

 calyculate ones subulate, sparingly arachnoid ; rays yellow, 6-8 

 mm. long, about 2 mm. wide. 



The species belongs to the 5. aureus group and is somewhat 

 intermediate between S. crocatus, S. pyrrochrous and S. fedifolius. 

 From the two first it differs in the paler rays and the form of the 

 stem-leaves and from the last in the much larger size and the pres- 

 ence of rays. It grows at an altitude of 3150 m. 



Colorado: Bob Creek, west of Mt. Hesperus, July I, 1898, 

 Baker, Earle & Tracy 276. 



J Senecio turbinates Rydb. sp. nov. *(.)*- S<W*« 



Perennial with a cespitose rootstock ; stem scapiform, about 

 1.5 dm. high, more or less floccose ; basal leaf-blades cuaeate- 

 obovate, thick, 2-3 cm. long, 8-18 mm. wide, loosely floccose 

 when young, dentate above the middle, rounded at the apex, 



