20 Rydberg : Studies on the Rocky Mountain flora 



is related to A . gracilens and A . aurantiaca and should have been 

 included in the latter as characterized by Professor Nelson. Ago- 

 seris rostrata is not closely related to either but is the next relative 

 to A. grandiflora of the Pacific Slope, having the same short outer 

 bracts and elongated inner ones and the same very long and 

 slender beak of the achenes, nearly three times as long as the 

 body. It is the "T. grandiflorum as to our range," an expression 

 which Professor Nelson erroneously uses under Troximon mon- 



tanum. 



Agoseris turbinata sp. nov. 



Perennial with taproot and short caudex; leaves narrowly 

 linear, 7-15 cm. long, 1-5 mm. broad, glabrous, bluish green, the 

 midvein and base often purplish, entire, attenuate; scape about 

 3 dm. high, slender, sparingly villous, more densely so under the 

 head; involucres turbinate, 17-20 mm. high; bracts all narrowly 

 lance-linear, villous on the back as well as on the margins, with 

 dark purple middle and yellowish green margins; ligules 15-18 

 mm. long, yellow with purplish veins, turning pinkish in age; 

 beak of the achenes short and striate. 



This resembles in many respects Agoseris parviflora in habit, 

 but differs in the villous scape and involucre and in the beautifully 

 variegated bracts. 



Alberta: Gravel Slope of Tunnel Mountain, McCalla 2063 

 (type, in herb. N. Y. Bot. Gard.). 



Agoseris obtusifolia (Suksd.) Rydb. nom. nov. 

 Troximon grandiflorum obtusifolium Suksd. Deuts. Bot. Monats. 



18: 98. 1900. 



This is characterized by the broad oblong obtuse lobes and 

 the obtuse or even rounded apex of the leaves. I think that it 

 deserves specific rank. It has been collected in western Idaho. 



Agoseris tenuifolia (A. Gray) Rydb. nom. nov. 

 Troximon grandiflorum tenuifolium A. Gray, Bot. Calif. 1 : 438, 



in part. 1876. 

 Troximon laciniatum A. Gray, Proc. Am. Acad. 19: 72, in part. 



1883. Not Stylopappus laciniatus Nutt. Trans. Am. Phil. 



Soc. II. 7: 432. 1841. 



In the Botany of California Gray gives a short description of 



