Rydberg : Rocky Mountain flora L35 



the margin of the narrower base, oblanceolate, sessile or short- 

 petioled, usually more or less runcinate-toothed ; scape glabrous ; 

 involucres turbinate-campanulate, about I cm. high, more or less 

 glandular-hairy with yellowish hairs and slightly tomentulose 

 when young ; bracts linear-lanceolate, acuminate ; rays yellow, 

 about I cm. long ; achenes brown, strongly ribbed ; pappus white. 



This has been confused with C. runcinata, but that species has 

 thinner haiiy leaves, which are scarcely glaucous. C. confusa is 

 really more closely related to C. glauca, from which it differs only 

 in the pubescence of the involucre and the usually broader leaves. 

 C. confusa grows in valleys from North Dakota and Alberta to 

 Nebraska and Colorado. As the type may be regarded : 



Wyoming: Encampment, Carbon Co., 1901, Tweedy 40S1. 



Crepis denticulata sp. nov. 



Scapose perennial ; leaves basal, obovate or more rarely obo- 

 vate-oblanceolate, glabrous or nearly so, obtuse, less than I cm. 

 long, denticulate or with a few lobes towards the base ; scape 1—3 

 dm. high, glabrous up to the inflorescence ; involucre turbinate, 

 scarcely 1 cm. high, hirsute with glandular black hairs, as well as 

 the branches of the inflorescence ; ligules about 8 mm. long; achenes 

 brown, strongly ribbed ; pappus white. 



This species is nearest related to C. riparia, but is a much 

 smaller plant in every part and with glabrous leaves. It grows in 

 the mountains. 



Colorado : Lake John, North Park, 1898, Shear & Bcsscy 

 4.004 (type). 



Wyoming : Fort Bridger, 1873, Porter. 



Utah : 1875, Parry 62 ; Jordan Valley, 1869, Watson J12. 



Crepis angustata sp. nov. 



Crepis gracilis Rydb. Mem. N. Y. Bot. Gard. I : 461, in part. 



1900. Not C. occidentalis gracilis D. C. Eaton. 



Perennial, whole plant more or less canescent-puberulent and 

 scabrous ; stem 3—7 dm. high ; basal leaves and lower stem-leaves 

 petioled, runcinate ; main body narrowly linear-lanceolate, acu- 

 minate ; lobes linear or linear-lanceolate, usually curved forward ; 

 upper stem-leaves entire and sessile ; involucre cylindric, about 1 

 cm. high and 5 mm. broad ; bracts 5-7, linear-lanceolate, acute, 

 canescent but not glandular, with a few minute calyculate ones 

 below ; flowers 5—10. 



