12 Rydberg : Studies on the Rocky Mountain flora 



Rydb. to a synonym of .S. tenuifoUa (Torr.) Hall. In the her- 

 barium of the New York Botanical Garden there is a good speci- 

 men of P. ramosa collected by Aven Nelson and Elias Nelson, 

 viz., no. 5985. This is labeled Ptiloria paucifl.ora (Torr.) Raf. 

 It agrees well with Nelson's description of 6'. pauciflora., except 

 as to the pappus, but it is very unlike the type of Prenanthes 

 pauciflora Torrey, collected by James and preserved in the her- 

 barium of Columbia University. Ptiloria paticiflora, so far as 

 I know is not found so far north as Wyoming. 



Adopogon 



Professor Nelson has readopted Krigia for this genus and 

 perhaps rightly so, as most of Necker's genera can scarcely be 

 called published. However, he wrongly adopts the name Krigia 

 virginica (L.) Nels. for the only species found in the region, not- 

 withstanding the fact that there is an older Krigia virginica 

 (L.) Willd. 



Crepis 



Under Crepis riincinata we find in the New Manual the follow- 

 ing synonyms and remarks. "(C platyphylla Greene . . . ; 

 C. glaucella Rydb. . . . , C. tomentidosa, C. perplexans. and 

 C. petiolata Rydb. . . . To recognize the foregoing one would 

 first have to assume a hypothetical C. runcinata.y There is 

 hardly need of assuming a hypothetical C. rimcinata, for there 

 are found in the region where the type of Hieracium runcinatiim 

 Torr.* was collected at least two plants which agree very well 

 with the original description. One is the plant for which I have 

 adopted the name Crepis ruficinata, the other is C. riparia A. 

 Nels. Most of James' plants are in the old Torrey herbarium, 

 but the type of Hieracium runcinatiini is not there. Torrey's 

 description is very clear, however, and calls for a strongly hairy 

 plant. All the synonyms cited above, except C. platyphylla, repre- 

 sent glabrous plants (except as to the involucres), and more closely 

 related to C. glauca than to C. runcinata. Crepis platyphylla 

 Greene is closely related to C. riparia and perhaps not distinct, 



*Ann. Lye. N. Y. 2: 209. 1826. 



