396 



rubricaiilis Lehm. and have made it a variety of the present spe- 

 cies. I regard the other form as a new species and it will be dis- 

 cussed later. 



P. dissecia varies much in the form of the leaves. In the type 

 of P. divcrsifolia Lehm. the lower leaves were pinnate with ap- 

 proximate leaflets, but all the leaves are as often perfectly digitate. 

 The leaflets are larger than in the other related species, oblance- 

 olate, and generally seven in number. In the typical form they 

 are generally appressed-hairy. All specimens seen are from the 

 plain and mountain regions of the West, the range extending 

 from Colorado to California, British Columbia and Saskatchewan. 



PoTENTiLLA DissECTA GLAUCOPHYLLA (Lehm.) Wats. Proc. Am. 



Acad. 7: 556. 1873. 



P. diversifolia glaiicopJiylla Lehm. Rev. Pot. 73. 1856. 

 Leaves nearly glabrous, glaucous-green and always digitate. 

 The range is the same as that of the species, but it is much 

 more common within the United States. 



POTENTILLA DISSECTA KUBRICAULIS (Lehm.). 



p. rubricaidis Lehm. Nov. Stirp. Pug. 2: 11. 1830. 



Leaves somewhat tomentose beneath when young. It may be 

 a hybrid between P. dissecta and P. Jiivea or P. conciniia, as it is 

 rare and only found in the mountains, where these species also 

 grow. 



POTENTILLA DECURRENS (WatS.). 



P. dissecta deciirrens Wats. Proc. Am. Acad. 7 : 557. 1873. 



This species much resembles the preceding, especially the var. 

 glaiicopliylla, but it is a more cespitose plant and has smaller and 

 thicker leaves with prominent veins beneath. The leaflets are gener- 

 ally five and the lower often attached a little lower down and de- 

 current on the petioles, but this is not always the case by far. It is 

 found in the higher moutains of Utah, Wyoming and Montana. 



Potcntilla Raniniculus Lange, Fl. Dan. //. 2g64, from Greenland, 

 comes near to both the preceding, differing from both in the more 

 deeply dissected leaves and scaly rootstock. The leaves resemble 

 much those of P. dccunens, but are perfectly digitate and much 

 thinner. It seems to be a very rare plant. 



