MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY Gl 
(Wats.), P. multisecta (Wats.), P. pinnatisecta (Wats.) Aven Nelson, and P. Drummondii 
Lehm., and also P. rubricaulis Lehm., but I have not seen any authentic specimens 
of that species. There are three forms that fairly agree with Lehmann’s description and 
figure of P. rubricaulis. One differs from P. diversifolia Lehm. only in being smaller and 
with leaves slightly whitened beneath. Following Gray and Watson, I took this to be P. 
rubricaulis Lehm. and made it a variety of the present species. I described it in the Bul- 
letin of the Torrey Botanical Club, 28: 396, under the name P. dissecta rubricaulis. It 
may be a hybrid between P. dissecta and P. nivea or P. concinna. It has been collected by 
Hall and Harbour in 1862 and H. Engelmann in 1856, in Colorado and Wyoming respec- 
tively. I have, however, since that time found specimens of another species, that agree 
more closely with Lehmann’s description and figure, and regard that as the true P. rubri- 
caulis Lehm. 
P. dissecta varies much in the form of the leaves. In the type of P. diversifolia Lehm. 
the lower leaves were pinnate with approximate leaflets, but all the leaves are as often 
pertectly digitate. The leaflets are larger than in the other related species, oblanceolate, 
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 ex- 
tending from Colorado to California, British Columbia and Saskatchewan. 
Potentilla dissecta glaucophylla (Lehm.) Wats. 
Potentilla glaucophylla Lehm. Del. Sem. Hort. Bot. Hamb. 1836: 7. 
Lehm. Linnaea, 7: Litt. 83. 
Potentilla diversifolia glaucophylla Lehi. Rey. Pot. 73. 1856. 
Wats. King’s Exp. 5: 86; Walp. Ann. 2: 483. 
Potentilla dissecta glaucophylla Wats. Proc. Am. Acad. 8: 556. 1873 
Porter & Coulter, Syn. Fl. Col. 37; Coulter, Man. Rocky Mts. 85, 1885; Macoun, 
Cat. Can. Pl. 517, 1886; Rydb. Bull. Torr. Bot. Club, 23 : 396. 
Leaves nearly glabrous, glaucous-green and always digitate. 
co | 
The range is the same as that of the species, but it is much more common within 
the United States. 
36. Potentilla decurrens ( Wats.) Rydb. 
Potentilla dissecta var. decurrens Wats. Proc. Am. Acad. 8: 557. 1873. 
Coulter, Man. Rocky Mts. 85. 1885. 
Potentilla decurrens Rydberg, Bull. Torr. Bot. Club, 23: 396. 1896. 
