192 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 



Petals ocliroleucous; sepals broadly ovate, mucronate. 10. D. Wrangeliana. 



Petals and sepals more or less reflexed in anthesis, the former yellow, not exceeding the latter. 



11. D. reflexa. 

 Style filiform or nearly so, more than twice as long as the achene. 



Plant about 2 dm. high; petals much longer than the sepals ; leaflets rhombic-obovate. 



12. D. rhombifolia. 

 Plant 4-6 dm. high; petals about equalling the sepals; leaflets cuneate-flabellate. 



13. D. cuneifolia. 



I. Drymocallis arguta (Pursh). 



Potentilla arguta Pursh, Fl. Am. Sept. 736. 1814. 



Poir. in Lam. Enc. Meth. Suppl. 4 : 538 ; Lindl. Bot. Reg. pi. 1379; Don, Gard. 

 Diet. 2 : 558; Dietr. Syn. PL 3 : 186 ; AValp. Rep. 2 : 35 ; Ann. 2 : 477; Lehm. Rev. 

 Pot. 50. 



Eat. Man. Ed. 7: 458; Beck, Bot. 107; Ed. 2, 100; Bigelow, PL Bost. 219; Torr. 

 &Gray, Fl. N. Am. 1 : 445; Eat. & Wr. N. Am. Bot. 374; Torr. Fl. N. Y. 209; Frem. 

 1st Exp. 89 [174] ; Gray, Man. Ed. 1, 122 ; Ed. 2, 119; Ed. 5, 154; Noll, FL Pa. 433; 

 Pac. R. R. Rep. 12: book 2, part 2: 39; Wood, Class Book, 343; Bot. & Flor. 108; 

 Porter, U. S. Geol. Surv. 1870 : 475; Wats. Proc. Am. Acad. 8 : 551; Porter & Coult. 

 Syn. Fl. Colo. 35 (in part) ; Coult. U. S. Geol. Surv. 1872 : 765 ; Man. Rocky Mts. 

 83 ; Wats. & Coult. in Gray, Man. Ed. 6, 158 ; Bailey, in Gray, F. F. & G. Bot. Rev. 

 Ed. 151 ; Rydb. Cont. U. S. Nat. Herb. 3 : 157 and 496; FL Neb. 21: 17 ; Britt. & 

 Brown 111. FL 2 : 209. 



Richardson in Frankl. 1st Journ. 739 ; Ed. 2 : App. 20 ; Lehm. in Hook. Fl. Bor. 

 Am. 1: 186 ; Provancher, FL Can. 189 ; Macoun, Cat. Can. PL 136 and 516. 



Geum agrimonioides Pursh, Fl. Am. Sept. 351. 1814. Not P. agrimonioides Bieb. 



Sprengel, Syst. Veg. 2 : 543 ; Poir. in Lam. Enc. Suppl. 5 : 573 ; Seringe in DC. 

 Prodr. 2 : 554. 



Potentilla confertiflora Torr. Fl. U. S. 499. 1824. 



Spreng. Syst. Veg. 4: 198; Lehm. Stirp. Pug. 3 : 24 ; Torr. Comp. Fl. U. S. 211. 



Bootia .fylvestris Bigel. Fl. Bost. Ed. 2, 206. 1824. 



Potentilla Pennsylvnnica var. arguta.1:oTY. Ann. Lye. N. Y. 2: 197, 127. 



Potentilla obliqua Dougl. (as a syn.) in Hook. Fl. Bor. Am. 1: 186. 1833. 



Potentilla ferruginea DougL (as a syn.) 1. c. Not Paxton. 



Potentilla ghitinosa Pursh (as a syn.) in Lehm. Rev. Pot. 50. 1856. 



Potentilla arguta var. ferruginea Lehm. Rev. Pot. 50. 1856. 



Potentilla Bigeloviana Wenderoth, Sem. Hort. Marb. 1841*. 



Linnaea, 16: Litt. 112. 



