MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 87 



Siberia, North America and Greenland. Watson's specimens agree exactly with 

 the figure of P. Altiaca in Ledebour's Illustrations, and this name is the only one 

 available, as both disseda and pinnatifida have been used for other species, and subquin- 

 ata is much more recent. Specimens of this variety seen : 



British Rocky Mountains : Drummond ; Macoun, No. 7333, 1890 (Kicking Horse 

 Lake). 



Utah : Watson, No. 335, 1869. 



Potentilla nivea prostrata (Eottb.) Lehm. 



Potentilla prostrata Eottb. Skrift. Kjorb. Selsk. Laerd. & Vidensk. 10 : 453. 1765-9. 



Potentilla nivea prostrata Lehm. Mon. 184; Stirp. Pug. 9 : 69; Eev. Pot. 169; Ser. in DC. Prod. 

 2 : 572; Lange, Consp. Fl. Groenl. 9; Eosenvinge, ihid., 656; Don, Gard. Diet. 2 : 550 ; Walp. Ann. 

 2 : 509. 



Stems prostrate, compressed ; flowers glomerate at the top of the stem. 



Occurs in Greenland. 



Of these varieties var. subviridis approaches P. nana, var. Altiaca, P. saximontana and var. prostrata, 

 P. Hooheriana. 



6g. Potentilla villosa Pall. 



Potentilla villosa Pall.; Pursh, Fl. Am. Sept. 353. 1814. 

 ^ Poir. in Lam. Enc. Meth. Suppl. 4: 541; Lehm. Mon. Pot. 28 and 166; Sprengel, 

 Syst. Veg. 2: 540; Seringe in DC. Prodr. 2: 573; Don, Gard. Diet. 2: 550; Dietr. Syn. 

 PL 3: 178; Walp. Rep. 2: 34; Ann. 2: 507; Lehm. Rev. Pot. 171; Presl. Epim. Bot. 

 198. 



Nutt. Gen. N. Am. PL 1: 310; Eat. Man. Ed. 5: 343; Ed. 6: 280; Ed. 7: 456; 

 Torr. & Gray, FL N. Am. 1 : 442; Eat. & Wr. N. Am. Bot. 372; Rydb. Bull. Torr. Bot. 

 Club, 23: 301. 



Cham. &. Schlecht. in Linnaea, 2: 22; Bong, Veg. Ins. Sitcha, 132; Lehm. in Hook. 

 Fl. Bor. Am. 1: 194; Hook. & Arn. Bot. Beechey's Voy. 123; Ledeb. Fl. Ross. 2: 58; 

 Presl. Ep. 198; Seemann, Bot. Herald, 29; Coville, Cont. U. S. Nat. Herb. 3: 339. 



Potentilla lucida Willd.; Schlecht. Mag. Ges. Naturf Fr. Berlin, 7: 296. 1813. 



Potentilla leucochroa Lindl. in Wall. Cat. PL Ind. Orient. No. 1019, fide Lehmann. 



Potentilla fragiformis villosa Regel & Tiling, Fl. Ajan. 85*. 



Wats. Proc. Am. Acad. 8: 559. Macoun, Cat. Can. PL 140, 1883; Steinejer, 

 Proc. U. S. Nat. Mus. 1885: 532. 1885. 



