MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 79 



Eat. Man. Ed. 7 : 456 ; Eat. and Wr. N. Am. Bot. 372 ; Watson, Proc. Am. Acad. 8 : 

 559; Rydb. Bull. Torr. Bot. Club, 23 : 305. 



Lehm. in Hook. Fl. Bor. Am. 1 : 194 ; Ledebour, Fl. Eoss. 2: 59; Macoun, Cat. 

 Can. PL 140. 



Potentilla grandiflora fragiformis Ser. in DC. Prod. 2 : 572. 1825. 



Illustrations: Lehm. Mon. Pot. jj»/. 15. Flate 3 l,f. 1; dissection of flower, /. ^; 

 pistil, /. 3 ; stamen, /. 4. ; fruiting hypantbium and calyx, /. 5. 



Somewhat tufted ; stems several from the caudex, more or less villous, ascending or 

 erect, 1-2 dm. high, few-leaved and few-flowered with rather long erect branches. Stipules 

 ovate, the lower scarious, brown and acute, the upper herbaceous and obtuse or acute ; 

 leaves ternate with sessile leaflets, more or less villous, the odd leaflet larger, ovate with 

 cuneate base, the lateral ones obliquely elliptic or obovate, all toothed with obtuse and 

 more rounded teeth than in P. marginata. Hypanthium villous, in fruit 10-15 mm. in 

 diameter; bractlets generally broadly elliptic and obtuse, equalling or often exceeding 

 the ovate rather acute sepals. Petals obcordate or broadly cuneate and deeply emargi- 

 nate, about half longer than the sepals. 



Differs from P. nana in being in every respect more robust and with stems 1-2 dm. 

 high. It somewhat approaches P. villosa in habit, but lacks the tomentum and has 

 much smaller flowers. It comes nearest the Caucasian and Siberian P. gelida Meyer, but 

 differs in its hirsute pubescence. P. fragiformis is mainly Siberian, but has been col- 

 lected on the Aleutian and Behring Sea Islands. 



Alaska: J. M. Macoun, Nos. 34 and 44, 1891; Merriam, 1891; J. T. White, 1894. 

 Gape York: Grinnell's Arctic Exped. 



62. Potentilla nana Willd. 



Potentilla nana Willd ; Schlecht. Mag. Ges. Naturf Fr. Berhn, 7 : 296. 1813.* 



Lehm. Mon. 29 and 181 ; DC. Prod. 2: 573; Dietr. Syn. PI. 3 : 178; Walp. Rep. 

 2 : 33 ; Ann. 2 : 506 ; Lehm. Rev. Pot. 161. 



Eat. Man. Ed. 7 : 456 ; Torr. & Gray, Fl. N. Am. 1 : 441 ; Eat. & Wr. N. Am. 

 Bot. 372; Rydb. Bull. Torr. Bot. Club, 23 : 305; Britt. & Brown, Ill.T^l. 2 : 211. 



Lehm. in Hook. Fl. Bor. Am. 1 : 194; Schlecht. Linnaea, 10: 98; Hook. & Arn. 

 Bot. Beechey's Voy. 123 ; Seemann, Bot. Herald, 29 and 55; Durand, Journ. Acad. Phil. 

 1856: 190. 



Potentilla verna Hook, in Scoresby's Greenl. 431 ; Hook. Sabine's Voy. 31. 



Potentilla Groenlandica R. Br. in Ross' Voy. 142. 



Potentilla nivea /3 R. Br. in Parry's 1st Voy. 277 (in part); Torr. & Gray, Fl. N. 

 Am. 1 : 441 ; Hook, in Parry's 2d Voy. 15 ; Walp. Rep. 2 : 33. 



