78 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 



Macoun, Cat. Can. PL 140. 



Illustrations: Lehm. Rev. Pot. pi. 51. Plate 31, f. 6; dissection of flower, /. 7; 

 pistil,/. 8; stamen,/. 9; fruiting hypanthium and calyx,/ 10. 



Stems from a scaly creeping rootstock, minutely puberulent, 2-3 dm. high, few- 

 leaved. Stipules generally very broad, elhptic and obtuse, thin, .5-1 cm. long. Leaves 

 ternate, very thin, in all specimens seen perfectly glabrous; leaflets broadly obovate, 

 sometimes petiolate, deeply incised-serrate with obtuse teeth, entire toward the base and 

 the lateral ones somewhat oblique. Flowers 1.5-2 cm. in diameter. Hypanthium mi- 

 nutely puberulent, or glabrous, in fruit nearly 1 cm. in diameter; bractlets oval, obtuse 

 or acutish, about equalling the ovate acute sepals. Petals obovate, cuneate, deeply emar- 

 ginate, exceeding the sepals by about one half 



This is near P. gelida and has generally been included therein, but differs in its 

 much larger flowers, lighter foliage and a thicker creeping rootstock ; it is best to regard 

 it as at least a good variety, and if the isolated range is taken into consideration, it is still 

 better to regard it as a species. P. flahellifoUa is found on the higher mountains of Ore- 

 gon and Washington, while P. gelida grows in the Caucasus and eastern Siberia. 



6o. Potentilla Friesiana Lange. 



PotentiUa Friesiana Lange, Consp. Fl. Groenl. 9. 1880. 



Rosenvinge, ibid., 656. 



PotentiUa maculata Fries, ace. to Lange, I. c. 



Illustrations : Fl. Dan. pi. 2965. 



Stems several from a thick rootstock, 1 dm. high or more, ascending or erect, pilose with long 

 hairs. Basal leaves numerous, short-petioled, glutinous, long-pilose especially beneath. Stem leaves 

 1 or 2 ; leaflets broadlj^ obovate, creuately 3-1-toothed at the apex. Cyme several-flowered, crisp-lanate 

 and glandular ; bractlets elliptic, obtuse, half as long as the ovate acute sepals. Petals twice as long 

 as the sepals, broadly emarginate. 



This species must be very nearly related to P. nana and perhaps represents only an overgrown 

 form of that plant. 



Greenland, Disco : *Th. Fries. 



6i. Potentilla fragiformis Willd. 



Potentilla fro [/[form is Willd.; Schlecht. Mag. Ges. Naturf. Fr. Berlin, 7- 294 

 1813.* 



Lehm. :\Ion. 28 and 163 ; Seringe in DC. Prod. 2 : 58G ; Sprengel, Syst. Veg. 2 : 

 540; Don, Card. Diet. 2 : 550 : Dietr. Syn. PL 3: 17S ; Walp. Ann. 2 : 504 ; Lehm. 

 Rev. Pot. 155. 



