90 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 



71. Potentilla Vah liana Lehm. 



Fotcntilht Vahlviua Lehm. Mon. Pot. 29 and 172. 1820. 



Hornem. Nomencl. Fl. Dan. Emend. 66 and 118; Sprengel, Syst. Veg. 2: 541; 

 Don, (Jard. Diet. 2: 551; Walp. Ann. 2: 507; Lehm. Rev. Pot. 170. 



Eat. Man. Ed. 7: 456; Eat. & Wr. N. Am. Bot. 372; Rydb. Bull. Torr. Bot. Club, 

 03 • 303 



Lehm. in Hook. Fl. Bor. Am. 1: 194; Seemann, Bot. Herald, 51; Lange, Consp. 

 Fl. Groenl. S and 235; Rosenvinge, ibid. 655; Nathorst. Oefv. Kong. Vet. Ak. Forh. 23- 

 34; Holm, Proc. Acad. Phil. 1895: 544. 



Potentilla Idrsutn Hornem. Dansk. Oecom. PL Ed. 2 : 500.=--= 



Hornem. Fl. Dan. 8: jjL 1390; Vahl in DC. Prod. 2: 573. 



I'otcnfiUa Janifsoiiiana Greville, Mem. Wern. Soc. 3: 417. 1821. 



DC. Prod. 2: 586; Sprengel, Syst. A'eg. 2: 542. 



Putcidillu nirca ViihlkiiKi Seemann, Bot. Herald, 29; Macoun, Cat. Can. PI. 139, in 

 part. 



Potentilla nivea hirsuta Durand, Proc. Acad. Phil. 1863: 94. 1863. 



Potentilhi pulchelht Meehan, Proc. Acad. Phil. 1893: 210. 1893. 



Potentilla nirca ,'i R. Br. in App. Parry's lst^■oy. 277, 1824 (in part); Hook. Parry's 

 2d ^^oy. App. 15 (in part). 



Potentilla nivea r Torr. & Gray, Fl. N. Am. 1 : 441, in part. 



Illxtstratioxs : Fl. Dan. 8: pZ. 1390; Grev. Mem. Wern. Soc. 3: pi 20. Plate 

 35, f. S; dissection of flower, /. 9; pistil,/. 10; stamen,/. 11; fruiting hypanthium and 

 calyx, / 12. 



Densely cespitose, the stout woody much branched, caudex covered with the brown 

 scarious stipules and remains of old leaves. Flowering stems nearly leafless, 1-2- 

 flowered, about 5 cm. high, densely covered with yellowish hairs. Leaves crowded, 

 short-petioled, ternate, silky above, slightly tomentose and rather densely yellowish-vil- 

 lous beneath; leaflets generally less than 1 cm. long, cuneate and coarsely dentate at 

 the apex. Flowers about 15-20 mm. in diameter. Hypanthium yellowish silky-villous, 

 about 1 cm. in fruit ; bractlets and sepals broadly ovate or elhptic, often obtuse, sub- 

 equal. Petals nearly orange, broadly obcordate, overlapping each other and often 

 broader than long, nearly twice as long as the sepals. 



This is very low and matted, the large flowers a little exceeding the leaves. The 

 petals are very broadly obreniform, i. e., br(jader than long, and therefore overlap each 

 other ; the bi-actlets are broadly oval, obtuse and about equal the ovate sepals. The 



