50 MEMOIRS FEOM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 



22. Potentilla inclinata Yill. 



PotentlUa incUnata Yill. Hist. PI. Dauph. 3 : 567. pi. 4S. 1789. 



Willd. Sp. PL 2 : 1102 ; Poir. in Lam. Enc. Meth. 5 : 591 ; Persoon, Syn. PI. 2: 54 ; Haller, 

 Syn. Pot. 55 ; Walp. Ann. 2 : 492 : Ledeb. Fl. Ross. 2 : 47 ; Lehm. Rev. Pot. 100.' 



Eydb. Bull. Torr. Bot. Club, 24 : 9. 



Potentilla cmieseem Besser, Pr. Fl. Gall. 1 : 330. 1809.* 



Ser. in DC. Prod. 2 : 578 ; Spreng. Syst. 2 : 537 ; Lehm. Mon. 47 ; ISTestler, Monog. 47. 



Potentilla pilosa Macoun, Cat. Can. PI. 139 and 517. 1883-6. Not DC. 



Illustrations : Sturm, Deutschl. F]. 91 : pi. 8;'^ Yill. Hist. PI. Dauph. 3 : pi. Jf5. 



Stem rather simple, erect, or seldom decumbent at the base, leafy, more or less gi-ayish-tomentu- 

 lose and sparingly hirsute, branched above with rather erect branches. Stipules lanceolate, entire. 

 Leaves, except the uppermost, quinate, silky-hirsute on both sides and grayish-tomentulose beneath. 

 Leaflets oblanceolate, deej)!}' toothed with oblong, rather acute teeth. Hypanthium hirsute, and tomentu- 

 lose, in fruit 7-10 mm. broad. Bractlets lanceolate, acute, equalling the ovate-lanceolate acute sepals. 

 Petals obovate, slightly emarginate, equalling the calyx. 



This closely resembles the preceding species, but differs in a more slender and simple stem and the 

 grayish pubescence. The only specimens found on this continent that I have seen are those col- 

 lected in Ontario by J. Fowler 1886 and 1895. 



23. Potentilla collina Wibel. 



Potentilla collina Wibel, Prim. Fl. Werth. 2 : 267. 1799. 



Lehm. Mon. 24 and 99 ; DC. Prod. 2 : 577 ; Sprengel, Syst. ^"eg. 2 : 537 ; Don, Gard. Diet. 2 : 

 554 ; Dietr. Syn. PI. 3 : 182 ; Walp. Ann. 2 : 492 ; Lehm. Rev. Pot. 98 \ 



Rydb. Bull. Torr. Bot. Club, 24 : 9 ; Britt. & Brown, HI. Fl. 2 : 209. 



Stems many from the rootstock, spreading or ascending, weak, glabrous or tomentose. Stipules 

 smaU, less than 5 mm. long, lanceolate, acuminate. Basal leaves many, on long petioles l-lj dm. long, 

 digitate with 5 leaflets, smooth or puberulent above, grayish-tomentose beneath. Leaflets broadly 

 cuneate, 15-25 mm. long, deeply toothed above the middle with oblong-ovate obtuse teeth, and with 

 flat, not revolute margins. The upper stem leaves are ternate with oblong few-toothed leaflets. 

 Hypanthium grayish-tomentose, in fruit 5-7 mm. broad. Bractlets and sepals subequal, oblong, ob- 

 tuse or acute. Petals obcordate, cuneate, emarginate, a little exceeding the calyx. 



This is another species that has been collected in this country at least tmce, viz., by J. M. Holz- 

 inger (Js^o. 30) at Winona, Minn., in 1887, and by M. L. Fernald in Massachusetts, 1894.- It differs 

 from P argmUea, which it most closely resembles, by its prostrate or spreading habit, less white- 

 tomentose leaves, which have broader lobes, and flat, not revolute margins. 



•The numeroi-s synonyms of this species are omitted as they have no reference to North American botany. See Leh- 

 mann, I. c. 



^The synonyms and most references are omitted, as they have no bearing upon North American botany. 



