254 



ROSACEAE. 



Vol, II. 



II. Potentilla intermedia L. Downy Cinque- 

 foil. Fig. 2237. 



Potentilla intermedia L. Mant. i : 76. 1767. 



Perennial, stem i°-2i° high, usually ascending, 

 leafy and much branched, finely pubescent with long 

 hairs. Leaves green and finely hirsute on both sides, 

 somewhat tomentose beneath, all but the uppermost 

 5-foliolate, the lower long-petioled ; stipules narrow, 

 acute, mostly entire ; leaflets obovate or oblong, the 

 teeth rather obtuse; flowers numerous, cymose, yel- 

 low, leafy-bracted; petals obcordate, equalling the 

 triangular-ovate acute sepals and oblong bractlets ; 

 stamens about 20; style short, not thickened at the 

 base. 



Waste grounds and roadsides, Massachusetts, New 

 York and New Jersey to Michigan. Adventive from 

 Europe. Resembles P. monspeliensis, differing in its 

 5-foliolate leaves, and perennial root. 



Potentilla inclinata Vill., introduced from Europe 

 and established at Kingston, Ontario, and at Buffalo, 

 New York, differs in having leaves grayish-silky beneath 

 with oblanceolate leaflets (P. canescens Bess.). 



12. Potentilla recta L. Rough-fruited 

 Cinquefoil. Fig. 2238. 



Potentilla recta L. Sp. PI. 497. 1753. 



Potentilla sulphurea Lam. Fl. Franc. 3: 114. 1778. 



Potentilla pilosa Willd. Sp. PI. 2: 1109. 1799. 



Erect, rather stout, branched above, villous-pu- 

 bescent, i°-2° high. Stipules ovate-lanceolate, the 

 lower foliaceous and laciniate; leaves digitately 

 S-7-foliolate, all but the uppermost petioled; leaf- 

 lets oblanceolate or oblong-lanceolate, obtuse at the 

 apex, narrowed or cuneate at the base, green both 

 sides, sparingly pubescent with scattered hairs above, 

 more pubescent beneath, incised-dentate, i'-3' long, 

 with divergent teeth ; flowers terminal, cymose, yel- 

 low, numerous, 6"-g" broad; stamens about 20; 

 style slender, terminal; carpels rugose. 



In waste places, Maine to Ontario. New York, Vir- 

 ginia and Michigan. Adventive from Europe. Native 

 also of Asia. June-Sept. 



13. Potentilla maculata Pourret. Nortliern Cinque- 

 foil. Fig. 2239. 



Potentilla maculata Pourr. Act. Toloss. 3: 326. 1788. 

 Potentilla salisbntgensis Haenke in Jacq. Coll. 2: 68. 1788. 



Rootstock prostrate, stems ascending, simple, pubescent, 

 3-8' high. Stipules membranous ; basal leaves slender- 

 petioled, digitately S-foliolate (rarely 3-foliolate) ; leaflets 

 obovate, obtuse at the apex, narrowed or cuneate at the 

 base, glabrous above, pubescent along the margins and on 

 the veins beneath, green both sides, incisely dentate, with 

 rounded or blunt teeth, 6"-9" long; flowers few, terminal, 

 loosely cymose, yellow, 6"-9" broad; pedicels slender; 

 petals obovate, obcordate, cuneate, yellow, orange-spotted 

 at the base, longer than the ovate acutish calyx-lobes; 

 stamens about 20; style filiform, terminal ; achenes glabrous. 



Labrador and Greenland to James Bay. Also in northern and 

 alpine Europe and Asia. Summer. Confused with P. rubens 

 (Crantz) Vill., in our first edition. 



Potentilla Ranunculus Lange, of Greenland and Labrador, 

 differs in having the teeth of the leaflets lanceolate and acute. 



