504 FLORA. 



Y. and N. J. Adventive from Europe. Resembles P. Monspeliensis^ differing in 

 its 5-foliolate leaves, and perennial root. 



Potentilla inclinita Vill, a European species, has been collected by J. Fowler in On- 

 tario. It resembles the last, but the leaves are grayish and slightly silky beneath. 



4. Potentilla sulphurea Lam. ROUGH-FRUITED CINQUEFOIL. (I. F. f. 

 1917.) Erect, rather stout, branched above, villous-pubescent, 4-7 dm. high. 

 Stipules ovate-lanceolate, the lower foliaceous and laciniate ; leaves digitately 

 5-7-foliolate, all but the uppermost petioled ; leaflets oblanceolate or oblong- 

 lanceolate, green both sides, sparingly pubescent, deeply toothed, with triangular 

 divergent teeth; flowers light yellow, numerous, about 2 cm. broad; stamens about 

 20; style slender, terminal; carpels rugose. This has been confused with P. recta 

 L., which is also cultivated and sometimes escapes from gardens. The latter has 

 smaller, dark yellow petals. In waste places, Ont., N. Y., Va. and Mich. Ad- 

 ventive from Europe. June-Sept. 



5. Potentilla nivea L. SNOWY CINQUEFOIL. (I. F. f. 1918.) Stems 1-2 dm. 

 high, woody at the base, silky-villous; leaves 3-foliolate (very rarely 5-foliolate), 

 the lower petioled; leaflets oblong or obovate, usually deeply crenate, densely 

 white-pubescent beneath, green and loosely villous above, 2-3 cm. long, the termi- 

 nal one generally cuneate; flowers 1-5, 12-15 mm. broad; sepals silky, lanceo- 

 late, acute, shorter than the broadly obovate emarginate petals, longer than the 

 bractlets; stamens about 20. Lab., Greenland and arctic Am. to Br. Col., south 

 in the Rocky Mts. to Utah and Colo. Also in Europe and Asia. Summer. 



6. Potentilla emarginata Pursh. ARCTIC CINQUEFOIL. (I. F. f. 1919.) 

 Stems villous-pubescent, tufted, about I dm. high. Leaves 3-foliclate; leaflets obo- 

 vate, 4-12 mm. long, coarsely serrate toward the apex with acute teeth, the terminal 

 one of which is generally the largest, villous on both sides; flower solitary, rarely 

 2, 10-14 mm. broad; calyx -lobes ovate, obtuse, pilose, equalling the oblong bractlets, 

 shorter than the obcordate petals; stamens about 20. Lab., Greenland and arctic 

 Am. to Alaska. Also in Siberia and Spitzbergen. Summer. 



7. Potentilla nana Willd. Low CINQUEFOIL. (I. F. f. 1920.) Villous- 

 pubescent; stems 2-5 cm. high, tufted, generally I -flowered. Leaves 3-foliolate; 

 leaflets broadly obovate or orbicular, toothed, the teeth short, rounded, the terminal 

 one often the smallest; petals broadly obcordate, exceeding the ovate acute sepals 

 and the oval obtuse bractlets. Lab., Hudson Bay and arctic Am. to Alaska, and 

 the Canadian Rocky Mountains. Also in Siberia. Summer. 



8. Potentilla Robbinsiana Oakes. ROBBINS' CINQUEFOIL. (I. F. f. 1921.) 

 Depressed, 2-4 cm. high, tufted from a woody base, villous-pubescent. Basal leaves 

 petioled, 3-foliolate, those of the flowering stem sessile, small and 3-lobed; leaflets 

 obovate, villous, 4-8 mm. long, deeply 3-7 -toothed above, cuneate or narrowed at 

 the base, obtuse at the apex; flowers solitary, terminal, 5-6 mm. broad; sepals and 

 bractlets nearly equal, obtuse, slightly shorter than the obcordate petals. White 

 Mountains. Summer. 



9. Potentilla Monspeliensis L. ROUGH CINQUEFOIL. (I. F. f. 1922.) 

 Erect, annual or biennial, hirsutely rough -pubescent, 3-8 dm. high. Leaves 3- 

 foliolate, the lower and basal ones petioled, the upper sessile or nearly so; leaflets 

 obovate, green both sides, obtuse, pubescent with spreading hairs, 35 cm. long: 

 flowers densely cymose and leafy-bracted, about I cm. broad; calyx-lobes ovate, 

 acute, pubescent, slightly longer than the obovate retuse petals; stamens 15-20; 

 style glandular-thickened below. In dry soil, Lab. to S. Car., Alaska, Kans. and 

 Ariz. Also in Mexico and Asia. June-Sept. 



Potentilla Monspeliensis Norv^gica (L.) Rydb., with oblong leaflets and fine pubes- 

 cence, a native of Europe and Western Asia is introduced in the Eastern States. 



10. Potentilla pentandra Engelm. FIVE-STAMENED CINQUEFOIL. (I. F. f. 

 1923.) Similar to the preceding, erect, hirsute, 3-7 dm. high, much branched 

 above. Basal and lower leaves slender-petioled. 3-foliolate, with the lower pair of 

 leaflets parted nearly to the base, so as to appear 5-foliolate; leaflets oblanceolate or 

 oblong, obtuse, incised-dentate, more or less pubescent. 3-5 cm. long; flowers in a 

 more or less flat-topped cyme, pale yellow, less than 5 mm. broad; calyx-lobes 

 orate, acute, much exceeding the small spatulate petals; stamens 5-8; style thick- 

 ened below. Prairies, Manitoba to Kans., Mo. and Ark. June-Sept. 



