2l6 



22. Potentilla Anserina 



ROSACEAE. 



[Voi,. II- 



23. Potentilla Canadensis L,. 

 (Fig. 1935.) 



Potentilla Canadensis L. Sp. PI. 498. 1753. 



P. Canadensis var. pttmila T. & G. Fl. N. A. i: 4 \ v 1840. 



Potentilla simftle.r Michx. Fl. Bor. Am. i: 303. 1803. 



Herbaceous, tufted, spreading by slender runners, 3'- 

 2 long. Stipules lanceolate, acute, entire or few- 

 toothed; leaves petioled, digitately 5-foliolate (rarely 3- 

 4-foliolate); leaflets oblanceolate or oblong, obtuse at 

 the apex, narrowed at the base, 6"-i' long, incisely ser- 

 rate, at least above; peduncles slender, axillary, i-flow- 

 ered; flower yellow, 3 "-7" broad; petals 5, broadly oval, 

 slightly longer than the acute calyx-lobes and linear- 

 lanceolate bractlcts; stamens about 20; style terminal, 

 filiform; achenes glabrous; receptacle villous. 



In dry soil, Quebec to Georgia, Minnesota and the Indian 

 Territory. Ascends to 6300 ft. in North Carolina. April- 

 Aug. Called also Wild Strawberry. 



Potentilla reptans I,., a European species, collected on 

 ballast at Camdcn, N. J., differs in its more closely creeping 

 habit, smaller leaves, and very broad elliptic bracth is. 



Silver-weed. Wild or Goose-tansy. (Fig. 1934.) 



Potentilla Anserina L,. Sp. PI. 495. 1753. 



Herbaceous, tufted, spreading by slender runners i- 

 3 long. Stipules membranous; leaves petioled, pin- 

 nate, s'-iS' long; leaflets 7-25, oblong, oblanceolate 

 or obovate, obtuse, the lower generally smaller, often 

 with still smaller ones interspersed, all sharply serrate, 

 nearly glabrous above, white and silky-pubescent be- 

 neath; peduncles axillary, solitary, slender, erect, i- 

 flowered, about equalling the leaves; flower yellow, 

 8 // -i2 // broad; petals broadly oval or obovate, entire or 

 emarginate, exceeding the ovate acute calyx-lobes and 

 oval bractlets; stamens about 20; style filiform, lateral;, 

 receptacle villous; achenes glabrous. 



On shores and salt meadows, New Jersey to Greenland,, 

 west to Nebraska, British Columbia and Alaska, south in 

 the Rocky Mountains to New Mexico and to California. 

 Also in Europe and Asia. Goose-grass. May-Sept. 



Potentilla Anserina Egedii (Wormsk.) T. & G. Fl. N. A. i: 



444. 1840. 

 Potentilla Egedii Wormsk. Fl. Dan. pi. 1578. 



Smaller, less pubescent, very slender; leaflets 5-9, deeply 

 im-isecl; peduncles short. Massachusetts to Greenland. 



Five-finger. 



24. Potentilla nemoralis Nestl. Wood 

 Cinquefoil. (Fig. 1936.) 



Tormentilla reptans L,. Sp. PI. 500. 1753. , Not P. 



reptans I,. 

 Potentilla nemoralis Nestl. Mon. Pot. 65. 1816. 



Diffusely branched, trailing or ascending, very 

 slender, somewhat pubescent, 6 / -2 long. Stip- 

 ules small, foliaceous, entire or dentate; leaves 

 petioled, 3-foliolate (rarely 5-foliolate); leaflets 

 oblanceolate or obovate, obtuse at the apex, cune- 

 ate at the base, sharply dentate above; pedun- 

 cles axillary, filiform, usually much exceeding the 

 leaves, i-flowered; flowers 3 // -4 // broad, yellow, 

 generally 4-parted; petals obovate, emarginate, or 

 rounded, exceeding the acute calyx lobes and 

 bractlets; achenes glabrous; receptacle pubescent. 



Labrador (according to Hooker). Common im 

 Europe. Called also Trailing Tormentil. Summer. 



