POTENTILLA 



POTENTILLA 



2775 



green. Widespread in Eu. Intro, as a weed in E. N. 

 Amer. 



23. lacinifisa, Waldst. & Kit. (P. ladniata, Amer. 

 Hort.). St. stout, erect, forming clumps, 12-20 in. high, 

 mostly reddish, laxly corymbose above, long-pilose 

 with soft spreading hairs: basal Ivs. palmately 7-f olio- 

 late, rarely 5-foliolate; Ifts. green and pilose on both 

 surfaces, not rugose, the terminal folded, ah 1 oblanceo- 

 late-oblong, 2-3 in. long, laciniate-pinnatifid, with 6-12 

 pairs of lanceolate or linear and incised teeth: fls. and 



feneral habit as in P. recta, to which it is closely related. 

 .Eu. 



24. grandiflora, Linn. Sts. ascending or erect, from 

 a thick caudex, 415 in. high, the erect branches of the 

 cyme few-fld., densely villous above, eglandular: basal 

 Ivs. long-petioled, mostly ternate; Ifts. 7-15 lines long, 

 lateral obliquely obovate, terminal cuneate-obovate, 

 ah 1 incised-serrate toward the apex with 6-10 ovate or 

 oblong acutish teeth, pubescent above, densely short- 

 villous beneath, veiny, rarely whitened: fls. conspicuous, 

 9-15 lines broad; petals broadly obcordate, emarginate, 

 much exceeding the sepals, golden yellow; carpels 

 glabrous, smooth or obsoletely rugose; style papillose- 

 thickened at the base. July, Aug. Alps. A good bor- 

 der plant. 



25. pyrenaica, Ram. St. stout, arcuate-ascending 

 from a thick subcespitose caudex, 4-10 in. long, 

 racemosely few-fld. above, pilose or somewhat can- 

 escent: basal Ivs. both short- and long-petioled, pal- 

 mately 5-foliolate; Ifts. small, sessile, cuneate-obovate 

 or cuneate-oblong-obovate, 4-9 lines long, the outer 

 smaller, all entire below, dentate toward apex with 

 5-7 pairs of short acutish or obtuse teeth, green and 

 subglabrous above, densely pilose and subsericeous 

 beneath: fls. 1 in. broad; petals large, broadly obovate, 

 emarginate, much longer than the sepals, golden yel- 

 low; carpels glabrous, stria te-rugulose; style thickened 

 below. July, Aug. Pyrenees. Closely related to P 

 grandiflora. 



Subsection C. GOMPHOSTYI^E. Style subterminal, rardy 

 lateral, clavate: plant with no true tomentum. 



26. dubia, Zimm. Cespitose, forming mats, runners 

 wanting: sts. slender, prostrate or ascending, %-2 in. 

 long, scarcely as long as the Ivs., 1-fld., rarely 2-3-fld., 

 pilose, eglandular: basal Ivs. short-petioled, ternate; 

 Ifts. small, 4-5 lines long, broadly obovate, the outer 

 strongly oblique, the terminal slightly petioled, all with 

 2-3 pairs of ovate, acute, or obtuse teeth, light green 

 and glabrous above, strigose on the veins beneath: fls. 

 small, 3-6 lines broad; appendages broad, obtuse or 

 rounded; petals broadly obovate, slightly emarginate, 

 exceeding the sepals, yellow; carpels glabrous, smooth 

 or rugulose; style somewhat thickened below. July, 

 Aug. Mountains of Eu. G. 36:483. The smallest of 

 European potentillas. 



27. alpestris, Hall. f. Caudex densely clothed with 

 stipules; runners almost wanting: sts. slender, arcuate- 

 ascending, rarely strict, few-lvd., 2-8 in. long, somewhat 

 exceeding the basal Ivs., laxly dichotomous-ramose at 

 top, pilose above, rarely glandular: basal Ivs. short- 

 petioled, appendages 5-foliolate, rarely 3- or 7-foliolate; 

 Ifts. mostly sessile, obovate, crenate-dentate or deeply 

 incised-serrate with 2-5 pairs of obtuse teeth, strigose 

 or glabrous above, pilose or villous on the veins beneath, 

 green both sides: fls. long-pedicelled, ^-1 in. broad; 

 petals broadly obovate, emarginate, more or less exceed- 

 ing the sepals, golden yellow, rarely paler, often with 

 an orange spot at the base; carpels glabrous, rugulose 

 or smoothish; style subterminal, clavate. June Sept. 

 Arctic and Alpine Amer., Eu., and Asia. A close rela- 

 tive of P. verna but not forming such extended mats. 

 Extremely variable. 



28. verna, Linn. Caudex emitting runners, forming 

 a thick turf: sts. numerous, decumbent or ascending, 



176 



2-6 (rarely 12) in. long, dichotomously branched and 

 laxly corymbose, pilose, rarely glandular, usually 

 reddish: basal Ivs. long-petioled, palmately 5-foliolate, 

 rarely 7-foliolate; Ifts. sessile or nearly so, cuneate- 

 obovate, H-1H m - Ipng, toward the apex crenate- 

 dentate to deeply incised-serrate, sparsely pilose and 

 green above, green and pilose beneath : fls. long-slender- 

 pedicelled ; appendages oblong, obtuse ; petals obovate to 

 broadly obcordate, emarginate, longer than the sepals, 

 golden yellow, rarely paler; carpels glabrous, rugose; 

 style subterminal, clavate. March-May, often also 

 Aug., Sept. Eu. Very variable. Dry or stony soil. 

 For banks and rockeries. 



29. cinerea, Chaix. Forming mats: sts. slender, 

 ascending, 2-4 in. high, scarcely exceeding the basal 

 Ivs., few-fld.; basal Ivs. palmately 5-foliolate, rarely 

 3-4-foliolate; Ifts. narrowly cuneate-oblong-obovate or 

 nearly oblong, rounded at apex, short-crenate-dentate, 

 thick, rugose, sparingly stellate-tomentose above, 

 densely so beneath, long-hirsute on both faces; appen- 

 dages dilated and often bifid, scarcely shorter than 

 the ovate, obtuse sepals; petals oblong-obovate, pale 

 yellow, much exceeding the sepals; carpels glabrous, 

 rugose; style subterminal, clavate. April-June. Alps. 



3158. Potentilla Anserina, showing a plant in 

 early summer before the runners start. Later the 

 flowers are borne on the runners. 



30. canadensis, Linn. Sts. slender, at first ascend- 

 ing, later prostrate and creeping, simple, flagelliform, 

 12-24 in. or more long, leafy, bearing solitary long- 

 peduncled fls. at the nodes, villous, eglandular: basal 

 and cauline Ivs. slender-petioled, palmately 5-foliolate; 

 Ifts. cuneate-obovate or oblong, coarsely dentate-serrate 

 except at the base, green both sides, pubescent or gla- 

 brate above, more or less strigose-pilose beneath : fls. 5-6 

 lines broad; appendages narrowly lanceolate; petals 

 broadly obovate, slightly emarginate, yellow, longer 

 than the sepals; carpels glabrous; style subterminal, 

 from clavate to fusiform. May-Aug. E. N. Amer. Mn. 

 3:38. Good for dry, sterile, open soil. 



Subsection D. LEPTOSTYI^E. Style lateral, short-fili- 

 form, of equal diam. throughout: plant with or 

 without tomentum. 



31. Anserina, Linn. SILVER- WEED. Fig. 3158. 

 Caudex thick; sts. simple, slender, prostrate and creep- 

 ing, rooting at the nodes, often 2K or 3 ft. long, bearing 

 solitary, long-peduncled fls. at the nodes, pilose-sericeous 

 with ascending or somewhat spreading hairs: basal Ivs. 

 numerous, large, pinnate, mostly short-pedicelled ; Ifts. 

 many pairs, decreasing in size downward, with minute 

 ones interspersed, linear-oblong to oblong-ovate, ^-1 l /i 

 in. long, sharply serrate, green or whitened above, 

 densely white to lustrous silky-tomentose beneath, 

 very rarely green both sides: fls. large, 8-10 lines broad; 



