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Pakistan | Family List | Rosaceae | Potentilla

20. Potentilla argentea L., Sp. Pl. 473. 1753. Hook. f., Fl. Brit. Ind. 2: 356. 1878, Th. Wolf in Bibl. Bot. 71: 256. 1908, Rydberg in N. Amer. Fl. 22 (4): 308. 1908, Juz. in Kom., Fl. USSR 10: 146. 1941, Ball et al. in Tutin et al., Fl. Europ. 2: 41. 1968, Schiman-Czeika in Rech. f., Fl. Iran. 66: 92. 1969, R. R. Stewart, Ann. Catalogue Vasc. Pl. W. Pak. & Kashm. 363. 1972. (Fig. 7, A-F).

Muqarrab Shah


Department of Microbiology, Hazara University, Mansehra, Pakistan

Potentilla argentea
Illustration

  • Fragaria argentea Crantz
  • Hypargyrium argenteum Four.
  • Potentilla argentea var. dentata DC

    Perennial, erect or ascending herbs up to 40 cm tall. Rootstock short, thickened. Stems many, leafy, branched with terminal corymbose many-flowered inflorescence, Basal leaves 5-foliate, upper 3-5 foliate, petioles 3-6 cm long, tomentose. Basal stipules membranous with linear auricles, entire or divided, upper stipules green, oblong-linear to linear-lanceolate, divided. Leaflets obovate-cuneate, irregularly 6-12 lobed with secondary incisions, sessile, upper surface glabrous to subglabrous, green, lower surface dull white argenteo-tomentose, margin flat or a little revolute. Flowers small, 1.2-1.4 cm diam., yellow, pedicels 1-1.5 cm long, tomentose. Calyces subequal, 3.5-4.5 mm long, dull white tomentose with long hairs, outer sepals oblong obtuse, inner ovate acute. Petals 5-6.5 x 4.5-5.5 mm, obovate emarginate. Stamens 20. Carpels many, styles c. 1 mm, shiny, thickened and strongly papillose below, stigma dilated.

    Lectotype: ‘Habitat in Europe ruderatis.’ RCN: 3784, Herb. Burser XVIII(2):3(UPS)(Jarvis l. c. 766. 2007).

    B-7 Swat, Uthrot, ± 8,000 ft, R.R. Stewart & A. Rehman 2526 (BM), B-9 Kashmir, Sonamarg, A.P. Young 1884 (BM), Pir Panjal, no collector’s name 964 (K), Aliabad, ± 8,000 ft, C.B. Clarke 28681 (K), Baltal, August 1922, R.R. Stewart (K).

    Distribution: Afghanistan, Iran, Pakistan (Swat), Kashmir, China (Xinjiang), Mongolia, Russia (Siberia), Turkey, C. Asia, Europe and N. America.

    Potentilla argentea is apomictic and a number of biotypes exist in the European populations of the species. However, the Himalayan form is of one type, uncommon and with much less variation.

    Found between 2000 – 2700 m, not so common.


     

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