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FOC | Family List | FOC Vol. 9 | Rosaceae

35. POTENTILLA Linnaeus, Sp. Pl. 1: 495. 1753.

委陵菜属 wei ling cai shu

Li Chaoluan (Li Chao-luang); Hiroshi Ikeda, Hideaki Ohba

Potentilla fruticosa

Credit: Harvard University Herbaria

Herbs perennial, rarely biennial, annual, or shrubs, if perennial then with ± tufted, scaly rootstock. Stems erect, ascending, or prostrate. Leaves pinnate or palmately compound; stipules ± adnate to petiole. Inflorescence often cymose or cymose-paniculate, or 1-flowered. Flowers usually bisexual. Hypanthium concave, mostly hemispheric. Sepals 5, valvate; epicalyx segments 5, alternating with sepals. Petals 5, often yellow, rarely white or purple. Stamens usually ca. 20 in 3 series of 10, 5, and 5, rarely fewer or more (11–30); anthers 2-loculed. Carpels usually numerous, free, inserted on slightly elevated receptacle; ovule ascending or pendulous, anatropous, amphitropous, or suborthotropous; style subterminal, lateral, or basal. Achenes numerous, inserted on dry receptacle with persistent sepals. Seed testa membranous. x = 7.

About 500 species: mostly in temperate, arctic, and alpine zones of the N hemisphere, a few in the S hemisphere; 86 species (22 endemic) in China.

1 Herbs perennial, biennial, or annual; style subterminal, not evenly thickened throughout length; ovary glabrous.   (2)
+ Shrublets or perennial herbs; style basal, lateral, or subterminal, clavate, filiform, slender, or fusiform; ovary hairy or glabrous.   (3)
2 (1) Style conic, thickened at base, gradually attenuate distally.   5 P. sect. Conostylae
+ Style clavate, thickened at apex, thin proximally.   6 P. sect. Potentilla
3 (1) Shrublets or woody-based perennial herbs; style clavate or filiform; ovary densely hairy, rarely glabrous.   (4)
+ Herbs perennial; style slender or fusiform; ovary glabrous, very rarely hairy.   (5)
4 (3) Style basal or lateral, clavate, thickened at apex, thin proximally; ovary densely hairy or only sparsely so at apex or hilum.   1 P. sect. Rhopalostylae
+ Style basal, lateral, or subterminal, filiform, evenly thickened throughout length; ovary densely villous, very rarely glabrous.   2 P. sect. Nematostylae
5 (3) Auricles of stipules of radical leaves borne on adaxial side of petiole; flowering stems arising from axils of radical leaves.   4 P. sect. Leptostylae
+ Auricles of stipules of radical leaves borne on lateral side of petiole; flowering stem developing as distal part of main stem.   3 P. sect. Closterostylae

  • List of lower taxa


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