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2. Potentilla sect. Nematostylae (Th. Wolf) Gusuleac in Savulescu, Fl. Reipubl. Popularis Roman. 4: 602. 1956.
线状花柱组 xian zhuang hua zhu zu
Potentilla subsect. Nematostylae Th. Wolf, Biblioth. Bot. 16(Heft 71): 45. 1908.
Subshrubs or perennial, woody-based herbs. Basal leaves pinnate, palmate, or 3-foliolate; leaflets entire, serrate, or divided at margin. Ovary densely villous, very rarely glabrous; style sub-basal, lateral, or subterminal, filiform, evenly thickened throughout its length.
About 50 species: mainly temperate and subarctic regions of N hemisphere; five species (one endemic) in China.
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| 1 |
Leaflet margin entire; style subterminal. |
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(2) |
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Leaflet margin or apex serrate or lobed; style sub-basal, lateral, or subterminal. |
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(3) |
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| 2 (1) |
Leaf blade pinnately or subpalmately 5–7-foliolate, leaflets not articulate at base. |
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9 P. biflora |
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Leaf blade 3-foliolate, leaflets articulate at base. |
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10 P. articulata |
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| 3 (1) |
Leaflets 3-serrate at apex; style lateral or sub-basal. |
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6 P. cuneata |
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Leaflets many serrate or distally 5–7-dentate or 2–5-parted at margin; style subterminal. |
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(4) |
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| 4 (3) |
Flowering stems ascending, rarely erect; rhizome elongate; leaflets distally 5–7-dentate or 2–5-parted at margin. |
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7 P. eriocarpa |
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Flowering stems usually erect; rhizome short; leaflets many serrate at margin. |
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8 P. ancistrifolia |
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Lower Taxa
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