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| 1 |
All leaves ternate. |
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1 Potentilla rigida |
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Leaves 5-11 foliolate. |
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(2) |
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| 2 (1) |
All leaves 5 foliolate, stipules oblong-ovate, acuminate, leaflets not revolute, ± glabrescent to glabrous beneath, flowers large, 2.5-3.0 cm. diam, outer sepals 1.2-1.4 x 0.4-0.5 cm., longer than the inner sepals. |
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2 Potentilla arbuscula |
| + |
Leaves generally 7-11 foliolate together with some 5 foliolate leaves, stipules ovate-obtuse, leaflets revolute, densely hairy beneath, flowers small, 1.4-1.7 cm. diam, outer sepals 0.3-0.5 x 0.1-0.2 cm., much shorter than the inner sepals |
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(3) |
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| 3 (2) |
Low growing prostrate shrubs, leaflets 0.4-0.6 x 0.2-0.3 cm., ovate-elliptic, sparsely silky-pubescent beneath, flowers mostly lateral, outer calyces sparsely sericeous. |
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3 Potentilla dryadanthoides |
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Tall erect shrubs, leaflets 0.6-0.8 x 0.1-0.2 cm., narrowly oblong-elliptic to linear-oblong, densely tomentose with long soft white hairs beneath, flowers mostly terminal, outer sepals densely white tomentose and with long soft white hairs. |
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4 Potentilla ochreata |
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