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37. Halerpestes E. L. Greene, Pittonia. 4: 207. 1900.
碱毛茛属 jian mao gen shu
Wang Wencai; Michio Tamura
Herbs perennial, small, usually with slender creeping stolons. Leaves all basal or at nodes of stolons, leaf blade simple, undivided, dentate or 3-lobed to 3-sect. Scapes naked or with a linear bract. Inflorescence a solitary terminal flower or a 2- or 3-flowered monochasium. Flowers bisexual, actinomorphic. Sepals 5, deciduous. Petals 5--12, yellow, narrowly obovate, shortly clawed at base, with a nectary pit above base. Stamens numerous or few; anthers ellipsoid. Carpels numerous, spirally arranged on a conical receptacle; ovules 1 per carpel. Aggregate fruit globose or ovoid; achenes bilaterally compressed, with 2 or 3 longitudinal thin ribs on each side; style persistent, straight or curved.
About ten species: temperate Asia, North & South America; five species (one endemic) in China.
Halerpestes is sometimes placed within Ranunculus .
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| 1 |
Gynoecium and aggregate fruit ovoid. |
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(2) |
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Gynoecium and aggregate fruit globose. |
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(3) |
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| 2 (1) |
Scape 3--16 cm; leaf blade 0.5--2 cm; petals 5; stamens (6--)14--20 |
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4 H. sarmentosa |
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Scape 6--24 cm; leaf blade 1.2--4.8 cm; petals 6--12; stamens 50--78 |
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5 H. ruthenica |
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| 3 (1) |
Stolons absent; basal leaves ovate, 3-sect, lateral segments unequally 2-sect, ultimate segments linear |
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3 H. filisecta |
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Stolons present; basal leaves 3-lobed to 3-sect, or undivided, if 3-sect then lateral segments usually undivided or sometimes with a short lobule. |
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(4) |
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| 4 (3) |
Basal leaves all or some rhombic, broadly cuneate, or pentagonal, 3-lobed, to 3-sect |
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1 H. tricuspis |
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Basal leaves oblanceolate, oblong, or linear, undivided, margin 3-dentate near apex or entire |
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2 H. lancifolia |
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List of lower taxa
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Treatments in Other Floras @ www.efloras.org
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