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9. Gymnospermium Spach, Hist. Nat. Vég. Phan. 8: 66. 1839.
牡丹草属 mu dan cao shu
Authors: Junsheng Ying, David E. Boufford & Anthony R. Brach
Herbs, perennial, glabrous. Tuber subglobose or irregular; stem erect, herbaceous, branchless. Stem with 1 terminal leaf, bi- or triternate, rarely trifoliolate; leaflets thinly herbaceous, slightly pruinose. Inflorescence simple, racemose, terminal. Pedicel with bract at base. Flowers yellow. Sepals 6, petaloid. Petals 6, nectary-like, much shorter than sepals. Stamens distinct, opposite petals and equal in number; anthers dehiscing by 2 apical flaps. Pistil simple; ovary 1-loculed; ovules 2-4; placentation basal; style short or slender; stigma truncate. Capsule less than 8 mm in diam., valved. Seeds 2-4; aril whitish. x = 8.
Six to eight species: north temperate zone; three species (one endemic) in China.
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| 1 |
Leaves bipinnate or tripinnate; inflorescence 13-16-flowered; pedicel 3-4 cm; sepals 7-10 mm. |
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1 G. kiangnanense |
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Leaves trifoliolate; inflorescence 5-10-flowered; pedicel 1-2.5 cm; sepals 5-8 mm |
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(2) |
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| 2 (1) |
Leaflets 3-divided; ovules 2 or 3; pedicel 2-2.5 cm. |
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2 G. microrrhynchum |
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Leaflets palmately 5-divided; ovules 4; pedicel ca. 1 cm. |
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3 G. altaicum |
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Lower Taxa
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