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36. Oxygraphis Bunge, Verz. Altai Pfl. 46. 1836.
鸦跖花属 ya zhi hua shu
Wang Wencai; Michio Tamura, Michael G. Gilbert
Herbs perennial, stemless, with short rhizomes. Leaves all basal, simple, petiolate, leaf blade undivided, indistinctly 3-lobed, or rarely 3-partite, margin crenate or entire, 3--5-veined. Inflorescence a solitary, scapose, terminal flower, rarely a 2- or 3-flowered monochasium. Flowers bisexual, actinomorphic. Sepals 5--8, enlarged after flowering, green, persistent or rarely deciduous. Petals 5--19, yellow, oblong, shortly clawed, with a small nectary pit above base. Stamens numerous; filaments narrowly linear; anthers ellipsoid or oblong. Carpels numerous, spirally arranged on a convex receptacle; ovule 1 per carpel, erect. Style shorter than ovary; stigmatic surface adaxial. Aggregate fruit broadly ovoid; achenes ± bilaterally compressed, narrowly rhombic or subfusiform, longitudinally 1- or more veined on each side, with a persistent style at apex.
Four species: Bhutan, China, India, Kashmir, Kazakhstan, Mongolia, Nepal, Pakistan, Russia; four species (two endemic) in China.
Oxygraphis is often included within Ranunculus .
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| 1 |
Scapes puberulent apically; sepals papery, deciduous |
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1 O. delavayi |
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Scapes glabrous; sepals leathery or subleathery, persistent. |
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(2) |
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| 2 (1) |
Leaf blade orbicular, reniform, or ovate, base subcordate or truncate, margin crenate |
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2 O. endlicheri |
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Leaf blade ovate, elliptic, or linear, base broadly cuneate or attenuate, margin entire or rarely crenate. |
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(3) |
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| 3 (2) |
Leaf blade ovate, broadly ovate, or elliptic, 0.5--3 × 0.5--3 cm, base broadly cuneate; flowers 1.5--3 cm in diam.; petals 12--19 |
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3 O. glacialis |
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Leaf blade linear, linear-lanceolate, or lanceolate, 0.8--1.5 × 0.2--0.4 cm, base attenuate; flowers ca. 1 cm in diam.; petals 9--11 |
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4 O. tenuifolia |
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Lower Taxa
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