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5. Dipelta Maximowicz, Bull. Acad. Imp. Sci. Saint-Pétersbourg. 24: 50. 1877.
双盾木属 shuang dun mu shu
Shrubs, erect, deciduous. Winter buds with several pairs of scales. Leaves opposite, estipulate, shortly petiolate, slightly pubescent on veins and margin, margin entire or dentate at apex. Inflorescences of single flowers, paniculate; ovaries with 4 bracts at base; bracts unequal in size, larger 2 tightly adnate to ovary. Sepals 5, linear to lanceolate, ± fused at base. Corolla bilabiate, distinctly narrowed and gibbous at base; upper lip 2-lobed; lower lip 3-lobed. Stamens 4, didynamous, partially adnate to corolla tube, included. Ovary 4-locular, 2 locules with 2 series of sterile ovules, 2 locules each with a single fertile ovule; style slightly shorter than corolla. Fruit an achene with 2 accrescent, membranous, winglike bracts at base, crowned with persistent calyx.
● Three species: China.
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Sepals fused into a tube for at least 2/3 of their length; style villous. |
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3 D. elegans |
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Sepals fused for less than 1/2 their length; style glabrous to sparsely hairy |
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(2) |
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| 2 (1) |
Narrow part of corolla tube exserted from sepals; accrescent bracts often peltate, obscuring sepals at anthesis, calyx divided to base. |
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1 D. floribunda |
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Narrow part of corolla tube not exserted from sepals; accrescent bracts reniform, not obscuring sepals at anthesis, calyx divided 1/2-2/3. |
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2 D. yunnanensis |
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Lower Taxa
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