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4. Syringa Linnaeus, Sp. Pl. 1: 9. 1753.
丁香属 ding xiang shu
Shrubs or small trees, deciduous. Branchlets terete or 4-angled; pith solid; winter buds scaly, terminal buds often absent. Leaves opposite, simple or rarely pinnate, petiolate; leaf blade entire, pinnatisect or occasionally lobed. Inflorescences paniculate, terminal or lateral, generally composed of small cymes. Flowers bisexual, sessile or pedicellate. Calyx campanulate, regularly or irregularly 4-toothed or subtruncate, persistent. Corolla funnelform, salverform, or rotate; lobes 4, spreading or upright, valvate, usually cucullate and beaked at apex. Stamens 2, included or exserted. Ovules 2 in each locule, pendulous. Style filiform, shorter than stamens; stigma 2-cleft. Fruit a loculicidal capsule, slightly compressed. Seeds 2 in each locule, flat, narrowly winged; endosperm present; radicle erect.
About 20 species: Afghanistan, India, Japan, Kashmir, Korea, Nepal, Pakistan, Sikkim; SW Asia, SE Europe; 16 species in China.
Most species of Syringa are cultivated as ornamental plants, a few are medicinal.
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| 1 |
Corolla tube as long as calyx or slightly longer; filament exserted from corolla tube; corolla white or cream colored |
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16 Syringa reticulata |
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Corolla tube 2.5-8 × longer than calyx; anthers wholly or partly included, occasionally exserted. |
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(2) |
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| 2 (1) |
Panicles terminal, or terminal and lateral. |
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(3) |
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Panicles lateral; terminal buds absent. |
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(9) |
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| 3 (2) |
Anthers entirely exserted from corolla tube; flowers white |
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1 Syringa tibetica |
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Anthers wholly or partly included in corolla tube; flowers red, purple, lilac, pink, or sometimes white. |
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(4) |
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| 4 (3) |
Leaf blade abaxially glabrous |
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2 Syringa yunnanensis |
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Leaf blade abaxially ± hairy. |
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(5) |
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| 5 (4) |
Corolla tube funnelform, gradually enlarged above middle; corolla lobes usually upright. |
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(6) |
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Corolla tube subcylindric; corolla lobes spreading, if tube slightly funnelform, then lobes not upright. |
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(7) |
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| 6 (5) |
Panicles nodding to pendulous; fruit ripening reflexed, smooth or sparsely lenticellate |
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3 Syringa komarowii |
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Panicles erect; fruit ripening not reflexed, smooth |
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4 Syringa wolfii |
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| 7 (5) |
Anthers usually inserted below mouth of corolla tube; leaf blade 1.5-4(-8) × 1-3(-5) cm |
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7 Syringa sweginzowii |
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Anthers inserted near mouth of corolla tube or slightly protruding; leaf blade 2.5-11(-18) × 1.5-6(-11) cm. |
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(8) |
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| 8 (7) |
Panicles compact, 5-13 cm; corolla tube subcylindric |
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5 Syringa villosa |
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Panicles loose, 10-25 cm; corolla tube slightly funnelform |
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6 Syringa tomentella |
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| 9 (2) |
Leaves pinnately compound, pinnatisect, or lobed. |
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(10) |
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Leaves all entire. |
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(11) |
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| 10 (9) |
Leaves mostly pinnatisect or lobed, sometimes entire |
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14 Syringa protolaciniata |
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Leaves pinnately compound, with 7-11(-13) leaflets |
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15 Syringa pinnatifolia |
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| 11 (9) |
Leaf blade base with 2 pairs of veins ± palmately arranged |
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9 Syringa meyeri |
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Leaf blade with ± pinnate lateral veins, the 2 lowest pairs of veins not closely adjacent. |
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(12) |
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| 12 (11) |
Leaves as broad as long or slightly broader than long. |
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(13) |
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Leaves usually manifestly longer than broad, sometimes almost as broad as long. |
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(14) |
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| 13 (12) |
Leaves 1-2 cm broad, almost circular |
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12 Syringa wardii |
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Leaves 3-8(-15) cm broad, ovate-orbicular to subreniform |
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13 Syringa oblata |
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| 14 (12) |
Leaf base truncate to broadly cuneate; corolla lobes 5-8(-10) mm |
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13 Syringa oblata |
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Leaf base cuneate to subrounded; corolla lobes 2-5 mm. |
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(15) |
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| 15 (14) |
Anthers purple or purple-black; fruit clearly lenticellate; petiole 5-20 mm (sometimes less than 5 mm) |
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8 Syringa pubescens |
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Anthers yellow; fruit obscurely lenticellate; petiole 2-7 mm. |
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(16) |
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| 16 (15) |
Leaves 2-9 × 2-5 cm, densely villous abaxially |
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10 Syringa mairei |
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Leaves 1.5-2.5(-4) × 0.8-2(-3) cm, glabrous abaxially, except for a pilose midrib and primary veins |
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11 Syringa pinetorum |
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List of lower taxa
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Treatments in Other Floras @ www.efloras.org
Other Databases
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