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35. Albizia Durazzini, Mag. Tosc. 3(4): 13. 1772.
合欢属 he huan shu
Trees or shrubs, usually unarmed, rarely scandent and with short, recurved hooks. Leaves bipinnate; stipules usually small, rarely larger and caducous; petiole and rachis with glands; leaflets small in numerous pairs or larger in few pairs. Inflorescences of globose heads, arranged in axillary or terminal panicles. Flowers bisexual. Calyx campanulate or funnel-shaped, 5-toothed. Corolla funnel-shaped, upper part 5-lobed. Stamens numerous, connate into a tube at base, free part of filaments long exserted; anthers small. Central flowers of heads with broader calyx and much longer filament tube. Ovary flattened; style long, slender; stigma minute. Legume broadly linear or oblong, straight, plano-compressed, indehiscent, or dehiscent along both sutures, continuous inside. Seeds ovoid or orbicular, compressed, funicle filiform.
Between 120 and 140 species: tropical to warm regions of the world; 16 species (two endemic, two introduced) in China.
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| 1 |
Midvein of leaflets medial or eccentrically close to lower margin |
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(2) |
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Midvein of leaflets eccentrically close to upper margin |
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(7) |
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| 2 (1) |
Shrubs or climbers, with a curved prickle below leaf scar. |
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1 A. corniculata |
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Trees, unarmed |
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(3) |
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| 3 (2) |
Main vein of leaflets slightly eccentrically close to lower margin. |
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2 A. procera |
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Main vein medial |
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(4) |
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| 4 (3) |
Pinnae 1 pair; corolla 8-10 mm; seeds with U-shaped pleurogram. |
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3 A. attopeuensis |
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Pinnae 1-4 pairs; corolla 6-7 mm; seeds with single pleurogram |
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(5) |
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| 5 (4) |
Flowers sessile; pedicel of legume without a joint. |
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4 A. crassiramea |
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Flowers pedicellate; pedicel of legume with a joint |
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(6) |
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| 6 (5) |
Marginal flowers with glabrous calyces; legume indehiscent; seeds narrowly elliptic. |
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5 A. retusa |
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Marginal flowers with puberulent to velutinous calyces; legume dehiscent; seeds orbicular in outline. |
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6 A. lucidior |
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| 7 (1) |
Leaflets (1.5-)1.8-4.5 × 0.7-2 cm |
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(8) |
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Leaflets smaller than 1.8 × 1 cm |
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(12) |
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| 8 (7) |
Flowers sessile; pedicel of legume not jointed. |
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7 A. odoratissima |
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Flowers pedicellate (except central flower); pedicel of legume jointed |
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(9) |
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| 9 (8) |
Both surfaces of leaflets hairy, leaflets 5-14 pairs |
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(10) |
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Both surfaces of leaflets glabrous or abaxially sparsely puberulent |
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(11) |
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| 10 (9) |
Ovary glabrous; leaflets to 4.5 × 2 cm. |
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8 A. kalkora |
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Ovary puberulent; leaflets to 2.5 × 1 cm. |
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9 A. duclouxii |
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| 11 (9) |
Leaflets 4-8 pairs, apically rounded-obtuse or emarginate. |
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10 A. lebbeck |
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Leaflets 13-20 pairs, apically rounded and apiculate. |
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11 A. calcarea |
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| 12 (7) |
Both surfaces of leaflets hairy |
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(13) |
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Leaflets glabrous except at margin |
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(14) |
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| 13 (12) |
Leaflets 8-15 pairs, falcate-oblong, 12-17 mm, apex acute. |
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12 A. mollis |
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Leaflets 10-22 pairs, oblong, 6-10 mm, apex obtuse. |
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13 A. garrettii |
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| 14 (12) |
Corolla 10-12 mm; stamens 3-3.8 cm. |
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14 A. sherriffii |
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Corolla 6.5-8 mm; stamens shorter than 2.5 cm |
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(15) |
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| 15 (14) |
Stipules smaller than leaflets, linear; rachis of inflorescence short and zigzag; stamens pink. |
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15 A. julibrissin |
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Stipules larger than leaflets, half-cordate; rachis of inflorescence long and straight; stamens green-white or yellow. |
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16 A. chinensis |
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List of lower taxa
| Related Links (opens in a new window) |
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Treatments in Other Floras @ www.efloras.org
Other Databases
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