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4. Tribe CAESALPINIEAE
云实族 yun shi zu
Authors: Dezhao Chen, Prof. Dianxiang Zhang, Ding Hou, Kai Larsen & Supee Saksuwan Larsen
Leaves bipinnate or rarely pinnate. Flowers bisexual or unisexual, actinomorphic or zygomorphic. Receptacle discoid. Sepals (3-)5(or 6), inserted on margin of receptacle, often unequal, lowest larger, on outside, hooded or navicular. Petals usually 5, rarely 4, slightly unequal. Stamens (4-)10(-20), free, subequal; anthers basifixed or dorsifixed, opening by lateral slits. Ovary or ovary stipe inserted at base of receptacle; ovules 2 to numerous, rarely 1.
About 55 genera and 420-450 species: distributed in the tropics and subtropics; 11 genera (four introduced) and 37 species (ten endemic, eight introduced) in China.
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| 1 |
Leaves pinnate; petals absent. |
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13 Ceratonia |
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Leaves usually bipinnate; petals present |
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(2) |
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| 2 (1) |
Plants polygamous or dioecious; deciduous trees |
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(3) |
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Plants hermaphroditic; trees or climbers |
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(4) |
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| 3 (2) |
Plants unarmed; flowers in terminal panicles; legume turgid. |
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14 Gymnocladus |
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Plants often armed with branched spines; flowers in axillary racemes; legume flat. |
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15 Gleditsia |
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| 4 (2) |
Plants unarmed; trees |
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(5) |
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Plants usually armed with prickles; climbers or trees |
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(8) |
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| 5 (4) |
Flowers more than 7 cm in diam., showy. |
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18 Delonix |
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Flowers not more than 3 cm in diam |
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(6) |
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| 6 (5) |
Stamens 5; flowers scarlet; legume narrowly winged along ventral suture. |
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16 Acrocarpus |
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Stamens 10; flowers yellow or yellowish green; legume not as above |
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(7) |
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| 7 (6) |
Legume with broad wings on both sutures; flowers more than 15 mm in diam.; stamens slightly shorter than petals. |
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17 Peltophorum |
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Legume without wings; flowers less than 5 mm in diam.; stamens ca. 2 × as long as petals. |
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23 Erythrophleum |
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| 8 (4) |
Flowers irregular, zygomorphic; ovules 2 or more |
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(9) |
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Flowers subregular; ovules 1 |
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(10) |
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| 9 (8) |
Legume ovate, oblong, or lanceolate, smooth or spiny, leathery or woody; albumen absent. |
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19 Caesalpinia |
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Legume linear, torulose, thinly leathery; seeds with endosperm. |
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22 Parkinsonia |
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| 10 (8) |
Ovary sessile; legume winged, indehiscent. |
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20 Pterolobium |
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Ovary shortly stalked; legume not winged, splitting along middle of valves (cultivated). |
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21 Haematoxylum |
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List of lower taxa
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