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8. EXOCHORDA Lindley, Gard. Chron. 1858: 925. 1858.
白鹃梅属 bei juan mei shu
Gu Cuizhi (Ku Tsue-chih); Crinan Alexander
Shrubs deciduous. Branches spreading; branchlets angled, glabrous; buds ± ovoid, with several imbricate scales, glabrous or subglabrous, apex obtuse or acute. Leaves petiolate; stipules absent or small and caducous; leaf blade simple, margin entire or serrate. Inflorescence a terminal raceme. Flowers rather large, more than 2 cm in diam. Hypanthium shallowly campanulate. Sepals 5, very short and broad. Petals 5, imbricate, white, oblong to broadly obovate, base attenuate into a claw. Stamens 15–30; filaments borne on margin of large disk, short. Carpels 5, connate; ovary superior, deeply furrowed, 5-loculed; styles free. Fruit a capsule, obconic, 5-angled, dehiscent along both sutures. Seeds 1 or 2, oblate, winged.
About four species: C and E Asia; three species (two endemic) in China.
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| 1 |
Leaf blades serrate above middle. |
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3 E. serratifolia |
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Leaf blades mostly entire, occasionally serrate at apex. |
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(2) |
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| 2 (1) |
Pedicels 3–5 mm; petals with short claws; stamens 15–20; petiole 5–15 mm or nearly absent. |
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1 E. racemosa |
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Pedicels short or nearly absent; petals with long claws; stamens 25–30; petiole 15–25 mm. |
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2 E. giraldii |
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Lower Taxa
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