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Trees. Leaves opposite, 1-pinnate (in ours). Domatia 0. Inflorescences composed of dense, terminal or lateral, clusters or panicles. Flowers bisexual or unisexual. Calyx 4-lobed or 0. Petals 4, free or ± connate, or 0. Stamens usually 2. Stigmas 2. Fruit a flattened, 1-2-seeded samara, with an elongate, apical wing. Derivation of name: the classical name for ash. Worldwide: 65 species, mainly northern temperate zones, a few extending to the tropics Zimbabwe: 4 cultivated taxa. |
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Species | Content |
americana L. | |
pennsylvanica Marshall | |
sp. cf. americana | Image |
velutina Torr. |
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