BETULACEAE
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publication ID |
https://doi.org/10.5281/zenodo.302862 |
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persistent identifier |
https://treatment.plazi.org/id/1213417E-FFB9-FFBB-CBBE-F5A34EEDC55C |
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treatment provided by |
Plazi |
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scientific name |
BETULACEAE |
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XXXIV. BETULACEAE View in CoL View at ENA 2
Monoecious; deciduous trees or shrubs. Leaves alternate, simple. Stipules caducous. Male flowers 3 in the axil of each bract, in pendent catkins; perianth present. Female flowers 2 or 3 in the axil of each bract, in erect catkins; perianth absent; ovary bilocular; styles 2. Fruit a flattened nutlet, usually winged, borne in a dense, cylindrical or cone-like catkin of scales formed from the accrescent, fused bracts and bracteoles.
Fruiting catkin cylindrical or narrowly ovoid; scales 3-lobed, falling with the fruit; stamens 2, bifid below the anthers 1. Betula Fruiting catkin ovoid, cone-like; scales 5-lobed, woody and persistent; stamens 4, entire (though with shortly forked connective)
2. Alnus
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.