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©John Hagstrom

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Hagstrom, John

Quercus rubra L. (northern red oak), flowers

digital color photograph 
Digitization Status
Born digital
Photographic image
Date created
2005 – 2012
Quercus rubra L. (northern red oak), flowers typical of the genus quercus in all species.
Monoecious, appearing on old or new growth; staminate catkins pendent, clustered; individual flowers comprising a 4- to 7-lobed calyx which encloses 6 stamens, (rarely 6-12); pistillate flowers solitary or in few to many-flowered spikes from the axils of the new leaves; individual flowers consisting of a 6-lobed calyx surrounding a 3-celled ovary (rarely 4-5), the whole partly enclosed in an involucre.