Northern Prairie Wildlife Research Center
Northeast Wetland Flora
Field Office Guide to Plant Species
Quercus imbricaria Michx.
- Family: Beech (Fagaceae)
- Flowering: April-May
- Field Marks: This oak differs from all others that have unlobed and untoothed leaves by its
wide, densely hairy undersurface of the leaves with star-shaped hairs and by its smooth or nearly smooth twigs.
- Habitat: Bottomlands, rich woods.
- Habit: Medium tree up to 70 feet tall, with a trunk diameter up to 3 feet across; crown rounded or oblong, with many branches; bark dark brown, deeply furrowed between flat, tight plates.
- Twigs: Slender, smooth, reddish brown; leaf scars alternate but crowded near the tip of the twigs, half-round, slightly elevated, with several bundle traces; buds ovoid, pointed at the tip, brown, smooth, up to 1/8 inch long.
- Leaves: Alternate, simple, lanceolate to oblong, with a bristle tip, tapering to the base, without lobes or teeth, up to 6 inches long, up to 2 inches wide, dark green, smooth, and shiny on the upper surface, paler and hairy with star-shaped hairs on the lower surface; leaf stalks up to 1/2 inch long, hairy.
- Flowers: Male and female borne separately but on the same plant, appearing as the leaves begin to unfold, minute, the male in slender, yellow, drooping spikes, the female few in a cluster.
- Sepals: 0.
- Petals: 0.
- Stamens: 1.
- Pistils: Ovary inferior.
- Fruits: Acorns solitary or 2 together, stalked, the nut nearly spherical, dark brown, less than half enclosed by the cup, the cup reddish brown and slightly hairy.
- Notes: The wood is used for shingles and in general construction.
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