|hazelnut (Corylus spp.)||
hazelnut (Corylus spp.; BIRCH FAMILY [Betulaceae]) Deciduous shrubs with simple, doubly-toothed, deciduous leaves. Staminate catkins start to develop in the fall, but shed their pollen the following spring. Fruit is a nut surrounded by conspicuous leafy bracts. Two species are common in Wisconsin: common hazelnut occurs on dry soils, and beaked hazelnut on moist but well-drained sites. 
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