| Noun | 1. | genus Fothergilla - small genus of deciduous shrubs of the southeastern United States plant genus - a genus of plants family Hamamelidaceae, Hamamelidaceae, witch-hazel family - comprises genera Hamamelis, Corylopsis, Fothergilla, Liquidambar, Parrotia, and other small genera fothergilla, witch alder - any of several deciduous low-growing shrubs of the genus Fothergilla having showy brushlike spikes of white flowers in spring and fiery red and orange autumn color; grows from Alabama to the Allegheny Mountains |