Corylus cornuta californica
Although usually grown for their edible nuts (see Hazelnut), they make very attractive ornamental shrubs or small trees. The plants have separate female and male flowers. Female blossoms are inconspicuous; male ones are showy, appearing in pendent catkins on bare branches in winter or early spring. Leaves are roundish to oval, with toothed margins. Thin branches as needed in late winter; remove suckers when you see them.Corylus cornuta californica
Native to damp slopes below 7,000-ft. elevation, northern Coast Ranges and Sierra Nevada of California, north to British Columbia. Open, multistemmed, to 5–12 ft. high and wide. Roundish, somewhat hairy, coarsely toothed, 1 1/2–3-in. leaves turn bright yellow in autumn. Small nuts with flavorful kernels are enveloped in a leafy husk with a long, attenuated beak.
Native to mountains of Europe. Forms a foliage mat to 3 in. high and 3 ft. or more wide, with dark gre...
Native from central Sierra Nevada to British Columbia. Grows to 1–3 ft. tall and wide. Ovate to ...
From China. Loose, spikelike clusters of 1 1/2–2-in. white flowers open from a profusion of buds...