The hornbeams are handsome, hardy trees of medium to large size suitable for all soils. Their hop-like seed clusters are unusual and attractive. The common hornbeam is Carpinus betulus, a British and European native tree often with a rounded picturesque head and grey fluted trunk. The foliage, superficially resembling that of the beech, is markedly ribbed and toothed, turning yellow in autumn. The following forms, which are of architectural interest, are particularly useful in gardens. Columnaris is a slow-growing, dense-habited, small tree of narrow upright growth. Although quite narrow when young,fastigiata (pyramidalis) matures to a medium-sized tree of broadly pyramidal, almost onion-like shape.