Oak trees have distinctive acorns and leaves. Both of Britains' native oaks, the common and the sessile, are characterised by lobed leaves and by clustering of buds at the end of each twig. The common oak differs from the sessile in having leaves with only short stalks or none at all, and lobes on either side of the base of the leaf, while sessile oak leaves have long stalks and lack basal lobes. In contrast, the acorns and female flowers of the common oak have long stalks while the acorns of the sessile oak have none. However, hybrids between the two species occur with intermediate features.