sentences:  The park has a good gall diversity, such as knopper on acorns, tongue on alders, robin's pincushion or rose bedeguar gall on wild rose, cola nut on oak and witch's broom on birch.The 'Old Wood' containing the ice house has a good plant diversity due to the fact that it is long established and relatively undisturbed, unlike the park's plantations which are of a comparatively recent origin.Chapelholms wood shows a similar high biodiversity.