Rocky summits and outcrops are sparsely vegetated. Soils are thin, nutrient-poor and well-drained. Conditions are harsh in winter and summer. Yet, vegetation is rich in species diversity. Some plants take root in the rock fissures and depressions where soil and moisture collect. Other plants grow in fine to coarse, well-drained soil deposits where roots dry in winter to avoid rot. Local examples include the rock outcropping across from the Nature Study Museum with Eastern Prickly Pear and Stiff Aster and the summits of Bear Mountain and other peaks.