This preserve supports an unusual number of habitats and plant communities, including streamsides, mossy rocks, cliff crevices, seasonally wet grassland, Oregon white oak woodland, and exposed rock outcrops.  The 314-acre site also protects four state Sensitive plant species, including common blue-cup, nuttall's quilwort, California sword fern, and small flowered trillium.  The grassland community is delicately perched on massive rocky bald hillsides dotted with oak trees.  Wildflowers are abundant in the spring, including camas lilies, blue-eyed grass, Puget balsamroot (a sunflower-like plant), yellow and blue violets, chocolate lilies, harvest brodiea, dwarf monkey-flower, farewell to spring, Nuttall's larkspur, blue-eyed Mary, and others.  (Thurston County)