Edited sentence: The McDonald's rock cress is both state-listed (1979) and federally listed (1978) as endangered.There are several rare wildflowers that are adapted to serpentine soils of the Marble Mountain Wilderness and surrounding area.These include crested cinquefoil or crested potentilla (Potentilla cristae),  Siskiyou fireweed (Epilobium siskiyouens), and McDonald's rock cress (Arabis blepharophylla var.macdonaldiana, and Arabis serpentinicola), a perennial found in conifer forests of California and Oregon