|C. lawsoniana, syn. Cupressus lawsoniana, a narrowly columnar, coniferous tree that has spreading branches leading to sprayed foliage that is somewhat scaly. Female cones are wrinkled, reddish brown and sometimes glaucous. Male cones are a bluish black in bud. The buds and cones are small. This plant enjoys low humidity and cooler weather. A root rot caused by Phytophthora lateralis can devastate the tree, but otherwise it is not troubled by disease. Native from southwestern Oregon, to northern California. It is an elegant specimen tree, with many cultivars available.