Very tall, monoecious trees to about 100 m tall with strongly buttressed trunks. Branches drooping; branchlets terete. Leaves alternate, sessile, green, dimorphic; leaves on lateral branches divergent, 2-ranked, linear; leaves on main branchlets appressed, ovate-oblong, scalelike. Male cones terminal or axillary, solitary, shortly pedunculate; sporophylls in whorls of 6–12, with 2–6 sporangia per sporophyll. Female cones terminal, solitary, pedunculate, ±ovoid, maturing and opening in 1 season; scales 15–30, spirally arranged, valvate, peltate, woody or leathery. Seeds flattened, narrowly 2-winged; 2–7 per scale.
1 species native to west California.