or deciduous, monoecious trees. Trunk straight; main branches whorled. Leaves
spirally arranged, scattered or decussate, monomorphic, dimorphic, or
trimorphic on same tree; blades lanceolate, subulate, scalelike or linear.
Microsporophylls and cone scales spirally arranged or decussate. Male cones
borne in panicles or solitary or clustered at branch ends, or axillary, small;
microsporangia with 3 or 4 (-9) pollen sacs; pollen nonsaccate. Female cones
terminal, ripening in 1st year, persistent or late deciduous; cone scales
developing after ovules originate in bract axils; bracts and cone scales
usually spirally aranged or decussate, sessile, opening when ripe (falling
in Taxodium), semiconnate and free only at apex, or completely
united; ovules 2-9 per bract axil, erect or pendulous; cone scales flattened or
shield-shaped, woody or leathery, 2-9-seeded on abaxial side. Seeds flat or
triangular, wingless or narrowly winged all round or on 2 sides, or with a long
wing on proximal part.