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Genus Libocedrus, the Incense Cedar

EE. Scales of cone 8 to 12; seed wings symmetrical.

Genus THUYA, THE ARBOR VITAES

DD. Cones globular, thick scaled.

E. Seeds many under each scale; cones biennial.

Genus CUPRESSUS, THE CYPRESSES

EE. Seeds 2 under each scale; cones annual.