imbricate

The first and oldest of these varieties is generally called Scale or Imbricate armour.

Sepals and petals colored alike, in three or more rows of three, imbricate.

Sepals and petals imbricate, each in two rows of three (rarely in twos or fours).

Sporocarps sessile beneath the stem; small, floating, pinnately branched, with minute imbricate leaves.

Antheridia 3–20, in the axils of small saccate leaves, which are scarcely imbricate or crowded into terminal heads.