A fossil cycad.

An extinct genus of tree-sized lycopod plants (family Lycopodiaceae), known from their fossil remains found chiefly in coal measures (cf. lepidode…

a genus of fossil plants common in coal-measures, characterized by the presence on the trunk of leaf-scars; a plant of this genus; also attributive.

Palaeontology. A fossil plant, of a genus or order abundant in the Coal Measures, of which the stems are found in jointed fragments, ribbed and…

A former genus of fossil plants, whose remains are found abundantly in the coal-measures; they consist of branching bodies, covered with regularly…

A fossil containing many pore-like structures, supposed to be that of a polypore.

(a) A seaweed of the group Fucaceæ. (b) A fossil marine plant resembling these.

A genus of fossil mosses originally comprising all fossil mosses found in amber, coal, or other deposits, and now used as a form genus for those…

A genus of gymnospermous fossil plants having seeds borne on long stalks.

(a) adj. pertaining to or resembling plants of the genus Lepidodendron; (b) n. a plant of this genus or of the group of which it is the type.

Originally: a primitive or ancestral gymnosperm. Now: spec. any of a group of sporogenous fossil plants having secondary wood resembling that of…

Any of various extinct gymnosperms belonging to the division Pteridospermatophyta, which originated in the late Devonian period and became…

A class of gymnospermous fossil plants found chiefly in Mesozoic rocks.

any of a group of extinct plants resembling ferns but producing seeds rather than spores; = pteridosperm, n.