Lycopsida

n.

1.

The class including club mosses and related forms: includes Lycopodiales; Isoetales; Selaginellales; and extinct Lepidodendrales; sometimes considered a subdivision of Tracheophyta.

Thesaurus

Noun

1.

Lycopsida - club mosses and related forms: includes Lycopodiales; Isoetales; Selaginellales; and extinct Lepidodendrales; sometimes considered a subdivision of Tracheophyta class Lycopodiate, class Lycopsida, Lycopodiate class - (biology) a taxonomic group containing one or more orders division Pteridophyta, Pteridophyta - containing all the vascular plants that do not bear seeds: ferns, horsetails, club mosses, and whisk ferns; in some classifications considered a subdivision of Tracheophyta class Lycopodineae, Lycopodineae - alternative designation for the class Lycopsida club moss, club-moss, lycopod - primitive evergreen moss-like plant with spores in club-shaped strobiles Lepidodendrales, order Lepidodendrales - fossil arborescent plants arising during the early Devonian and conspicuous throughout the Carboniferous Lycopodiales, order Lycopodiales - lower vascular plants coextensive with the family Lycopodiaceae; in some classifications includes the Selaginellaceae and Isoetaceae order Selaginellales, Selaginellales - in some classifications included in Lycopodiales Isoetales, order Isoetales - aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales