Canadian Medical Guide > Organisms > Plants > Plant Families and Groups Terms and Definitions




Plant Families and Groups

Medical Definition: Groupings that include specific plants within larger families or divisions.
Guide Notes: not used for indexing CATALOG: do not use
Plant Families and Groups Categories.
Canadian Medical Guide Definition Angiosperms - Any member of the more than 250,000 species of flowering plants. Angiosperms are often differentiated from GYMNOSPERMS by their production of seeds within a closed chamber (OVARY, PLANT). The Angiosperms division is composed of two classes, the monocotyledons (Liliopsida) and dicotyledons (Magnoliopsida).
Canadian Medical Guide Definition Bryophyta - A division of the plant kingdom. Bryophyta contains the subdivision, Musci, which contains the classes: Andreaeopsida, BRYOPSIDA, and SPHAGNOPSIDA.
Canadian Medical Guide Definition Equisetum - The only living genus of the order Equisetales, class Equisetopsida (Sphenopsida), division Equisetophyta (Sphenophyta); distantly related to ferns. It grows in moist places. The hollow, jointed, ridged stems contain SILICATES.
Canadian Medical Guide Definition Ferns - Seedless nonflowering plants of the class Filicinae. They reproduce by spores that appear as dots on the underside of feathery fronds. In earlier classifications the Pteridophyta included the club mosses, horsetails, ferns, and various fossil groups. In more recent classifications, pteridophytes and spermatophytes (seed-bearing plants) are in the division, or phylum, Tracheophyta.
Canadian Medical Guide Definition Gymnosperms - Gymnosperms are a group of vascular plants whose seeds are not enclosed by a ripened ovary (fruit), in contrast to ANGIOSPERMS whose seeds are surrounded by an ovary wall. The seeds of many gymnosperms (literally, "naked seed") are borne in cones and are not visible. Taxonomists now recognize four distinct divisions of extant gymnospermous plants (CONIFEROPHYTA, CYCADOPHYTA, GINKGOPHYTA, and GNETOPHYTA).
Canadian Medical Guide Definition Hepatophyta - A plant division. They are simple plants that lack vascular tissue and possess rudimentary rootlike organs (rhizoids). Like MOSSES, liverworts have alternation of generations between haploid gamete-bearing forms (gametophytes) and diploid spore-bearing forms (sporophytes).
Canadian Medical Guide Definition Lycopodiaceae - The club-moss plant family of the order Lycopodiales, class Lycopodiopsida, division Lycopodiophyta, subkingdom Tracheobionta. The common name of clubmoss applies to several genera of this family. Despite the name this is not one of the true mosses (BRYOPSIDA ).
Canadian Medical Guide Definition Selaginellaceae - A plant family of the order Selaginellales, class Lycopodiopsida, division Lycopodiophyta, subkingdon Tracheobionta. Members contain bilobetin. The rarely used common name of resurrection plant is mainly used with CRATEROSTIGMA.

Plant Families and Groups Medical Definitions and Terms

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