| Noun | 1. | plant order - the order of plants order - (biology) taxonomic group containing one or more families kingdom Plantae, plant kingdom, Plantae - (botany) the taxonomic kingdom comprising all living or extinct plants Anthocerotales, order Anthocerotales - hornworts; liverworts having a thalloid gametophyte; in some classification systems included in the class Hepaticopsida Andreaeales, order Andreaeales - comprises a single genus: Andreaea Bryales, order Bryales - category used in some classification systems for mosses having the spore case separated from the capsule wall by a hollow intercellular space Dicranales, order Dicranales - widely distributed order of mosses with erect gametophores and sporophytes at the tips of stems Eubryales, order Eubryales - mosses with perennial erect gametophores and stems with rows of leaves and drooping capsules order Sphagnales, Sphagnales - coextensive with the genus Sphagnum; in some classifications isolated in a separate subclass Jungermanniales, order Jungermanniales - large order of chiefly tropical liverworts Marchantiales, order Marchantiales - liverworts with gametophyte differentiated internally order Sphaerocarpales, Sphaerocarpales - small order sometimes included in the order Jungermanniales Gnetales, order Gnetales - chiefly tropical or xerophytic woody plants; practically unknown as fossils but considered close to the ancestral line of angiosperms Cycadales, order Cycadales - primitive tropical gymnosperms abundant in the Mesozoic, now reduced to a few scattered tropical forms Bennettitales, order Bennettitales - fossil gymnospermous plants of the Carboniferous Cycadofilicales, Lyginopteridales, order Cycadofilicales, order Lyginopteridales - fossil gymnospermous trees or climbing plants from the Devonian: seed ferns Cordaitales, order Cordaitales - extinct plants having tall arborescent trunks comparable to or more advanced than cycads; known from the Pennsylvanian period; probably extinct since the Mesozoic era Coniferales, order Coniferales - profusely branching and chiefly evergreen trees and some shrubs having narrow or needlelike leaves order Taxales, Taxales - coextensive with the family Taxaceae: yews Ginkgoales, order Ginkgoales - coextensive with the family Ginkgoaceae: plants that first appeared in the Permian and now represented by a single surviving species; often included in Coniferales order Ranales, order Ranunculales, Ranales, Ranunculales - herbs, shrubs and trees: includes families Ranunculaceae; Annonaceae; Berberidaceae; Magnoliaceae; Menispermaceae; Myristicaceae; Nymphaeaceae; Lardizabalaceae; Lauraceae; Calycanthaceae; Ceratophyllaceae; Cercidiphyllaceae Myricales, order Myricales - coextensive with the family Myricaceae Arales, order Arales - Araceae; Lemnaceae Aristolochiales, order Aristolochiales - order of plants distinguished by tubular petaloid perianth and inferior ovary Caryophyllales, Chenopodiales, order Caryophyllales, order-Chenopodiales - corresponds approximately to the older group Centrospermae Opuntiales, order Opuntiales - coextensive with the family Cactaceae: cactuses Campanulales, order Campanulales - an order of plants of the subclass Asteridae including: Campanulaceae; Lobeliaceae; Cucurbitaceae; Goodeniaceae; Compositae Orchidales, order Orchidales - order of plants with irregular flowers having minute seeds: Orchidaceae; Burmanniaceae order Primulales, Primulales - Primulaceae; Theophrastaceae; Myrsinaceae; and (in some classifications) Plumbaginaceae order Plumbaginales, Plumbaginales - coextensive with the family Plumbaginaceae; usually included in order Primulales Graminales, order Graminales - grasses; sedges; rushes order Pandanales, Pandanales - families Typhaceae; Sparganiaceae; Pandanaceae Malvales, order Malvales - Malvaceae; Bombacaceae; Elaeocarpaceae; Sterculiaceae; Tiliaceae order Umbellales, Umbellales - plants having umbels or corymbs of uniovulate flowers; includes the Umbelliferae (chiefly herbs) and Cornaceae (chiefly trees or shrubs) order Proteales, Proteales - coextensive with the family Proteaceae |