order - (biology) taxonomic group containing one or more families

kingdom Plantae, plant kingdom, Plantae - 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; probably extinct since the Mesozoic

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

order Papaverales, order Rhoeadales, Papaverales, Rhoeadales - an order of dicotyledonous plants

Campanulales, order Campanulales - an order or 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