All Sources -
Updated Media sources (1) About encyclopedia.com content Print Topic
Cordaitales Extinct gymnosperm order, included in the Coniferopsida, which appeared in early Carboniferous times and disappeared towards the end of the Permian. They produced trees up to 30m high, with strap-like leaves and primitive cones. Some cordaitaleans developed stilt roots, probably lived in swamp habitats, and were analagous to modern mangroves. Fossils of stems, leaves, roots, and cones are locally abundant in coal. The term Cordaites is a form-genus name, and strictly applies to the leaves of cordaitaleans, but it has often been used informally for the whole plant. Other form-genera include Cordaianthus for cordaitean cones, Amelyon for the roots, and Dadoxylon, Araucarioxylon, Mesoxylon, and Pennsylvanioxylon, according to type or age, for stem fragments and wood.
More From encyclopedia.com
Mangroves (plants) , Mangrove swamps or forests are the tropical equivalent of temperate salt marshes. They grow in protected coastal embayments in tropical and subtropic… Root Nodule , root nodule A swelling on the roots of certain plants, especially those of the family Fabaceae (Leguminosae), that contains bacteria (notably Rhizobi… Prop Root , prop root Any of the modified roots that arise from the stem of certain plants and provide extra support. Such stems are usually tall and slender and… Root , root1 / roōt; roŏt/ • n. 1. the part of a plant that attaches it to the ground or to a support, typically underground, conveying water and nourishmen… Mycorrhiza , A “fungus root” or mycorrhiza (plural: mycorrhizae) is a fungus living in a mutually beneficial symbiosis (or mutualism) with the roots of a vascular… radicle , rad·i·cle / ˈradikəl/ • n. Bot. the part of a plant embryo that develops into the primary root. ∎ Anat. a rootlike subdivision of a nerve or vein. DE…
You Might Also Like