Cordaixylon
authorship:
Grand'Eury, 1877
rank:
morphogenus
morphotaxon organ:
wood
morphogenus
Cordaitean plants with endarch maturation of the cauline xylem and compound cones borne irregularly as epicormic branches. Leaves helically arranged; primary cascular architecture sympodial, with the number of sympodia equaling the denominator of the phyllotactic fraction. Leaf traces diverge from margin of pith as one or two bundles; branching axillary, with bud or branch vascularized by two bundles that diverge from stem distal to leaf trace emission. Leaves range from needle-like to spatulate, often produced in heteroblastic series.