excurrent

adjective

(L. excurrere: to run out, run forth, project, continue) A growth habit with a single vertical trunk, the branches obviously secondary, as in spruces and some other conifers. Running out, as a costa (nerve) of a leaf running out, projecting beyond the lamina of a leaf, beyond the margin. Projecting beyond the apex (tip), as the midrib of a leaf or bract, e.g. an awn formed by a protruding costa, used especially of the midrib of a mucronate leaf.