• (a.) Composed of leaves united by their edges (coalescent).
<botany> Having the leaves or perianth segments united by their margins, at least at the base. ... (09 Oct 1997) ... 
Ga·moph'yl·lous adjective [ Greek ... marriage + ... leaf.] (Botany) Composed of leaves united by their edges (coalescent). Gray. 
Leaves united.