Corylopsis maii was named by Collinson et al. (2012) [Infructescence spicate, consisting of a stout axis up to 1.5 mm thick, and up to 52 mm long, with helically arranged, sessile fruits. Individual fruit capsules rounded-quadrangular to subcircular in lateral outline (5–5.8 mm in height and breadth), opening loculicidally from the apex. Fruits with rough, irregularly verrucate surface, with a median longitudinal septal groove in a plane of bisymmetry extending to the apex. A pair of short, thick, persistent styles well separated from each other at the apex, with tips divergent and slightly outwardly curved. Cup-like structure (calyx) surrounding the base of each fruit, reaching about a quarter to a third of the distance from the base, with a smooth, unlobed margin. Number of fruits per axis up to 18 or more.]. It is not extant. Its type specimen is Holotype SM.B Me 14508, a fertile axis.