The lamina has indistinct nervation.

The leaves possess indistinct nervation.

It shows unusual palmate nervation, with the midrib branching and connecting to the lateral veins around 1 cm below the apex.

Remarques sur la nervation alaire des Oligoneuridae (Ephemeroptera), Bulletin de l'Institut royal des Sciences naturelles de Belgique, 51, pp.

Its leaves are simple, ovobate to suborbicular, 1,5-6(-10) cm long, 1-5 (-8) cm wide, glabrous and shining dark green above and densely golden or brownish tomentose below, with serrate margins and raised nervation.

In their 2001 monograph, Cheek and Jebb considered N. glabrata to be most closely allied to N. muluensis based on its atypical lid nervation as well as the size, shape, and pigmentation of its upper pitchers.