It produces light brown, lobed, gelatinous basidiocarps (fruit bodies) and is parasitic on other fungi on dead branches of broad-leaved trees.

Tremella vesiculosa was first published in 1990 by Robert Bandoni and Peter Buchanan, based on collections and notes made by the late New Zealand mycologist R.F.R.

Microscopically, the basidia are tremelloid (subglobose to broadly clavate, with oblique to vertical septa), 4-celled, 11.5 to 20 by 8 to 12.5 μm.

[1] Phaeotremella species are both brown and gelatinous, but have lobes that are comparatively thin, uninflated, and frondose.

Tremella laurisilvae, described from the Canary Islands, is similar but geographically distant.