Cultures quicker growing than H. semiorbis and H. coprosma, floccose, sometimes ,discolouring media, varying from greenish blue to isabelline, especially when cultures are under two weeks old. Mature conidia formed within seven days, yellowish green, sage grey to dark olivaceous in old cultures. Mycelium 4-7µ diameter. Conidiophores formed singly or in clusters 10-100µ long, branched immediately below the septa, terminating in a whorl of phialides. Phialides also formed as lateral branches of conidiophores, flask-shaped 3-7 x 3-4µ. Conidia catenulated from tips of phialides, usually globose, 2.5-4 5 x 2.5-4µ, pigmented and echinulate.

Chlamydospores often present, intercalary or terminal, globose, 7-12µ diameter. Cultures are typical of those of T. viride.