GROWTH CHARACTERS.-Growth slow, 2.0 cm in 1 week. Advancing zone white, even, slightly raised. Mat white, cottony to cottony-woolly in the major portion, short cottony mycelium below the advancing zone, floccose-cottony at some places and velvety over the inoculum. Reverse unchanged. Odour pleasant.
Tests for extracellular oxidase negative; on gallic and tannic acid agars diffusion zones lacking, growth 0.7 cm on former and 1.5 cm on latter, guaiacum reaction negative.
HYPHAL CHARACTERS.-Advancing zone: hyphae hyaline, thin-walled, branched, nodose septate, 1.5—4.6 µm diameter. Aerial mycelium: (a) hyphae as in advancing zone but sometimes clamp connections in pairs; (b) chlamydospores slightly thick-walled, intercalary, oval to cylindrical, 20.1-24.6 × 6.1-10.7 µm. Submerged mycelium: hyphae as in aerial mycelium.
CULTURES EXAMINED: FRI 225, 226 & 697: Polysporous cultures, isolated from 3639 and 4939 on stumps of Shorea robusta Gaertn., causing brown cuboidal rot.
Reference: Bagchee (1954).
T. cubensis is characterized by its white cottony-woolly mat and presence of chlamydospores.