For a long time, it was considered to consist of only one species, Trichoderma viride, named for producing green mold.

Conidiophores are highly branched and thus difficult to define or measure, loosely or compactly tufted, often formed in distinct concentric rings or borne along the scant aerial hyphae.

Conidia typically appear dry, but in some species, they may be held in drops of clear green or yellow liquid (e.g., T. virens, T. flavofuscum).

Conidia appear colorless to green, smooth to rough, and are in moist conidial masses, variable in shape and size, small, 2.8– 4.8 μm for common species.

Synanamorphs are recognized by their solitary conidiophores that are verticillately branched and that bear conidia in a drop of clear green liquid at the tip of each phialide.

Chlamydospores are typically unicellular subglobose and terminate short hyphae; they may also be formed within hyphal cells.

These are characterized by the formation of fleshy, stromata in shades of light or dark brown, yellow or orange.

Typically the stroma is discoidal to pulvinate and limited in extent but stromata of some species are effused, sometimes covering extensive areas.

Many species of Trichoderma are major pathogens of cultivated mushrooms, with infections being referred to as "green mold."

This affects in the cells action potential profile, as seen in cardiomyocytes, pneumocytes and neurons leading to conduction defects.

Trilongins are highly resistant to heat and antimicrobials making primary prevention the only management option.

[14][15][16] Cyclosporine A (CsA), a calcineurin inhibitor produced by the fungi Trichoderma polysporum,[17] Tolypocladium inflatum, and Cylindrocarpon lucidum, is an immunosuppressant prescribed in organ transplants to prevent rejection.

[18] Trichoderma, being a saprophyte adapted to thrive in diverse situations, produces a wide array of enzymes.

This article incorporates public domain material from websites or documents of the United States Department of Agriculture.