It produces stout, dark, branching conidiophores that bear clusters of paler conidia (grey in mass) on denticles from apical ampullae.

[2] The most common species is B. cinerea, which is a plant pathogen causing gray mould on a very broad range of hosts including some common ornamental plants, such as geranium, begonia, rose, lily, dogwood, rhododendron, dahlia, magnolia, camellia [3][4] and fruits and produce.

[4] Other species of Botrytis may be present, such as B. peoniae on peonies, B. squamosa on onion, and B. tulipae on tulips.

The generic name Botrytis is derived from the Greek bótrys ("cluster of", "grapes") and the Latin suffix -itis ("like").

[5] Conidia colorless, gray to pale brown, smooth, ellipsoidal, obovoid, or subspherical, mostly nonseptate.