ABSTRACT: Thirteen graminicolous species currently or previously assigned to the genus Alternaria are illustrated from type, authentic and/or representative cultures and exsiccati. Concise descriptions and a key to morphological characters are provided and tested against small-spored, chain-forming strains isolated by the authors. An additional eleven names for which material was unavailable, insufficient for accurate description, or of only incidental occurrence on Poaceae are listed. A small number of small-spored, chain-forming strains were poorly accommodated within the descriptions and may represent unnamed species.

KEYWORDS: Species concept, Trichoconiella

NOMENCLATURAL NOVELTIES:
None.