Acrostalagmus is a genus of fungi belonging to the family Plectosphaerellaceae.

[1] The genus was described in 1838 by August Carl Joseph Corda.

[1] The commonest species is a hyphomycete, Acrostalagmus luteoalbus, which makes verticillate conidiophores with orange balls of slimy 1-celled conidia.

The species was often classified in Verticillium until DNA phylogenies suggested that the root-pathogenic species of that genus are distinct.

[2] The synnematous species Acrostalagmus annulatus is also relatively common.