A revision of Cyanonectria and Geejayessia gen. nov., and related species with Fusarium-like anamorphs.

A revision of Fusarium-like species associated with the plant genus Buxus led to a reconsideration of generic concepts in the Fusarium clade of the Nectriaceae. Phylogenetic analyses of the partial second largest subunit of the RNA polymerase II (rpb2) and the larger subunit of the ATP citrate lyase (acl1) gene exons confirm the existence of a clade, here called the terminal Fusarium clade, that includes genera such as Fusariumsensu stricto (including its Gibberella teleomorphs), Albonectria, Cyanonectria, "Haematonectria", the newly described genus Geejayessia, and "Nectria" albida. Geejayessia accommodates five species.

An overview of the taxonomy, phylogeny, and typification of nectriaceous fungi in Cosmospora, Acremonium, Fusarium, Stilbella, and Volutella.

A comprehensive phylogenetic reassessment of the ascomycete genus Cosmospora (Hypocreales, Nectriaceae) is undertaken using fresh isolates and historical strains, sequences of two protein encoding genes, the second largest subunit of RNA polymerase II (rpb2), and a new phylogenetic marker, the larger subunit of ATP citrate lyase (acl1). The result is an extensive revision of taxonomic concepts, typification, and nomenclatural details of many anamorph- and teleomorph-typified genera of the Nectriaceae, most notably Cosmospora and Fusarium. The combined phylogenetic analysis shows that the present concept of Fusarium is not monophyletic and that the genus divides into two large groups, one basal in the family, the other terminal, separated by a large group of species classified in genera such as Calonectria, Neonectria, and Volutella.

Phytophthora x pelgrandis, a new natural hybrid pathogenic to Pelargonium grandiflorum hort.

A new Phytophthora hybrid of Ph. cactorum (Leb. & Cohn) Schroet.

Evolution of Fusarium oxysporum f. sp. vasinfectum Races Inferred from Multigene Genealogies.

ABSTRACT Fusarium wilt of cotton is a serious fungal disease responsible for significant yield losses throughout the world. Evolution of the causal organism Fusarium oxysporum f. sp.

Siepmannia, a new genus in the Mucoraceae.

A new genus Siepmannia of the Mucoraceae family is described. Siepmannia pineti sp. nov.