Vegetative hyphal fusion in <i>Epichloë</i> grown in culture.

1) Species names are based on the revised nomenclature of Epichloë species [23]. 2) NH; non-hybrid. H; hybrid. 3) Hyphal fusion ++, commonly undergoing vegetative hyphal fusion (the average number of vegetative hyphal fusion in the observed area in one set of experiments (8067.6 μm2) was ≥ 1, which corresponds to ca. > 10 vegetative hyphal fusion per mm2) +, rarely undergoing vegetative hyphal fusion (the average number of vegetative hyphal fusion in the observed area was < 1) ND, fusion not detected 4) Hyphal cords (see S2 Fig); ++, extensive cords of more than ten hyphae running side by side + minor cords of ca. five hyphae -, no cords Vegetative hyphal fusion in Epichloë grown in culture.