Holdfasts typically formed by <em>Phoma betae</em> when the fungus is grown on water agar and the hyphae come into contact with the plastic lower surface of the petri plate.

Holdfasts typically formed by Phoma betae when the fungus is grown on water agar and the hyphae come into contact with the plastic lower surface of the petri plate.

Photo Source: Lindsey du Toit, Washington State University