Golovinomyces verbenae (Schweinitz) Heluta, 1988

on Verbena

gall

mycelium amphigenous, dense, persistent. Appressoria indistinctly nipple-shaped. Conidia short-elliptic, formed in chains, without fibrosin bodies. Foot cell of conidiophore ± strait, 40-80 µm long. Cleistothecia 80-160 µm, with 5-20 two-spored asci. Appendages numerous, equatorial and sub-equatorial, 0.5 -3 x the diameter; they are mycelioid, septate, mostly unbranched, brown.

hostplants

Verbenaceae, monophagous

Verbena hastata, hybrida, officinalis.

Podosphaera verbenae.

references

Braun & Cook (2012a), Henricot (2009a), Klenke & Scholler (2015a).