Golovinomyces asperifoliorum (Gréville) Braun & Shin, 2018
on Pulmonaria, Symphytum
Symphytum officinale, Nieuwendam
Pulmonaria officinalis, Dronten © Arnold Grosscurt: the damage to the plant can be considerable
Symphytum officinale, Nieuwendam: young and old cleistothecia
germinating conidium
upper cleistothecium and asci: Golovinomyces cynoglossi; lower cleistothecium, conidiophore, conidia and appressoria: G. asperifoliorum (fig. 333 from Braun & Cook, 2012a).
parasite
mycelium conspicuous, white, amphigenous, generally persistent. Conidia in chains, elliptic, without fibrosin bodies, Conidiophores rather short, 80–165 mm long; basal septum at the junction with the mother cell not or at most 5 µm elevated. Cleistothecia with 5-20 asci that contain 2 (rarely 3) spores. Appendages numerous, attached on and below the equator. They are up to 2 x as long as the diameter, flaccid, hyaline, septate, generally unbranched.
host plants
Boraginaceae, narrowly oligophagous
Pulmonaria affinis, angustifolia, dacica, longifolia, mollis, montana, obscura, officinalis, rubra, saccharata; Symphytum asperum, bulbosum, caucasicum, cordatum, grandiflorum, ibericum, officinale & subsp. uliginosum, orientale, ottomanum, tauricum, tuberosum & subsp. angustifolium, x uplandicum.
notes
See the note about the Golovinomyces cynoglossi complex.
references
Braun, Bradshaw, Zhao ao (2018a).