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on Asplenium

Asplenium scolopendrium, from González-Fragoso (1925a): section through part of an uredinium: te upper cell layer is the epidermis of the host plant; the layer below is the wall of the uredinium: the peridium

Asplenium scolopendrium, Belgium, prov. Liège, Plombières, Haldes calaminaires de Plombières, 1.v.2019 © Carina Van Steenwinkel

leaf underside with extruded masses of urediniospores

detail

part of a leaf, lighted from behind, showing a large number or brown uredinia (the opening is an artefact)

urediniospore

urediniospores

urediniospores

gall

uredinia hypophyllous, pustulate, covered with a brown epidermis, in which a pare develops; spores short club shaped, remotely spinulose, on a short, plump pedicel. The uredinia ripen in late autumn and winter, releasing a white mass of spores, especially in damp weather. Telia at the underside of brown parts of the hibernated fronds. The spores are formed in the epidermis cells; they are irregular in shape, thin-walled, 1-40 celled.

uredinia, telia

Aspleniaceae, narrowly monophagous

Asplenium scolopendrium.

synonyms

Milesia scolopendrii.

references

Brandenburger (1985a: 7, 15), Bubner, Buchheit, Friedrich ao (2019a), Eichhorn (1941a), Ellis & Ellis (1997a), Gäumann (1959a), González-Fragoso (1925a), Hafellner (1980a), Henderson (2000a, 2004a), Hick & Preece (1990a), Klenke & Scholler (2015a), Maier, Begerow, Weiß & Oberwinkler (2003a), Negrean (1996b), Poelt & Zwetko (1997a), Termorshuizen & Swertz (2011a), Wilson & Henderson (1966a), Woods, Stringer, Evans & Chater (2015a).