Miyagia pseudosphaeria (Montagne) Jørstad, 1962

on Sonchus

Sonchus arvensis, Nieuwendam: (old) uredinia and telia, hypophyllous

Miyagia pseudosphaeria: old uredium surrounded by telia

old uredinium, surrounded by a ring of telia

Miyagia pseudosphaeria: uredinium encircled by paraphyses

the uredinium is encircled by a row of purplish brown paraphyses

Miyagia pseudosphaeria: paraphyses around the uredinium

detail of the paraphyses

Miyagia pseudosphaeria: living urediniosporeMiyagia pseudosphaeria: empty urediniospore

urediniospores

Miyagia pseudosphaeria: telium, detail

the telia remain covered by the epidermis

Miyagia pseudosphaeria: teliosporen

teliospores

Miyagia pseudosphaeria: teliosporeMiyagia pseudosphaeria: teliospore

the teliospores are unusually angular

Miyagia pseudosphaeria on Sonchus palustris

Sonchus palustris, Amsterdam-West, Lange Bretten

Miyagia pseudosphaeria on Sonchus palustris

underside, with uredinia (leaves with telia were older and looked diseased)

gall

no host alternation; only uredinia and telia. Also the telia are surrounded, and sometimes compartimentalised, by rows of paraphyses. Less often than one-celled teliospores also two-celled ones do occur.

hostplants

Asteraceae, monophagous

Sonchus acaulis, arvensis & subsp. uliginosus, asper & subsp. glaucescens, brachylobus, congestus, hierrensis, leptocephalus, maritimus, mauritancus, oleraceus, palmensis, palustris, radicatus, tenerrimus.

synonyms

Peristemma pseudosphaeria (Montagne, 1840) Jørstad, 1956; Puccinia pseudosphaeria Montagne, 1840; Puccinia sonchi Roberge, 1849.

references

Brandenburger (1972a, 1985a: 694), Buhr (1965a), Ellis & Ellis (1997a), Gäumann (1959a), Gjaerum (1976a, 1987a), Gjaerum & Dennis (1976a), González Fragoso (1924a), Jage, Klenke, Kruse ao (2016a), Henderson (2000a, 2004a), Klenke & Scholler (2015a), Kruse & Jage (2014a), Losa España (1942a), Maier, Wingfield, Mennicken & Wingfield (2007a), Poelt & Zwetko (1997a), Redfern & Shirley (2011a), Roldan Garrigós & Honrubia García (1992a), Savchenko, Heluta, Wasser & Nevo (2014c), Săvulescu & Rayss (1935a), Spooner & Butterfill (1999a), Termorshuizen & Swertz (2011a), Vanderweyen & Fraiture (2008a), Wilson & Henderson (1966a), Zwetko & Poelt (1989a), Woods, Stringer, Evans & Chater (2015a).

mod 13.viii.2018