BioImages: The Virtual Field-Guide (UK)
Miyagia pseudosphaeria (Mont.) Jørst. (a rust fungus)
||19 August 2007
|OS grid ref
||51° 20' N, 1° 20' W
||Vice County: Berks, VC22, England
(Please quote this in any queries about this record)
|Stage or state
||Uredia and telia, on underside of sensecent basal leaves of Prickly Sowthistle
||on underside senescent leaf (basal) of Sonchus asper
||Small punctate, pale orange-brown uredia, bursting through lower epidermis, each surrounded by a brown ring of paraphyses. Uredospores ±cylindric-ellipsoid, echinulate, thick-walled.
Telia similar but darker, dark brown to black. Teliospores: single-celled (mesospores), shortly ellipsoid, mid brown, stalked, with many pores.
There were also a few larger subcuticular uredia which were smooth and lacked the palisade of dark paraphyses. These might well be a different species of rust.