Having observed recently, that all the fern rusts (Milesina Spp.) seem to be having their season, I thought I would check any Wall Rue I came across, looking for the tiny whitish spore masses so characteristic of the genus Milesina (who says rusts have to look rusty?) and on the first plant I looked at, there they were. A couple of days later, I happened to notice a plant growing in an old school wall, as I walked past. I turned a frond over and there were the tiny white spots. I have since found it at a third site (I have only looked in three sites), so although M. murariae is described as rare, it is probably just uncommon and overlooked, just like a lot, if not most so called rare microfungi.
|The white spore masses on the underside of a Wall Rue Pinna|
If you want to give the fern rusts a go, then now is the time to get the hand lens out and start looking under those manky looking fronds.
|Dryopteris Filix-mas, with the spores of, most probably M. kriegeriana, which is|
the common rust found on Male Fern, but it is possible that it might be M.
carpatorum, which is regarded as rare. Only microscopic examination of the
spores will tell.
|Uredispores of M. scolopendrii, on the underside a the frond of Hart's-tongue Fern.|