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10-03-2026 18:08

Orange discs on Arctium
Marc Detollenaere Marc Detollenaere

Dear Forum,On stems of Arctium, I found some downy

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Orange discs on Arctium
Marc Detollenaere, 10-03-2026 18:08
Marc DetollenaereDear Forum,

On stems of Arctium, I found some downy orange discs with hyaline spores of 22-23x14-15µ , slightly verrucose, no drops. A slight amyloied reaction was seen on the asci.
Could it be Iodophanus?

Marc
  • message #84760
  • message #84760
  • message #84760
  • message #84760
Enrique Rubio, 10-03-2026 18:32
Enrique Rubio
Re : Orange discs on Arctium
Yes, Iodophanus. The problem is what species it is. Iodophanus has been studied very little.
Lieve Deceuninck, 10-03-2026 18:47
Lieve Deceuninck
Re : Orange discs on Arctium
Marc, Iodophanus verrucosporus occurs in Flanders, see http://www.ascofrance.fr/search_forum/13515 (Piet posted it for me)