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Soortgroepen => Paddenstoelen => Roesten => Topic gestart door: carina op augustus 02, 2018, 10:53:54 AM

Titel: Melampsora euphorbiae or Melampsora euphorbiae-dulcis
Bericht door: carina op augustus 02, 2018, 10:53:54 AM
Hello Julia,

I found a Melampsora on  Euphorbia lathyris.
Uredinia with capitate paraphyses. Urediniospores 15-19 x 18-24 µm. Teliospores subepidermal (23)-33-35-40-(43) x 8-14 µm.
Is this Melampsora euphoriae or Melampsora-dulcis?

Carina
Titel: Re: Melampsora euphorbiae or Melampsora euphorbiae-dulcis
Bericht door: Julia Kruse op augustus 07, 2018, 01:38:44 AM
Hey Carina,

could you give me a meassurement for the width of the head of the paraphysis? 14-16 or 15-20 µm?

The size of the teliospores hints in the direction of Melampsora euphorbiae.

For me this makes sense, becaus Euphorbia lathyris occurs often in gardens, together with Euphorbia peplus, which is quite common infected with Melampsora euphorbiae.

Cheers,
Julia

Titel: Re: Melampsora euphorbiae or Melampsora euphorbiae-dulcis
Bericht door: carina op augustus 09, 2018, 08:48:45 AM
Hey Julia,

The width of the head of the paraphysis is 15-20 µm.

Carina
Titel: Re: Melampsora euphorbiae or Melampsora euphorbiae-dulcis
Bericht door: Julia Kruse op augustus 09, 2018, 23:19:43 PM
Hello Carina,

perfect! This fits with my determination, because the paraphyses head is 15-20 µm for Melampsora euphorbiae.

Thanks for meassuring!

Cheers,
Julia