Orange disc on Juniperus - Forum ASCOFrance

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Orange disc on Juniperus

Marc Detollenaere, 12-03-2018 23:39

Good evening everybody,

In La Ste-Baume in Provence I found some orange discs on Juniperus communis with a hymenium surface appearing granular. The asci were 8-spored and the ascus wall was Melzer positive. Paraphyses were slender and had yellow cristals at the end. Spores measured 11x6µ.

Anyone could help me further?

Peter Püwert, 13-03-2018 00:22

Re : Orange disc on Juniperus

Hi Marc,
in my opinion is these a lichen. Here a link.
Greetings Peter.
http://www.lichens.lastdragon.org/lichenicolous/Marchandiomyces_corallinus.html

Marc Detollenaere, 13-03-2018 07:24

Re : Orange disc on Juniperus

Hallo Peter,

Thanks for your reaction.I think you are right. I missed the thallus on examination.

I'll see if I can find the species

Marc

Hans-Otto Baral, 13-03-2018 07:37

Re : Orange disc on Juniperus

I vaguely see the central thick septum and suspect it is a Caloplaca.

Zdenek Palice, 13-03-2018 09:06

Re : Orange disc on Juniperus

Yes, it is Caloplaca s.lat. It was split recently on many smaller genera, and it may well be e.g. Caloplaca (Blastenia) hungarica or still something else. But this is a question for a specialist on Teloschistaceae. Zdenek

Marc Detollenaere, 19-03-2018 19:52

Re : Orange disc on Juniperus

Thanks very much Zotto and Zdenek.

Sorry for my late response. I was abroad for a week

Marc

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