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Clam on a stalk
David Malloch,
04-06-2011 13:40
This small discomycete occurs on overwintered leaves of Alnus viridis on my property. It is never abundant, but I found it in May, 2009 and again this year. The apothecia look like little brown clams on top of a stalk. When it is moist the "clam" opens to expose the white hymenium, similar to what species of Lophodermium do, and when it is dry they close again.
Some asci appear to detatch from their croziers and float free but I am not sure if that always happens. I have been unable to identify it. It has some similarities to members of the Caliciales, but the habitat and ascus apex seem wrong for that group. Do any of you recognize this fungus?
Dave
Stip Helleman,
04-06-2011 13:56
Gernot Friebes,
04-06-2011 13:59
Re : Clam on a stalk
Hi Dave,
looks like Mytilodiscus alnicola to me: http://www.mycokey.com/MycoKeySolidState/species/Mytilodiscus_alnicola.html
Best wishes,
Gernot
looks like Mytilodiscus alnicola to me: http://www.mycokey.com/MycoKeySolidState/species/Mytilodiscus_alnicola.html
Best wishes,
Gernot
David Malloch,
04-06-2011 14:13
Re : Clam on a stalk
Thanks Stip and Gernot. That's a perfect fit. Judging from the name I should have called it "Mussel-on-a-stipe" instead of "Clam-on-a-stipe".
Dave
Dave