04-11-2025 09:07
Josep Torres
Hello.A suspected Hymenoscyphus sprouting on a thi
04-11-2025 12:43
Edvin Johannesen
Hi! One more found on old Populus tremula log in O
03-11-2025 21:34
Edvin Johannesen
These tiny (0.4-0.5 mm diam.), whitish, short-stip
28-10-2025 15:37
Carl FarmerI'd be grateful for any suggestions for this strik
03-11-2025 16:30
Hans-Otto Baral
Hello I want to ask you if you have found this ye
28-10-2025 19:33
Nicolas Suberbielle
Bonjour à tous,Je voudrais votre avis sur cette r
I have a Hysterium on resin from bark of Picea abies. It deviates from H. pulicare found on a nearby tree. The ascomata are narrower and more upright with a slightly "sharper" apical edge, and a narrower base. Spores measure 20-26 x 6-8 microns, 3-septate without constrictions and end-cells not notably paler (only on a few of the spores). Could it be H. angustatum? (Is H. angustatum synonymous with H. acuminatum?). Or is this within the variability of H. pulicare?
Hi Edvin,
To my mind, it's definitively not H. pulicare.
H. angustatum is considered to be the most widespread species, in a variety of substrates (including Picea). But your collection, which I would link to H. angustatum, is still atypical. Perhaps a serious study would be necessary to better understand what H. angustatum really is.
Getting molecular data could be an excellent idea, as an anticipation.
Alain