18-05-2024 10:47
Anna KlosGoodmorning,We found this tiny ascomycete (max. 1m
25-03-2024 19:14
Juuso ÄikäsI found some small black pyrenos growing on a dead
10-05-2024 17:40
Anna KlosGood afternoon, Thursday during an inventory we f
17-05-2024 16:25
Pavel JiracekErioscyphella lunata, found on a fallen needle of
29-01-2022 21:44
Jan EcksteinGood evening, apothecia small, yellowish, 150-300
16-05-2024 11:19
Sylvie Le GoffBonjour, j'ai récolté sur une branchette de feui
14-05-2024 09:19
Hans-Otto BaralHi, I want to announce for next Sunday 17.00 middl
16-05-2024 11:49
Castillo JosebaDe ayer en rama de abetoNo se por donde mirarA ver
Esporas 7-10 X 2-2,5 um, cilindricas.contenido aceite 0.
Ascas 52-65 X 5-6 um, IKI +, croziers +
Parafisis anchamente lanceoladas 7-8 um, que sobresalen de las ascas 10-20 um, Vbs -.
Pelos 80-100 X 4-4,5 um, septados, Vbs -
Parece próximo a L. virgineum, pero las esporas de esta colección parecen más anchas.
Alguna idea?
Saludos
Javier
Zotto
Saludos
Javier
I have a similar problem with Lachnum papyraceum collected on Picea abies (mountain forest in central Europe). Spore size in Nordic Macromycetes vol. 1 is 4-6 x 1-1.5 um; in an older description (Saccardo 1889) the length is 3-7 um.
Many spores are bigger in my collections, e.g. (6-) 8 x 2, 10 x 2 um, but some 5 x 1.5 or 8 x 1.5 also occur (these are inside asci and may not be mature). The width of most spores is rather 2 than 1.5 um. Everything else seems to fit L. papyraceum, but I do not have an experince with these species (do not have a more comprehensive key than Nordic Macromycetes).
Thanks,
Vaclav
The few records I have of that species vary in spore length betwee short and long-spored.
Here is an example, and I so far found no other name for it.
My spore range of the long-spored variant is:
7.5-11.7 x 1.7-2.6
Important is that the paraphyses and hairs contain strongly refractive VBs which cause the red-brown colouration in senescent apothecia.
Older apothecia became brownish after drying, and hymenium is quite dark in some cases. Only very young sporocarps are whitish even when dry.
Thank you for nice drawings.
But please use IKI for the apical ring because of the red reaction in some species.
The VB-guttules (vacuolar, not lipidic) in the living state are impossible to trace in herbarium material in Lachnum. Any granules you see in dried samples rehydrated in water or MLZ are of different origin and taxonomically useless.
The VBs induce the red-brown colour change in the dry or senescent state. Young apothecia when cautiously dried best keep the whitish original colour.
Zotto