04-07-2022 15:21
Jason Karakehian
Hi everyone, I am looking for a specimen of Propo
03-07-2022 13:13
ruiz Jose antonioHola a todos,en resto de herbáceas,en zona muy hÃ
23-06-2022 08:52
Josep Torres
Hola.Un pequeño discomiceto sobre la superficie d
28-06-2022 20:12
Zuzana Sochorová (Egertová)
Hello,I repeatedly collect a foliicolous Ascobolus
01-07-2022 15:28
Thomas Læssøehttps://svampe.databasen.org/observations/10267081
01-07-2022 15:18
Thomas Læssøehttps://svampe.databasen.org/observations/10278120
Looking for a specimen of Propolis farinosa on Populus nigra from France
Jason Karakehian,
04-07-2022 15:21
Hi everyone,I am looking for a specimen of Propolis farinosa from France, on Populus nigra (black poplar). Any help would be much appreciated. Here are some macro and micro images. Many of you are probably very familiar with this fungus. Propolis farinosa is pretty common, so you may find it easily. Search on dead branches of the living tree, so you can be sure it came from P. nigra. If you find it, please AIR DRY only and contact me right away: jasonmk3[at]illinois.edu.
I want to neotypify Stictis farinosa toward a revision of this genus toward my dissertation research. Thank you!
Hans-Otto Baral,
04-07-2022 15:30
Re : Looking for a specimen of Propolis farinosa on Populus nigra from France
Hi Jason
I looked in the protologue where the collector is given as D. Dufour. I do not know the full name, he/she is not in the Author Index of IF. So it can be from everywhere in France? Or even elsewhere?
A bit strange is the black margin of the mealy disc.
Zotto
Jason Karakehian,
04-07-2022 15:59
Re : Looking for a specimen of Propolis farinosa on Populus nigra from France
Hi Zotto,
Thank you for your insights! Yes, I think that "D. Dufour" is Jean Marie Léon Dufour (1780-1865). You can find Dufours in the TL-2 (https://www.sil.si.edu/DigitalCollections/tl-2/search.cfm). This is not Léon Marie Dufour (1862-1942) who described Propolis viridis in 1896. Our Dufour collected specimens from a place called St. Sever. I'm not sure where this is in France. I think that if I can get a specimen from Populus nigra anywhere in France that will probably do for a neotypification or epitypification, not sure yet. I'm presuming France because I'm guessing that's where Dufour collected it, but I don't really know. I suppose a specimen from nearby localities might be okay.
The interior of the flaps or covering layer can become very dark in some specimens of P. farinosa - often in mature specimens where the periphysoids have deteriorated. But who knows what Persoon was looking at.
Regarding the black margin and mealy disc. I saw two specimens labeled Stictis farinosa in Leiden. One specimen was typified by Sherwood, but this is not a Stictis (Propolis). It is primordia of some pyrenomycete (perhaps a Dothideomycete) developing on the surface of the wood, not erumpent like Propolis. The exterior of these are highly melanized, with a white stromatic interior. The tops of many of these primordia have been damaged somehow, exposing a white "mealy" disc with a black border. They superficially look very much like P. farinosa, but they are not. There are no asci or spores. Sherwood's typification was tentative. It should be overturned. The other specimen is some crystaline material in roughly the shape and size of Propolis apothecia. These are also without any hymenial elements. I had no other original material in L. There may be material of Dufour's on P. nigra in PC, but I'm not sure yet and will have to wait for someone to help me go over some things that I didn't get to on my trip.
Anyhow, I thought that I'd start the ball rolling on trying to get another specimen.