Accès membres

Mot de passe perdu? S'inscrire

19-10-2025 18:58

Bernard CLESSE Bernard CLESSE

Bonsoir à toutes et tous,Il y a un peu plus de de

19-10-2025 14:10

Camille Mertens

Bonjour à tous.Asco stipité 1mm de texture appar

17-10-2025 18:45

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, Oct. 2025.

23-09-2025 13:31

Thomas Læssøe

https://svampe.databasen.org/observations/10534623

15-10-2025 16:39

Edvin Johannesen Edvin Johannesen

These tiny (0.2-0.6 mm), white, pulvinate apotheci

03-10-2025 13:44

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde on Populus

13-10-2025 19:05

Louis DENY

Bonjour forumSur tronc décortiqué de feuillu x,

17-02-2013 21:11

Peter Welt Peter Welt

Jamoni, P.G. 1998. Un nuovo discomicete coprofilo

11-10-2025 20:27

Marcel Heyligen Marcel Heyligen

Found on a barked branch, 14 mm in diameter, of Ro

11-10-2025 14:20

Jean-Luc Ranger

bonjour à tous, Je ne vois pas comment l'on peut

« < 1 2 3 4 5 > »
Lachnum on Rubus Idaeus
Rasmus Riis-Hansen, 16-05-2019 19:53
Rasmus Riis-HansenHello

I have found this nice Lachnum on last years stem of Rubus idaeus. I firstly thought it was L. clavigerum, but it has a colour change - first yellow as seen on the photo later red-brownish. Also the spores are to big.

Sp. elipsoid-flattened elipsoid, 9-12 x 2-2,5. Asci approx. 55 x 4 µm without croziers, J+ (blue). Hairs cylindrical with warts/spines, some with crystals on the top. Paraphyses fusiform 3,5 µm broad

Cheers

Rasmus
  • message #57773
Lothar Krieglsteiner, 16-05-2019 20:08
Lothar Krieglsteiner
Re : Lachnum on Rubus Idaeus

Hello Rasmus,


in Lachnum you should first note 3 things:


- croziers (you did  and say no)


- contents of living paraphyses (and hairs) - with or without a large amount of vacuolar guttules. I suggest: no


- crystals on the hairs. You do not mention then, so I think no.


L. clavigerum (as far as I have it in my mind correctly) has crystals on the hairs. I never found it on Rubus, but (as far as I remember) on Epilobium angustifolium.


The most common species on Rubus is L. virgineum - what do you think?


Best regards, Lothar


 

Rasmus Riis-Hansen, 16-05-2019 20:27
Rasmus Riis-Hansen
Re : Lachnum on Rubus Idaeus
Hi Lothar

Thanks for the comments!

A lot of the hairs does in fact have crystals on the top. Also the colour change when bruised is quite distinct and not present in L. virginum as far as i know.


Best regards
Rasmus
Hans-Otto Baral, 16-05-2019 20:40
Hans-Otto Baral
Re : Lachnum on Rubus Idaeus
Hi Rasmus & Lothar

I have a clavigerum folder for Rubus idaeus, with several samples (including HB 8585).

The spectrum of the species includes also Aruncus etc. I am not sure if there are any clear differences between the substrates, except for spore size:
9-11 x 2-2.5 on Rubus
6-9 x 1.7-2 on Epilobium/Aruncus

So perhaps two species?

Rasmus' description includes crystals. The colour change would point to VBs in the paraphyses and hairs, but for a species with crystals this is impossible. Actually, a yellowish-cream disc is not unusual in L. clavigerum.


Zotto