Accès membres

Mot de passe perdu? S'inscrire

21-08-2019 20:42

Simon Kennedy

As the historical records are no longer available

21-08-2019 17:04

Mirek Gryc

Hello Grew among the roots of Phragmites.Fruitbod

21-08-2019 20:49

Joop van der Lee

I am looking for the following documentsMuroi, T.

21-08-2019 08:29

Tanja Böhning Tanja Böhning

Bonjour,   Encore un asco, que m´interesse, ma

20-08-2019 17:18

Josep Torres Josep Torres

Hola.Una roña hilosa por debajo de un tronco de P

19-08-2019 22:48

Zuzana Egertova Zuzana Egertova

Hello,I would like to consult this inoperculate as

18-08-2019 22:42

Elisabeth Stöckli

Bonsoir, Trouvé sur tiges mortes de Pulsatilla a

19-08-2019 07:40

Josep Torres Josep Torres

Hola.Un liquen fotografiado sobre la corteza de un

18-08-2019 01:12

Andreas Gminder Andreas Gminder

Bonjour,although there are already several threads

16-08-2019 16:19

Joop van der Lee

I am looking for the following documentation:LUCK-

« < 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