Accès membres

Mot de passe perdu? S'inscrire

19-06-2018 21:45

BERNARD CLESSE BERNARD CLESSE

Bonsoir à toutes et tous, Je n'arrive pas à voi

18-06-2018 04:55

Andgelo Mombert

Bonsoir,Sur tige morte de Gentiana lutea, en compa

19-06-2018 09:47

Greiff Georges

Hi all, I encountered this yesterday and think it

19-06-2018 09:34

Greiff Georges

Found on rotting twigs in wet woodland. Fruits wh

18-06-2018 19:50

Elisabeth Stöckli

Bonsoir, Trouvé sur feuille de Rubus (à 965m, R

18-06-2018 13:54

Castillo Joseba Castillo Joseba

Esta posible Peziza en bosque de  piceas,  sobre

18-06-2018 13:56

Castillo Joseba Castillo Joseba

en bosque de abetos,  sobre tierra   ...  A v

11-06-2018 20:34

Andgelo Mombert

Bonsoir,Sur tige morte de plante, probablement d'A

18-05-2018 18:38

Riet van Oosten Riet van Oosten

Hello,Found 17-05-2018, The Netherlands.On: Phragm

17-06-2018 00:36

Alan Rockefeller Alan Rockefeller

Looks like what is passing for Caloscypha fulgens

« < 1 2 3 4 5 > »
Scutellinia sp.
Claude Kaufholtz-Couture, 09-01-2018 21:08
Claude Kaufholtz-CoutureBonsoir à vous tous !

Je repasse, dans la clé de Schumacher (The genus Scutellinia (Pyronemataceae) ; Opera Botanica 101, Copenhagen, 1990, Printed in Denmark by AiO print Ltd., Odense), une collection (cKc0647) initialement déterminée « Scutellinia torrentis ». Avec l'aide de Nicolas et de Bernard, je constate que ce n'est pas le cas ; et je les en remercie.

Macro
Apothécie : 2-8 (9) mm Ø, orange à orange-rougeâtre, sessile, distinctement disciforme, extérieur revêtu de poils raides, brunâtres à noirs
Face externe : couverte modérément à généreusement de poils bruns noirs, bordant la marge comme des cils
Hyménophore : lisse, rouge à rouge vif, orangé


Micro
a) Ascospores ellipsoïdes à étroitement ellipsoïdes, de verruqueuse à pustulo-crêtées, à tuberculeuse, ornées de petits verrues (tubercules) arrondies 0,5-1,0 µm de haut, à contenu pluriguttulé, sans paroi externe détendue lorsque chauffée dans le bleu Coton lactique
(15,1) 15,2-16,7 (16,8) × (8,5) 9,2-10,4 (11,4) µm
Q = (1,4) 1,5-1,76 (1,8); N = 25
Me = 16 × 9,7 µm; Qe = 1,6
(Piximètre, formule classique; mesures issues d'une sporée, dans bleu Coton lactique
b) Paraphyses : surpassant de 12,5-30 µm les asques en moyenne, spatulées à longuement claviformes, septées, avec contenu granulaire hyalin dans l'eau glycérinée 15%, 210-230 x 5-8 µm en moyenne
c) Asques : longuement cylindriques, octosporés, unisériés, iodonégatifs, 190-275 × 12-15 µm en moyenne
d) Poils marginaux : bruns, aigus, entre 5 et 12 septa, flexueux, s'atténuant légèrement vers la base, majoritairement bifourchue, parfois trifourchue 200-±>700 x 17-20 µm
e) Biotopes : pousse sur écorce de feuillus en décomposition (Fagus)


Je vous remercie,


Claude

  • message #51855
  • message #51855
  • message #51855
  • message #51855
  • message #51855
  • message #51855
Malcolm Greaves, 10-01-2018 13:19
Malcolm  Greaves
Re : Scutellinia sp.
Hello Claude
The spores are quite small which limits the number of species but does fit with S vitreola. The ornamentation is about right and the length and rooting of the hairs is close. It is not a species I have seen but check out Schumachers description.
Mal

Claude Kaufholtz-Couture, 10-01-2018 21:50
Claude Kaufholtz-Couture
Re : Scutellinia sp.
Hello Malcolm,

I reread the description of S. vitreola in Schumacher's key, and I agree with you, the elements are quite similar as well as the measurements. On page 71 of Schumacher's article, the ascospores of S. vitreola are well represented, and I find a certain resemblance to that of my collection.


Is the thickness of the hair wall (hair base) important here? My collection is 4-6 ?m thick. However, it would have been better for me to study this collection on the fee; I will therefore resume in the future. Which also explains why I did not study the excipulum.


Would it be more prudent to name this collection (cKc0647) Scutellinia group vitreola, provisionally? What is the standard to follow?

Best,
Claude

Malcolm Greaves, 11-01-2018 00:35
Malcolm  Greaves
Re : Scutellinia sp.
Claude
Although Schumacher has the hair wall as 3.5-5 I think yours are close enough.
I would say the spore shape size and ornamentation along with the hair size and root structure are far more important so I feel there are no other species that are a better fit than S vitreola.
I would be happy to record it as S vitreola but others may disagree, I find with this wonderful group that specimens often have features which are not quite the perfect match we would like so without resorting to DNA it is often necessary to choose the best fit.
Mal
PS you could try this provisional interactive key http://myfg.org.uk/tombiovis/tombiovis-1.3.2/scutellinia.html
Claude Kaufholtz-Couture, 11-01-2018 15:36
Claude Kaufholtz-Couture
Re : Scutellinia sp.
Malcolm,

I fully understand your point of view and I share it. Sometimes I tend to want to stick to the description of the monograph too much; but we are studying the living, so to notice discrepancies is quite normal, within the limits of the possible. Just like you, I give the name S. vitreola; and I thank you for your help. In addition, I find the interactive key very successful; a beautiful design and very well designed.


Best


Claude