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18-07-2016 13:44

Pascal RIBOLLET

Bonjour Forum,Je cherche cet article récent sur l

18-07-2016 08:09

Angel Pintos Angel Pintos

Good morning, anybidy have? KENDRICK, B., SAMUELS

17-07-2016 01:04

Malcolm  Greaves Malcolm Greaves

This single fruit body was found in the same woodl

16-07-2016 22:19

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos. Subo unas fotos de una Helvella que

17-07-2016 10:37

Elisabeth Stöckli

Bonjour,Trouvé sur feuilles mortes de Calluna vul

16-07-2016 17:16

Bernard CLESSE Bernard CLESSE

Sur terre argileuse lourde et humide dans un senti

11-07-2016 08:23

Castillo Joseba Castillo Joseba

He encontrado esta especie  en jardin, debajo de

15-07-2016 16:25

Patrice TANCHAUD

Bonjour,récolte sur un chemin en forêt, spores 1

15-07-2016 20:16

Angel Pintos Angel Pintos

Sobre tallo de platano puesto en camara humeda.per

14-07-2016 22:32

François Bartholomeeusen

Good evening forum members, The fruiting bodies w

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Nectria-like
Bernard Declercq, 03-07-2016 18:29
Bernard DeclercqHi,

Collected in October 1992 on decaying petioles of Petasites hybridus:
Perithecia superficial, gregarious, subglobose, flattened upper part, 0.3-0.4(0.5) mm diam., indistinct papillate, yellow-orange, with a crown of spreading, hyaline hairs.
Asci 8-spored, 73-83x9-10 µm.
Spores narrowly ellipsoid, 18-23(25)x5.5-7 µm, 1-septate, filled with 1-2 µm diam. guttules, smooth, hyaline.
Perithecial wall of textura angularis. Processes tapering, up to 115x13 µm, composed of agglutinated 2 µm diam. hyphae, hyaline.
Only a drawing available. Any idea? Thanks in advance.

  • message #43625
Christian Lechat, 03-07-2016 21:09
Christian Lechat
Re : Nectria-like
Hi Bernard,
Description of ascomatal wall, colour of perithecia in KOH as well as in lactic acid are required.
If there is no changing colour, you have choice among four genera:
Lasionectria, Lasionectriella, Ijuhya and Hydropisphaera, which are separated by characteristics of the cells composing the wall.
Did you see some orange, oily droplets in ascomatal wall or in hymenium?

Good luck
Christian