18-07-2016 13:44
Pascal RIBOLLETBonjour Forum,Je cherche cet article récent sur l
17-07-2016 01:04
Malcolm Greaves
This single fruit body was found in the same woodl
16-07-2016 22:19
Rubén Martínez-Gil
Hola a todos. Subo unas fotos de una Helvella que
17-07-2016 10:37
Elisabeth StöckliBonjour,Trouvé sur feuilles mortes de Calluna vul
16-07-2016 17:16
Bernard CLESSE
Sur terre argileuse lourde et humide dans un senti
15-07-2016 16:25
Patrice TANCHAUDBonjour,récolte sur un chemin en forêt, spores 1
14-07-2016 22:32
François BartholomeeusenGood evening forum members, The fruiting bodies w
Hi,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.
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