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28-09-2017 05:06

Hysterium hyalinum
Ethan Crenson

Collected recently in Vermont in the Green Mountai

27-09-2017 22:36

en petits bouquets Holwaya mucida
Lefèvre Lefèvre Lefèvre Lefèvre

Bonsoir à tousEn forêt de feuillus ( Hainaut Pic

26-09-2017 18:16

Rhytihysteron
Andrew N. Miller Andrew N. Miller

Does anyone know of a key to species of Rhytihyste

27-09-2017 12:52

Tympanidaceae project - Luis Quijada (postdoc Harvard Herbarium)
Quijada Luis

Hi all, some of you have been contacted directly

13-09-2017 18:04

literature request
Angel Pintos Angel Pintos

Hello, someone has any of the following items?Api

27-09-2017 06:52

Ascobolus ? on bear dung
Ethan Crenson

I have almost no experience with coprophilous fung

27-09-2017 02:15

Diatrypaceae - Wisconsin, USA
Danny Newman Danny Newman

collected in the fine foraying company of Dr. Pete

26-09-2017 20:40

unknown discomycete from Peru
Danny Newman Danny Newman

Substrate: small twig >1 cm in diam.Habitat: fo

26-09-2017 22:00

Typan Blue
Danny Newman Danny Newman

is 0.05% Lactophenol Trypan Blue sufficient to obs

25-09-2017 18:34

Sur ronce - Rubus
Patrice TANCHAUD

Bonsoir,spores 16-18 x 4-5 µm.Merci d'avance pour

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Hysterium hyalinum
Ethan Crenson, 28-09-2017 05:06
Collected recently in Vermont in the Green Mountains.  I believe this is Hysterium hyalinum.  It is on a decorticated hardwood branch (along with Berkleasmium conglobatum and a Patellarioid asco which I posted earlier.)  Long naviculate hysterothecia with an apical slit.  They are mostly flattened at the apex.  The longest of them are 2-2.5mm long and slightly less than .5mm wide.

Spores are hyaline at first and eventually brown. Mostly 3 septate, constricted at the sepatations.  20-25 x 7.5-9µm. 

Asci are 92-110 x 15-17µm. 

This seemed to key out to H. hyalinum using Boehm's key and matched fairly well with information from Marion Lohman, "A Cultural and Taxonomic Study of Hysterium hyalinum". 
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Hans-Otto Baral, 28-09-2017 07:57
Hans-Otto Baral
Re : Hysterium hyalinum
The name hyalinum could refer to the spores beeing obviously shot when still hyaline, judging from the living, seemingly mature asci on your photos. In your Haematomyxa this is unclear as you did not see living asci, while in my collection the spores were faintly coloured when still inside the living asci.