Observation 72413: Glonium stellatum

When: 2011-07-21

Collection location: Blackstone, Massachusetts, USA [Click for map]

Who: Jason Karakehian (Jason Karakehian)

Specimen available

This fungus starts off a small roundish patches of radiating carbonaceous hysteriothecia on a coarsely woolly black subiculum. The fruiting bodies grow and extend over a larger area, becoming confluent and creating crustlike patches many centimeters in extent. I saw a rotten old one on an oak log that was more than ten cm in length. I’ve found it two times now and both were on rotted oak.


This chunk is about 2.5 cm long.
Note that lovely black subiculum!
Intact bitunicate ascus with ascospores in a water mount
Intact bitunicate ascus in congo red.
Two ascospores in congo red
Ruptured bitunicate ascus in congo red
Another ruptured bitunicate ascus. Note the conspicuous bulge where the inflexible outer ascus (ectoascus) constricts the burgeoning, flexible endoascus from which the spores will be liberated.

Proposed Names

80% (1)
Eye3 Eyes3
Used references: http://www.eboehm.com/glonium.html
Eric Boehm’s hysteriothecial fungi website
Based on microscopic features: Bitunicate asci. 8-spored, cylindrical with shortish stipe. Mine average a little larger than what’s listed in the descriptions but who’s counting microns? What!?
Ascospores average 26.5 × 7 micrometers. Hyaline.

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
never saw the web link
By: damon brunette (damonbrunette)
2012-08-09 09:44:13 CST (+0800)

for this before. Thanks Jason….

Created: 2011-07-22 05:00:54 CST (+0800)
Last modified: 2011-07-22 07:53:46 CST (+0800)
Viewed: 199 times, last viewed: 2018-01-28 21:37:52 CST (+0800)
Show Log