Observation 118008: Mollisia (Fr.) P. Karst.

When: 2012-11-25

Collection location: Tualatin Hills Nature Park, Beaverton, Washington Co., Oregon, USA [Click for map]

Who: Sava Krstic (sava)

No specimen available

Growing on a stump, under falling off bark. Caps less than 1 mm.

Asci tips amyloid. Spores appear dextrinoid; is that possible?

Spore size 5 × 3 microns, but no asci are open. All Mollisia spores I’m seeing in “Swiss Fungi” are significantly longer than 5 microns. (Leaving the collection in a wet chamber to mature.)

Asci ~45 microns long. Paraphyses look simple, 1 micron thick.

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Dextrinoid spores
By: Sava Krstic (sava)
2012-11-27 04:38:45 AST (-0400)

Martin, thanks for the link. I also found an article (“Mollisia in Macaronesia: an exercise in frustration” by Greenleaf & Korf) where they say “One of the collections from Madeira differs from any known species of the genus in having ascospores which are dextrinoid when mounted in I solutions”. (Haven’t read the article yet; the quote is from the abstract.)

Byrain, thanks for the suggestion. I know I should start posting on Ascofrance. :)

Try ascofrance.
By: Byrain
2012-11-26 22:17:08 AST (-0400)
A search for images of paraphyses on google
By: Martin Livezey (MLivezey)
2012-11-26 21:21:22 AST (-0400)

turned up one highly suspect image of amyloid / dextrinoid variation from barron’s website, but the issue is not directly addressed.


Created: 2012-11-26 04:59:21 AST (-0400)
Last modified: 2012-11-26 05:01:49 AST (-0400)
Viewed: 51 times, last viewed: 2017-06-14 12:18:05 AST (-0400)
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