When: 2017-05-16

Collection location: Jenkinson Lake, El Dorado Co., California, USA [Click for map]

Who: Ron Pastorino (Ronpast)

No specimen available

Notes:
Growing on damp soil in mixed woods.
Fruitbody up to 1 cm wide with black hairs on fringe of cup margin.
Spores from a wash with Congo red and 2% KOH were ~ 23.8-27.5(29.0) X 17.0-18.0(18.9) microns, ellitical and minutely verrucose. Immature spores in asci appeared smaller, ~ 21-22 X 13-15 microns and somewhat multigluttulate. (see photos)
Paraphyses mostly with clavate tips.

Species Lists

Images

Paraphyses in Congo red + KOH @ 1000X

Proposed Names

16% (4)
Used references: Ascomycete Fungi of North America by M. Beug, Alan Bessette and Arleen Bessette
60% (2)
Recognized by sight

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= Observer’s choice
= Current consensus

Comments

Add Comment
Thanks for the comments Malcolm.
By: Ron Pastorino (Ronpast)
2017-05-19 01:14:41 CEST (+0200)

I don’t have any more material to work with but the spores do seem to be ornamented with low warts, which can be seen even with the faint Congo red staining. This does corresponded pretty well with the descriptions I’ve seen as well as the other features, including the relatively large spores.
I agree with S. kerguelensis as been a good possibility.

Not conclusive.
By: Malcolm (Flaxton)
2017-05-18 22:12:22 CEST (+0200)

I still think S kerguelensis is the most likely but the spore ornamentation in Cotton Blue would be needed to be sure.
Mal

I hadn’t vouchered these
By: Ron Pastorino (Ronpast)
2017-05-18 03:53:44 CEST (+0200)

but did salvage enough to do a little micro work which is new to me and therefore somewhat sketchy.
The hairs seem to be up to about 1 mm long and multiseptate.
I added 3 micro photos of roots of some hairs @ 400X. From what i could see they seemed to be either simple or bi-furcate.

Hair length
By: Malcolm (Flaxton)
2017-05-17 08:37:28 CEST (+0200)

We need a description of the root of the hairs and their length. If they have simple or occasionally bi-furcate roots and are in the range of <500µ I would suggest S. kerguelensis. If they are longer and have a more complex root then S olivascens is possible.

Created: 2017-05-17 04:55:20 CEST (+0200)
Last modified: 2017-05-22 01:07:22 CEST (+0200)
Viewed: 126 times, last viewed: 2019-08-13 00:27:46 CEST (+0200)
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