Observation 63720: Scytinostroma Donk
When: 2011-02-12
(38.0527° -122.8147° )
Herbarium specimen reported

Notes: This is the third collection of this striking yellow resupinate from Pt. Reyes, and I have also collected it from Salt Pt. Identification for the first two collections was made by Hal Burdshall. At the time we called it Syntinostroma aff. odoratum. The generic identification is based on the distinctive dextrinoid skeletal hyphae. The species ID was due primarily do to the lack of clamp connections and the spore size. In looking more closely at the description of odoratum the color of our material seems too yellow, as S. odoratum is supposed to be cream colored to “yellow ochraceous”. The spores of our material are also a bit too fat, 8.6-10.1 X 5.8-6.4 vs. 7-9 X 3.5-5 for odoratum and a bit too short for S. ochraleucum (10-14 X 5-8), which is also not described as this yellow. I think it might be closer to this latter species through, based on the cystidia. There are some species described from North America that I have not checked yet. In any case this is one of the few resupinates at Point Reyes, that is easily identified in the field due to its bright color.

This collection was from wet, well rotted, bay laurel wood. The previous collections were all from pine wood, but If I recall correctly it too was well rotted and rather wet. This feature of being associated with both hardwood and conifer wood is mentioned for several Scytinostroma species.

The herbarium collection will be UC 1860817, but is currently not deposited.

Species Lists

Images

135154
This is the fruiting body. The colors are pretty close to true. The white fringe is typical of the other collections I’ve seen too.
135151
These are the spores as seen in Meltzer’s
135152
These are the spores as seen in congo red (NH4) and washed with 3%KOH
135153
These are the dextrinoid skeletals in Meltzers. These are really abundant just below the hymenium.
135155
This the hymenial layer in phloxine. Note the abundant wavy, sometimes branched cystidia. The photo doesn’t show the the weird “schizopapillae” well, but they were present.

Proposed Names

83% (1)
Eye3 Eyes3
Used references: Hallenberg et al. 1985 Lachnocladiaceae of Northern Europe, & Berniccihia et al. 2010, Fungi Europaei Cortiaceae s.L.
Based on microscopic features: presence of thin-walled, thin, dextrinoid skeletal hypha

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2011-02-20 12:07:54 PST (-0800)
Last modified: 2011-02-20 12:19:50 PST (-0800)
Viewed: 48 times, last viewed: 2016-07-01 07:22:40 PDT (-0700)
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