Collection location: Tahoe National Forest, California, USA [Click for map]
This was collected by someone else for the 17th Annual Yuba Watershed Fungus Foray and appears to be cespitose on on fallen coniferous needles. The taste was farinaceous, the images do not represent where these were found.
Spores with minute germ pore.
Spore range = 5 – 6 × 3 – 4 µm
Spore average = 5.35 × 3.28 µ
Q range = 1.38 – 2
Q average = 1.65
Lamellar cystidia sometimes slightly thick walled and yellowish.
Cheilocystidia measured = 20×14, 25×9, 26×10, 28×11, 29×11, 30×10, 30×11, 32×10, 32×12, 33×11, 38×13, 38×13 µ
Pleurocystidia measured = 32×11, 35×13, 36×10, 36×11, 37×11, 38×12, 38×12, 38×17, 39×10, 40×12, 40×13, 41×11, 41×11, 42×11, 45×11, 45×12, 48×12 µ
Using Smith’s Psathyrella monograph this keys out as P. alaskaensis which is described as a satellite taxon to P. hydrophilia (=P. piluliformis) with slightly thickened pleurocystidia that are yellowish in KOH, but it seems that Smith reached the wrong conclusion in thinking that was grounds for a new species and P. piluliformis is also known to have lamellar cystidia that are sometimes thickened and yellowish like this collection. The DNA sequence below thanks to Alan seems to support this.
Here are some sequences that are 100% matches.
#Psathyrella_piluliformis_gi334352354 FN396113 Unknown location
#Psathyrella_sp.TENN61767_gi223452211 FJ596872 USA: TN, Great Smoky Mountains National Park (from this paper)
#Psathyrella_piluliformis_gi334352377 FN396136 Unknown location (from this paper)
#Conocybe_appendiculata_gi344333553 JF908596 Italy (from this paper)
#Psathyrella_sp._MLB-2010bgi315270751 HQ604761 Pacific Northwest
|I’d Call It That||3.0||11.49||2||(Byrain,Alan Rockefeller)|
sum(score * weight) /
(total weight + 1)
Created: 2014-12-21 14:06:31 PST (-0800)
Last modified: 2014-12-21 22:16:49 PST (-0800)
Viewed: 89 times, last viewed: 2018-01-16 14:01:59 PST (-0800)