When: 2017-03-15

Collection location: Santa Barbara Co., California, USA [Click for map]

Who: J-Dar

Specimen available

Coast live oak (Quercus agrifolia) woodland near the coast in northwestern Santa Barbara County.

Thallus thin, grey, continuous, K-, C-. Epihymenium brown, hymenium hyaline, hypothecium reddish brown. Exciple dark, thick. Ascus tholus K/I blue.

Hyaline, narrowly ellipsoid, 3-5(+?) septate, narrower on one end. 23.8×3.2, 20.0×3.0, 19.2×4.2, 23.5×3.9

Difficult group, and a new one for me, so I’ll need to spend some more time with this one.


100x in water
400x in water, detail of exciple
Spores at 400x in water
100x in K/I stain (Lugol’s)
400x in water (cropped), K/I+ tholus

Proposed Names

28% (1)
Recognized by sight
57% (1)
Based on microscopic features: Spores fit well

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= Observer’s choice
= Current consensus


Add Comment
Good job — another closet trentepolioid crust!
By: Jason Hollinger (jason)
2017-06-28 08:47:53 CDT (-0500)