When: 2018-11-06

Collection location: Pozo, California, USA [Click for map]

35.3368°N 120.4022°W 457m [Click for map]

Who: J-Dar

Specimen available
Collection number: Jason Dart 1123

Notes:
On decomposing granite bedrock formation in mixed oak-pine woodland.

Pruinose scurfy dingy whitish crust on granitic sand, areoles discrete to conglomerated, margins often lifted, cortex K-. Apothecia rare, disk black, lightly pruinose. Epihymenium green, K+Brown. Paraphyses moniliform. Pycnidia present, punctiform black ostiole, usually raised on a small cone. Conidia filiform, mostly straight, average length 13.0µm (n=13), about 1µm wide or a little less.

Spores 8 per ascus, large, broadly ovate, hyaline. Average size 20.6 × 12.1µm (n=3).

Images

Apothecium section, 400x in water
Apothecium section, 400x in KOH
Paraphyses at 400x in KOH
Conidia at 400x in water. Scale bar is 25µm
Habitat

Proposed Names

76% (2)
Recognized by sight: On
Used references: Nash Sonoran Flora
Based on microscopic features: 8 spores; Moniliform paraphyses; Conidia a little on the short side
Based on chemical features: Spot tests negative

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= Observer’s choice
= Current consensus

Comments

Add Comment
Conidia vary a bit in Aspicilia
By: Jason Hollinger (jason)
2019-01-04 19:15:05 CET (+0100)

That’s okay. These are short, that’s all that matters, I think. [EDIT, sorry, 13µm is medium-sized, and I guess that’s what it’s supposed to be, my fault!]

Created: 2019-01-04 16:21:28 CET (+0100)
Last modified: 2019-01-04 19:15:06 CET (+0100)
Viewed: 21 times, last viewed: 2019-08-06 07:17:02 CEST (+0200)
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