When: 2016-02-08

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

35.4514°N 120.6437°W 282m [Click for map]

Who: J-Dar

Specimen available

Notes:
This tiny Buellia is abundant on branches of a planted Deodor Cedar (Cedrus deodara).

Thallus yellowish green, rimose areolate to continuous, C-, K- (as best I could tell). Apothecia lecideine, small, black, plane, with a raised margin, becoming convex. Hymenium not inspersed with oil droplets.

Spores 8/ascus, 1-septate, brown, broadly ellipsoid. Measurements:
12.5×6.5µm
10.8×6.1µm
10.0×5.3µm
11.9×6.5µm
11.3×6.0µm
10.6×7.3µm (no septa)
10.4×5.8µm
Ave: 11.1 × 6.2µm

Images

Apothecial section showing thin black exciple
Buellia-type spores

Proposed Names

28% (1)
Recognized by sight
57% (1)
Based on microscopic features: Spores not conspicuously constricted in age, and are not microrugulate
Based on chemical features: Negative spot tests

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= Observer’s choice
= Current consensus

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