Observation 220369: Caloplaca holocarpa group

When: 2015-10-23

Collection location: San Simeon, California, USA [Click for map]

35.628° -121.0846° 203m

Who: J-Dar

Specimen available

Live oak woodland habitat along Van Gordon Creek. Substrate is California Bay (Umbellularia californica) bark. This species is frequent in the area, but the specimen photographed here was the only one that was this well-developed, most are a few apothecia on a small chunk of thallus squeezed in by various ssp. of Pertusaria and Lecanora.

Thallus thin, light grey with greenish (maybe another lichen over top?), continuous to rimose, without prothallus, K-. Apothecia abundant and tightly packed in central portion with younger ones on outer edge; flat to convex in age, thalline margin orangish to lighter orange than disk, reducing in age to more or less biatorine appearance. Disk and margin K+R. Amphithecium orangish, not grey or brown. Algal cells generally continuous across bottom of apothecia and into margins.

I’ll get a micro workup on this next week and update the observation. For now, I put it in C. holocarpa group. Could be C. pyracea or C. stanfordensis_ or ?


Note greenish cast on thallus. Seems to be a dust lichen or something on top of the grey Caloplaca thallus.
Natural light
With flash
Habitat. Coast live oak woodland with California Bay.

Proposed Names

28% (1)
Eye3 Eyes3
Recognized by sight

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
No one has commented yet.

Created: 2015-10-24 11:16:09 CDT (-0400)
Last modified: 2015-10-24 11:18:59 CDT (-0400)
Viewed: 38 times, last viewed: 2018-06-19 06:15:50 CDT (-0400)
Show Log