When: 2017-03-27

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

35.5228°N 121.0644°W 207m [Click for map]

Who: J-Dar

Specimen available

On planted Monterey Cypress (Hesperocyparis macrocarpa), dead branches, in a coastal grassland setting.

Thallus thin, continuous, whitish-green, K+Y. Apothecia biatorine, flat becoming convex, dark purple brown to black, somewhat pie-bald. Hymenium hyaline, hypothecium pale yellow and K+ intensifying, epihymenium dark brown from paraphyses apical caps, K+violet.

Spores 8/ascus, asci K/I+blue, fading to just the tholus. Spores hyaline, acicular with one end blunt,(5) 7-13+ septate (estimate), not breaking apart. Average size 38.5×3.0 (n=4)


100x in water
100x in KOH. Note purplish epihymenium reaction
Multi-septate spore
K/I stain showing blue tholus
100x in water
100x cross polarized (POL)
Exciple in water, 400x
Apothecial section in KOH, 100x
Exciple in KOH, 400x
Exciple showing outermost enlarged cells, 400x

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Add Comment
Congratulations, J-Dar, for this nice observation.
By: zaca
2019-03-09 19:01:41 CST (-0500)
By: Jason Hollinger (jason)
2019-03-09 14:16:51 CST (-0500)
Updated review, same ID
By: J-Dar
2019-03-09 14:14:26 CST (-0500)

3/1/19: Thallus smooth, white, K+Y confirmed, but faint (not previously recorded from West Coast NA, but typical for East Coast). Epihymenium black, POL-. Exciple lateral interior with brown coloration. Proper exciple width 70µm. Exciple with radiating hyphae, rim with enlarged cells, probably 1-2 cell layers. Fine white POL+ crystals in outer exciple extending down through medullary part. Hymenium with a dingy yellow brown color, K+Purple, 75µm tall. Hypothecium pale yellow, strongly intensifying in K. Paraphyses caps dark with epithecial pigments.

Still holding ID at Bacidia heterochroa. The K+P hymenium narrows the possibilities.

It leaves us with a complex genus
By: Jason Hollinger (jason)
2017-06-09 15:24:28 CDT (-0400)

where many of the ids reported are probably incorrect. To say nothing of our own ids!

Anything which grows on both coasts is suspect to me. It just means that there aren’t enough differences to responsibly describe them as separate species. Certainly not that they really are the same thing. Add to it that most lichenologists tend to pick a coast and stick to it, so few people are regularly seeing both things in the wild. It might be a while before any convincing conclusion is reached.

Interesting specimen
By: J-Dar
2017-06-09 09:56:46 CDT (-0400)

There are a dozen or more records on the west coast of B. heterochroa confirmed by Ekman, mostly Bay area and Santa Barbara to Los Angeles, including the Channel Islands. I didn’t see any others from Cypress, mostly Quercus, Baccharis and Umbellularia. This is the first record in the central coast area on CNALH, but I’ll check with Knudsen, he has collected extensively in this area. Surprisingly he has few Bacidia collections up here, one is B. coruscans,but that species has a distinct blue-green K- epihymenium.

B. heterochroa on the west coast is supposed to be K-, while on the east coast it has atranorin and tests K+Y. This specimen is K+Y, so no sure where that leaves us.

Didn’t realize this was on the west coast, too
By: Jason Hollinger (jason)
2017-06-08 23:33:52 CDT (-0400)

Often grows on Cupressaceae on the east coast, too!

Created: 2017-06-08 23:22:04 CDT (-0400)
Last modified: 2019-03-09 19:01:42 CST (-0500)
Viewed: 85 times, last viewed: 2019-04-10 18:32:05 CDT (-0400)
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