Observation 67539: Caloplaca erythrocarpa
When: 2011-05-14
Who: zaca
No herbarium specimen

Notes: I suppose that this species of Caloplaca must be uncommon, since the websites that I use frequently to access a description of lichens don’t mention it. Even the CNALH page does not have a description or photos of it. However, it appears in Stridvall gallery with very nice photos. Another very nice photo of the species appears in flickr .
The white thallus of the species in contrast with the red/ferruginous apothecia is a distinctive character of this species. However, there was a point that make me delayed to have a proposal for the name of the species, which was the K+ rose reaction in thallus that I never saw in a Caloplaca and that is not referred in the page ac-lille, where I encountered a description of the species and some photos as well. The K+ purple reaction on apothecia is a characteristic of the genus.

Obs.: The name Caloplaca erythrocarpa does not appears in index fungorum. There is a Caloplaca erythrocarpia which is deprecated in favor of Caloplaca teicholyta, but this one is quite different from my specimen.

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May be bleeding …
By: zaca
2011-05-17 18:52:24 CDT (-0400)

is a good explanation. I will try to confirm or deny it in a forthcoming oportunity. Thanks, Jason.

May be bleeding
By: Jason Hollinger (jason)
2011-05-17 17:04:27 CDT (-0400)

I’d bet that the apparent “K+ rose” reaction in the thallus is the (very strong) K+ purple reaction from the apothecia bleeding onto the thallus surrounding. I bet if you could carefully test just the thallus you’d find different reaction.

Fascinating and striking species! The only other genera with K+ red/purple reaction like this are Haematomma (apothecia with thalline rims) and Ramboldia / Pyrrhospora (rim same color as disc). (Oh right, and Ophioparma.)

Created: 2011-05-17 15:35:43 CDT (-0400)
Last modified: 2011-05-17 16:55:52 CDT (-0400)
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