For additional information about this specimen, please contact: Carol Ann McCormick, Herbarium Curatrix (mccormick@unc.edu)
bungartzposted 2019-11-20 15:43:35
Caloplaca holocarpa according to Wetmore (2007; Sonoran Flora) grows on wood; this most likely is Caloplaca (Xanthocarpia) feracissima.
gbperlmutterposted 2019-12-14 15:01:47
It keys to Caloplaca (Athallia) holocarpa in Brodo (2016) based on a wide spore septum; C. feracissima has a narrow septum. This is consistent among all specimens I have encountered in eastern N. America. I can send you material if you would like to look at it.