When: 2008-09-29

Collection location: Bela, Malonty, Southern Bohemia, Czech Republic [Click for map]

Who: Gerhard Koller (Gerhard)

No specimen available


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colors of porphyria…
By: R. E. Tulloss (ret)
2009-02-26 14:56:08 PST (-0800)

I wonder if you have ever seen porphyria with differently colored caps. In eastern N. Amer. we have something we call porphyria that looks very much like your photograph; but we also have an entity also called “porphyria” that has a somewhat virgate olive-brown cap. I have always thought it was another species, but it seems very close to the porphyry-capped entity. I have had the pleasure of looking at some of Schweinitz’s notebooks of watercolors at the Academy of Natural Sciences in Philadelphia. There is an undated portrait labeled “porphyria” that looks like the printed illustration of the species in the protolog, but is IN EVERY PART ONE MEDIUM SHADE OF GRAY. Schweinitz described the species as gray in one place and porphyry in another. I wonder what the mushroom in Schweinitz’s watercolor is. I’ve never seen an Amanita pigmented in that way. I considered the possibility of lead-based paints being converted to black by the lead’s becoming a sulfide; however, there is no evidence on any other page in the notebooks of a white stem becoming black in this manner.