Collection location: Albion, Mendocino Co., California, USA [Click for map]
First time these were listed for the area, not sure why, I know I’ve found them up there before. Probably just didn’t get around to ID, since usually things like russula, corts and suillus are left to the end. These are genera that are easy to tell the genus, but more difficult to tell the species.
But subnigricans is the older name, and it is listed as such in Arora. Agaricales of CA lists these are R. eccentrica, and states they are a different species from the other R. subnigricans. They can be told from the usually off-center stipe, the bruising colors which goes very slowly (usually takes 30 mins to complete) to red, to red-brown, and then grey-brown (but not black). And in the older ones I can tell the odor, which is disgusting… much like vomit at times.
I created some fresh bruises on the right hand stipe in the photo, and waited 5-10 mins for the red-brown color to deepen for the photo. But then the stipe was in shadow, so it hard to get the color of the bruise from this photo. Oh well.
Ok, going with R. eccentrica on these, changed observation so it can get listed along with other eccentrica.