Collection location: near Diamond and Crater Lakes, Douglas and Klamath Cos., Oregon, USA [Click for map]
These were very purple, more of a pure iridescent purple then I’ve seen in another Russula. Although they did have green tones in the central disk. They had a mild taste, and yellow spores, which you could see in the older ones. The posed photo was taken 24 hours later, and brown stains are seen on the stipe.
I was able to look at the spores under the scope, and they had “medium” sized warts, with partial reticulation, and somewhat ellipsoid. (Gotta love the vague spore measurements here… don’t look at the waving hands… I’ll get better at measuring spores — I couldn’t get worse.)
Using all this, it actually gets to kinda a list of species, purple-capped yellow-spored mild-tasting russulas. But, taking acount the size, these best fit R. turci or R. amethystina in Theirs’ Russula of CA. He states that R. turci doesn’t produce stains on the stipe, and R. amethystina does. He also states, they can be clearly separated by an iodoform odor in the base (whatever that is, sorry didn’t keep that in mind here…), and then goes on to say that the odor can be weak to apparently absent, so, great.
And to get worse, the new russula monograph from Vancouver Island states that R. turci does produce yellow to brown stains on the stipe. Also Theirs says he didn’t actually see any R. amethystina in his study, but was siting this species from previous works.
So, there you have it, this is the best I got on this one, probably this species, but could also be R. turci.