Collection location: Santa Rosa, Sonoma Co., California, USA [Click for map]
I was flummoxed by this until I saw Darvin’s observation (5970) this morning. Although this doesn’t look much like those he saw, it does fit the descriptions in Arora and online. And it explains the dull yellow brown spore print. Fruiting under live oak. Pileus 6.6cm, stipe 1.1cm, total height 5.8cm.
Apparently still flummoxed.
It should be radish-like. The large Hebelomas are confusing to me. According to the Swiss books H. crustiliniforme and H. sinapizans are very hard to tell apart. One of the key features they list for H. sinapizans is the presence of a descending cone inside the otherwise hollow stipe. In the collection I made the other day, I found this feature in a reasonable percentage of the specimens. The photos here (and Darvin’s) appear to be quite distinct from H. crustiliniforme. I’d be really curious to see what the inside of the stipe looks like.