Bill Y identified it last year. This year I noticed how similar the stalk texture is to Xanthoconium separans.
It is attacked by a similar if not identical white worms that bore through the stem into the cap. You got to get these young if you want to beat the worms :o)
Arrived about a week later then last year. It was everywhere at the Grafton site. It's edibility is rated as "unknown". I got enough today to do a taste test. Will let you know later.
Fresh young Siamese twins.
Here is an older specimen.