Identification: Oregon White Truffle, Questionable Stropharia and Shaggy Parasol?

My mother picked some Questionable Stropharia for me to identify when she went on a recent trip to the oregon coast. In all my resources it does not recommend them but also does not suggest they are toxic. i found one article online suggesting they were delicious when eaten in small quantities. Anyone familiar with the edibility of this species?

Also I think i may have stumbled upon my first Oregon White truffles under a pine tree in a wal*mart parking lot. the tubers where buried under the ground but slightly dug up and they had a very pungent (almost overbearing) oder of garlic. my only confusion is they are rather large and abundant and seemed much wartier than all my reference pictures. can anyone else verify a correct identification of this fungus?

Also I believe these are shaggy parasols that my mother also found. they have white gills and a definite ring, also a bulbous bottom which makes me hesitant to sample them orally.

 

I've never seen Pisolithus tinctorius IRL, but something about the lumpiness of your specimen makes me think of this.

There's a photo in this thread - http://www.botanicalgarden.ubc.ca/forums/showthread.php?t=43641&highlight=Pisolithus+tinctorius

and on this website http://botit.botany.wisc.edu/toms_fungi/jun2003.html

There is an excellent truffle book out recently, which may be helpful to you if you are interested in truffles:
Field Guide to North American Truffles: Hunting, Identifying, and Enjoying the World’s Most Prized Fungi by Matt Trappe, Frank Evans, and James Trappe. Published 2007 $17
Ten Speed Press, Berkeley

cheers,
frog