Collection location: Madison Heights, Pasadena, California, USA [Click for map]
GEN medium mushroom, large number scattered in a lawn under Quercus agrifolia, mild odor, no taste, all mishapen
ST: ~30×15mm, straight, solid, firm like cap, smooth, white, brittle
CAP: 70-90mm, contorted and convex, smooth, pale yellowish to brownish, darker in center, conspicuously dirty (implying stickiness at some earlier stage)
FLESH: white, Russula-textured, firm, unchanging
GILL: whitish, brittle, somewhat close
SPORE: print white to v sl creamy (compared to truly white print), round to sl ellip, low amyloid spines and some short ridges, 6.3-7.9×5.6-6.6um
NOTES: More notes here.
Using the ID Darvin suggested.