Collection location: Madison Heights, Pasadena, California, USA [Click for map]
GEN: solitary, in lawn
ST: root like thing underneath
CAP: huge (20-30cm?), whitish, smooth with v thin faint brownish areoles, rind 2mm thick & white, not bruising, K-
FLESH: spongy, livid whitish, turning brown, featureless
SPORE: clear, smooth to v weakly textured, ellip to round, knobbed, 4.3-4.9×3.4-3.9um
Seems fairly clear ID, but since the gardener had the nerve to chuck it in the trash bin before it fully matured, I don’t have all the observations I should.
Darvin has pointed out that, alas!, Arora’s guide is not to be trusted in this case. Actually, to be fair, he told me only to trust Arora in the Santa Cruz area! So C. booniana it is: warts, spore size, and spore “pedicels” (whatever those are). And furthermore, just in case there were any doubt left, he reports that he’s never seen a valid record of C. gigantea west of the Rockies. So there.