When: 2007-10-14

Collection location: Madison Heights, Pasadena, California, USA [Click for map]

Who: Jason Hollinger (jason)

No specimen available

GEN: tiny mushrooms, scattered, in straw mulch at edge of and in well-manured lawn, indistinctive odor
ST: 20-30×1.5-4mm, watery offwhite to buff, min white appress hairy to rather cottony at base, hollow, doesn’t break when bent, creased lengthwise on one, exudes mulky latex when cut
CAP: 10-30mm, domed to broadly convex, lustrous from minute hairs when young but aging dull, rich medium reddish brown fading a bit toward margin, margin a bit tattered w sharp white edge in some young ones, translucent striations, flesh brownish, very slippery esp when moist/fresh
VEIL: none
GILL: attached, somewhat distant, quite thick at base (to 1mm), whitish but blushing brownish inside when young, hyphae parallel, cystidia?
SPORE: whitish to v pale yellow, ellip, smooth to faintly textured, one bubble inside, apiculate, 8.5-9.5×5.6-6.5um, sticking together in irreg towering masses when dry

Arora’s Mycena key has defeated me yet again. Is it the brick-red unidentified species in grass that he talks about? Does the milky exudate visible in second photo count toward M. galopus? Is the thing sticking out of the gill in the forth photo a cystidium or some hyphal cell dislodged from the interior by my razor? Is it slippery enough to be M. rorida or M. vulgaris?? Arg!!

Species Lists


1000x, in water, marks are microns, reading 2.5% too large.
Is that a cystidium? Mounted in water, at 1000x, marks are microns, reading 2.5% too large.

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Add Comment
Might be the Mysterious Lawn Mycena of LA County
By: Nathan Wilson (nathan)
2007-10-14 21:11:47 PDT (-0700)

Looks similar to Observation 195 which Dennis Desjardin said would fall into the current (as of ~2001) concept of Mycena pura (which now goes by the name Prunulus purus). I believe Brian Perry is currently working on Mycena s.l. in California so hopefully we can some clarity sometime soon.