Observation 4218: Agaricus L.

When: 2007-09-23

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

Who: Jason Hollinger (jason)

No specimen available

In lawn. Cap ~8 cm, stem ~8 × 2 cm. Skirt-like annulus. Distinct rufescent stain when cut, esp. in flesh just above gills. Mostly K- except weak K+y/o on cuticle. Spores 6-8 × 5-6 um. Full notes here. This mushroom defies my attempts to ID.

Species Lists


Proposed Names

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
Agaricus bernardii?
By: Nathan Wilson (nathan)
2007-10-05 13:09:20 CST (+0800)

That’s the common red-staining lawn Agaricus in southern California. It has a distinctive briny odor. My next door neighbor’s lawn has a fairy ring fruiting this week. I’ll upload some images over the weekend.