When: 2009-12-04

Collection location: Tilden Regional Park, Contra Costa Co., California, USA [Click for map]

Who: Julia (julicab123)

Specimen available

The specimens bright color and shape made me think it was a Hygrocybe. After examining it under the scope, its very long basidia and parallel gill trama confirmed this genus. Its green color led to one of two choices, virescens or psittacina. The lime green tint, white at the base, and dry cap distinguished it from psittacina.

[admin – Sat Aug 14 02:06:47 +0000 2010]: Changed location name from ‘Tilden Park, Berkeley, Alameda Co. California, USA’ to ‘Tilden Regional Park, Contra Costa Co., California, USA’


The basidia
The gill trama

Proposed Names

89% (2)
Used references: Mushrooms Demystified by David Arora
Based on microscopic features

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= Observer’s choice
= Current consensus


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