Observation 68581: Inocybe sensu lato (Site ID) (Inocybaceae)

When: 2011-06-01

Collection location: Jenkinson Lake, El Dorado Co., California, USA [Click for map]

Who: Ron Pastorino (Ronpast)

Specimen available

These were growing on and along a fairly bare trail near mixed conifers.
The caps were up to 3.5 cm across.
The spore print was brown and the spores were elongated nodulose, some appearing rocket shaped in one aspect. They were ~ 10.1-13.0 X 6.3-8.5 microns.
Caps were rather scruffy and difficult to clean.
Inocybe sierraensis is a guess in that I couldn’t find a detailed description for it except for the general shape of the spores and the fact that it is a vernal montane species.

Checked the cystidia and the Kroop and Matheny reference. Inocybe chelanensis is a better fit based on the spores which have more nodules than I. sierraensis and the cheiliocystidia which are shorter and more oval in the I. chelanensis.


Proposed Names

17% (2)
Used references: Kropp and Matheny, Mycologia96(2), 2004; Basidiospore homoplasy and variation in the Inocybe chelanensis group in North America.
57% (1)
Based on microscopic features: Nodulose spores don’t look like other Inocybe chelanensis observations

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= Observer’s choice
= Current consensus


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