Observation 218640: Amanita calyptroderma G.F. Atk. & V.G. Ballen

When: 2015-10-11

Collection location: Angelo Reserve, Mendocino Co., California, USA [Click for map]

39.7463° -123.6102° 711m

Who: Brian Bowers (bbowers)

No specimen available

Habitat notes: Growing out of dry, scrabbly soil in mixed coniferous-broadleaf (Coast Redwood, Black Oak, Bay Laurel, Madrone) forest

Key characters used to ID: Large, light-orange cap partially covered by a thick patch of universal veil; white gills and white spore-print; Cream-colored stalk with partial veil; large, sacklike volva at the base of the stalk. Microscopic characters: “Spores (8–) 9–12 × (5–) 6–7 μm, ellipsoid to elongate, smooth, hyaline, inamyloid” (Desjardin and Wood, 2015).


Amanita calyptroderma
Amanita calyptroderma spores in Melzer’s reagent [40× objective lens × 10× optical lens = 400× total magnification]

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Created: 2015-10-12 13:40:56 PDT (-0700)
Last modified: 2015-10-13 22:21:58 PDT (-0700)
Viewed: 36 times, last viewed: 2017-07-29 16:29:18 PDT (-0700)
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