Amanita farinosa sensu Thiers - Amanitaceae.org - Taxonomy and Morphology of Amanita and Limacella
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name Amanita farinosa sensu Thiers
name status sensu
english name "Western American Floury Amanita"
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  • Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A.Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A.

    1. Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A.

  • Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A.Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A.

    2. Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A.

  • Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A.Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A.

    3. Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A.

  • Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A.Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A.

    4. Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A.

  • Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A.Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A.

    5. Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A.

  • Amanita farinosa sensu Thiers, Clatson Co., Oregon, U.S.A. (RET 508-2).Amanita farinosa sensu Thiers, Clatson Co., Oregon, U.S.A. (RET 508-2).

    6. Amanita farinosa sensu Thiers, Clatson Co., Oregon, U.S.A. (RET 508-2).

  • Amanita farinosa sensu Thiers, Clatson Co., Oregon, U.S.A. (RET 508-2).Amanita farinosa sensu Thiers, Clatson Co., Oregon, U.S.A. (RET 508-2).

    7. Amanita farinosa sensu Thiers, Clatson Co., Oregon, U.S.A. (RET 508-2).

  • Amanita farinosa sensu Thiers, Clatson Co., Oregon, U.S.A. (RET 508-2).Amanita farinosa sensu Thiers, Clatson Co., Oregon, U.S.A. (RET 508-2).

    8. Amanita farinosa sensu Thiers, Clatson Co., Oregon, U.S.A. (RET 508-2).

  • Amanita farinosa sensu Thiers, Clatson Co., Oregon, U.S.A. (RET 508-2).Amanita farinosa sensu Thiers, Clatson Co., Oregon, U.S.A. (RET 508-2).

    9. Amanita farinosa sensu Thiers, Clatson Co., Oregon, U.S.A. (RET 508-2).

    • intro This description is based on the annotations of collections sent to RET from the western coastal states of the U.S.
    cap The cap of A. farinosa sensu Thiers is 50 - 67 mm wide, usually uniformly gray, occasionally uniformly tan, and never darker over disk.  Its margin is barely striate in young material. The length of the striations becomes up to half the cap's radius in overmature material.  The volva is present as a somewhat uneven, powdery layer covering the entire cap surface; it is uniformly gray and is bound to the cap's skin by hyphae.
    gills The gills are narrowly adnate to adnate, close, white to whitish, and sometimes have brownish stains.  The short gills are truncate, of many different lengths, and plentiful.
    stem The stem is 55 - 60 × 10 - 18 mm and whitish; its bulb is subglobose to subclavate and sometimes vertically flattened.  The stem's flesh is white and hollow to stuffed.  There is never a ring on the stem. The volva is present at the stem's base in broken rows of small, pallid, powdery, warts and patches.
    odor/taste The odor is indistinct.
    spores The spores of this species measure (6.5-) 7.5–9.5 (-10.6) × (5.0–) 5.5–7.2 (–7.6) µm, the are broadly ellipsoid to ellipsoid (very infrequently subglobose or elongate) and inamyloid.  Whether there are clamps at the bases of basidia and how plentiful they are requires further observations.
    discussion The basidiome of this western entity is two to three times the size of the true A. farinosa of eastern North America and Central America; and the length of the marginal striations on the pileus is relatively short in the western "farinosa."  The spores are proportionately narrower in the western entity (but a larger sample should be checked).  Further distinctions between the taxa require (at least) microscopic observation of gill anatomy.
    brief editors RET

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