Amanita sp-M15 - Amanitaceae.org - Taxonomy and Morphology of Amanita and Limacella
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name Amanita sp-M15
name status cryptonomen temporarium
author Tulloss et al.
images

  • 1. Amanita sp-M15, Mpio. Tlaxco, Tlaxcala edo., México.

    • intro The following material is based on original research by R.E. Tulloss.
    cap The orange-brown to brown cap is up to 75 mm wide and is darkest over the center.  The distribution of pigment over the cap suggests fine radial hairs.  The cap is convex with a distinct rounded knob in the center depression.  The cap's flesh is white with darker lines above the gills.  The cap is 4 mm thick over the stem, thins evenly for more than half of its radius, and then is membranous to its edge.  The edge is striate.  No volval remnants are present.
    gills The pale cream gills are free and up to 8.5 mm broad.  The short gills are cut off squarely or somewhat rounded, are unevenly distributed, and are of diverse lengths.
    stem The off-white stem is up to 161 x 11.5 mm and can become faintly brown from handling.  The stem narrows upward and flares at the top.  It is almost satiny at its top and has fine fibers near its bottom.  The stem's flesh is off-white except where it is darker at the bottom above the base.  The stem is hollow with a central cylinder 4.5 mm wide that is lined with wispy white fibers.  The volva is sac-like and membranous; its surface and interior are soft and white.  The volva is 57 x 21 mm and up to 1+ mm thick.  A small internal limb is present at the point of the volva's attachment to the stipe.
    odor/taste This mushroom's odor is indistinct.  It's taste was not recorded.
    spores t.b.d.
    discussion This species was found growing singly at 2800 m elevation in the dark loam of a mixed forest dominated by multiple species of Oak (Quercus), Mexican Weeping Pine (Pinus patula), Sacred Fir (Abies religiosa), a groundsel-like shrub in the Aster family (Baccharis conferta), and the Texas Madrone (Arbutus xalapensis).

    This species has also been called "Amanita species M24" by RET in species lists and draft keys.—R. E. Tulloss and N. Goldman
    brief editors RET

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