Amanita rubrovolvata - Amanitaceae.org - Taxonomy and Morphology of Amanita and Limacella
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name Amanita rubrovolvata
name status nomen acceptum
author S. Imai
english name "Red Volva Amanita"
images
  • Amanita rubrovolvata, Yunnan Prov., China.Amanita rubrovolvata, Yunnan Prov., China.

    1. Amanita rubrovolvata, Yunnan Prov., China.

  • Amanita rubrovolvata, Uttarakhand, India.Amanita rubrovolvata, Uttarakhand, India.

    2. Amanita rubrovolvata, Uttarakhand, India.

  • Amanita rubrovolvata, Uttarakhand, India.Amanita rubrovolvata, Uttarakhand, India.

    3. Amanita rubrovolvata, Uttarakhand, India.

  • intro

    Fruiting bodies of Amanita rubrovolvata are small to medium-sized, and sometimes very small.

    cap

    The pileus is 20 - 65 mm wide, convex to applanate, sometimes slightly umbonate, red to orange, becoming orange to yellowish at margin, densely covered with red to orange to yellow, farinose to granular volval remnants; the margin is striate (30% to 60% of the radius) and non-appendiculate; and the context is white.

    gills

    The gills are free and white; the short gills are truncate.

    stem

    The stipe 50 - 100 × 5 - 10 mm, subcylindrical or slightly attenuate upwards, with a surface that is cream above the annulus and cream to yellowish below it. The stipe''''s basal bulb is subglobose, 10 - 20 mm wide, with its upper part covered with red, orange to yellow floccose to farinose volval remnants. The annulus is membranous, persistent, with an upper surface that is white and a lower surface having a yellowish tinge and an edge that is red to orange.

    odor/taste The odor and taste of this species have not been recorded.
    spores The spores measure (7.0-) 7.5 - 9.0 (-11.0) × (6.5-) 7.0 - 8.5 (-10.5) µm and are globose to subglobose and inamyloid.  Clamps are not found on the bases of basidia.
    discussion Originally described from Japan, this species occurs in China, northern India, Japan, Nepal, South Korea, and countries of Southeast Asia (for example, Thailand).—Zhu L. Yang
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