Amanita sinicoflava - Amanitaceae.org - Taxonomy and Morphology of Amanita and Limacella
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name Amanita sinicoflava
name status nomen acceptum
author Tulloss
english name "Mandarin Yellow Ringless Amanita"
images
  • Amanita sinicoflava, New York (state), U.S.A.Amanita sinicoflava, New York (state), U.S.A.

    1. Amanita sinicoflava, New York (state), U.S.A.

  • Amanita sinicoflava, Sussex Co., New Jersey, U.S.A.Amanita sinicoflava, Sussex Co., New Jersey, U.S.A.

    2. Amanita sinicoflava, Sussex Co., New Jersey, U.S.A.

    • cap

    Amanita sinicoflava has a Chinese yellow or "curry powder colored" or yellow-olivaceous or olive-tan cap that is 25 - 70 mm wide. Striations run inward from the cap edge for about 40% of the radius. Warts or patches of pallid to grayish volva are often left on the cap, but can be washed off easily by rain.

    gills The gills of this species turn grayer as the mushroom ages. The very plentiful short gills are truncate.
    stem This mushroom has a whitish, exannulate stem (60 - 135 × 4 - 12 mm) decorated with somewhat darker fibrils. The volval remnants are saccate and submembranous and becoming progressively grayer with age beginning from the top of the sac and working downward.
    spores The spores measure (8.0-) 9.1 - 12.1 (-15.4) × (7.0-) 8.4 - 11.5 (-15.4) µm and are globose to subglobose (very rarely broadly ellipsoid) and inamyloid. Clamps are absent from bases of basidia.
    discussion The species occurs with oak, beech, and diverse conifers.  It is distributed widely in the northeastern and north central United States and, probably, in southeastern Canada—fruiting from late June to October.  Prior to its description, this species was often determined as "Amanita fulva" and might be found in herbaria under that name.  Among taxa that are most similar macroscopically are A. mortenii Knudsen & Borgen, A. olivaceogrisea Kalaméés, and A. submembranacea (Bon) Gröger.—R. E. Tulloss.
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