Amanita brunneofuliginea - Amanitaceae.org - Taxonomy and Morphology of Amanita and Limacella
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name Amanita brunneofuliginea
name status nomen acceptum
author Zhu L. Yang
english name "Brown-Black Ringless Amanita"
intro The following is based in part on the original description of this species by Yang (1997).
cap The fruiting bodies of A. brunneofuliginea are medium-size to large.  Its cap is 50 - 140 mm wide, convex to plano-convex; its center is often slightly umbonate.  It is blackish brown to brown-black, becoming paler towards the margin.  Its margin is tuberculate-striate (extending 10% to 30% of the cap radius), and non-appendiculate.  The volval remnants on the cap are white to dirty white and patch-like.  The flesh is white.
gills The gills of this species are free, crowded, and white.  The short gills are squarely cut-off or nearly so.
stem The ringless stem is 80 - 220 mm long, nearly cylindric, slightly tapering upward, with the stem's very top slightly expanded.  The stem is 5 mm wide at the very top and 30 mm wide near base; the upper half is white to whitish with grayish fibrils; and the lower half is grayish.  The flesh of the stem is white and hollow.  The stem lacks a basal bulb entirely.  The volva is saccate, membranous, and rather firm.  It has a free limb 25 - 70 mm high, with an outer surface that is white to dirty white and covered with leather-colored, cracked squamules.  The inner surface of the volva is white.. 
odor/taste The odor is indistinct.
spores The spores of this species measure (10.0-) 10.5 - 13.0 (-14.0) × (9.0-) 9.5 - 12.0 (-12.5) µm and are subglobose to broadly ellipsoid and inamyloid.  Clamps are not present at the bases of basidia.
discussion Amanita brunneofuliginea was originally described from Yunnan Province, China.  It seems common in the subalpine to alpine regions of southwestern China and in northeastern parts of China.—Z.-L. Yang
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