Amanita shennongjiana - Amanitaceae.org - Taxonomy and Morphology of Amanita and Limacella
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name Amanita shennongjiana
name status nomen acceptum
author Yang-Yang Cui, Qing Cai & Zhu L. Yang
english name "Shennongji Ringless Amanita"
intro This text is derived from the original description of Amanita shennongjiana.  The fruiting bodies of Amanita shennongjiana are small to medium-sized.
cap The cap is 40 – 90 mm wide, plano-convex to planar, raised over the stem (umbonate), grayish brown to brownish.  Volva is mostly absent, but occasionally present as white patches.  The cap’s margin is radially grooved covering 40% - 50% of the cap's radius.  There is no material hanging from the edge.  The flesh is white.
gills The gills are free, crowded, and white.  The short gills are truncate and plentiful.
stem The stem is 100 – 160 × 5 – 12 mm, nearly cylindrical or narrowing upwards, white to dirty white,and covered with minute, concolorous fibrils.  The stem lacks a basal bulb.  At the stem's base, the volva is saccate, 15 – 30 × 10 – 15 mm, membranous, and is easily broken into large patches during development of fruiting bodies; both the inner and outer surfaces are white.
odor/taste The odor and taste were not recorded for the present species.
spores The spores measure 10.0 – 12.0 × 9.0 – 11.0 µm and are globose to subglobose and inamyloid.  There are no clamps at the bases of basidia.
discussion Amanita shennongjiana is described from central China (Hubei Province).  It has associations with broad-leaved trees.

The European A. vaginata can be confused to A. shennongjiana in appearance, but A. vaginata has a robust fruiting body, a non-umbonate cap with relatively shorter striations on the margin and a relatively thicker volva on the stem’s base.&mdas;Yang-Yang Cui and Rachel Warner
brief editors RET

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