1. Amanita sinensis var. sinensis, Yunnan Prov., China.
The fruiting bodies of A. sinensis are
medium-sized to large.
The cap is 70-120 mm wide, convex to planate, whitish to
grayish; its center is grayish to dark gray, and its margin is short-striate.
It is covered with gray, dark gray to gray-brown, subconic warts which are 2-4 mm
wide and up to 3 mm high. Its flesh is white.
The gills of this species are free to subfree, crowded, white to cream-colored; and the short gills are
truncate and of diverse lengths.
The stem is 100 - 150 × 10 - 25 mm, subcylindric to attenuate upwards; its surface is dirty white to
grayish, and covered with grayish, gray to dark gray farinose squamules;
the stem's basal bulb is 20 - 35 mm wide, ventricose to nearly
clavate. The stem's ring is nearly apical, its upper surface is white and
lower surface grayish, and often torn from the stem during the expanding of the cap.
Spores of A. sinensis measure (8.0-)9.5-12.5(-13.5) × 7.0-8.5(-9.5) µm and are broadly ellipsoid to ellipsoid, and inamyloid. Clamps are present at the bases of basidia.
Amanita sinensis was originally described from China. It occurs in mixed forests with
broad-leaved trees and conifers. Its range extends from Nepal to China to Japan.
Amanita sinensis is characterized by its dirty white to grayish pileus with gray to dark
grey verrucouse volval warts, subapical and fugacious ring on the stem,
ventricose to clavate bulb, inamyloid, broadly ellipsoid to ellipsoid
spores, and the presence of clamps.—Zhu L. Yang
Amanita sinensis var. sinensis
Zhu L. Yang. 1997. Biblioth. Mycol. 170: 23, figs. 10-14.
Each spore data set is intended to comprise a set of measurements from a single specimen made by a single observer;
and explanations prepared for this site talk about specimen-observer pairs associated with each data set.
Combining more data into a single data set is non-optimal because it obscures observer differences
(which may be valuable for instructional purposes, for example) and may obscure instances in which
a single collection inadvertently contains a mixture of taxa.