Olive text indicates a specimen that has not been thoroughly examined (for example, for microscopic details) and marks other places in the text where data is missing or uncertain.
The following material is based on the collector's notes and photographs and original research of RET.
??, pale gray to silvery gray, becoming broadly convex; context white to off-white dark gray below pileipellis, proportionately thick over stipe; margin striate (0.2 - 0.25R), becoming rimose in only known specimen; universal veil as irregular common submembranous patches, stretched by pileus expansion, becoming ochraceous.
??, striate at the apex in region of pale gray to gray surface pulverulence; context ??; exannulate; universal veil submembranous, saccate, constricted, flaring above, gray on inner surface.
On pileus, interior: filamentous undifferentiated hyphae ?? μm wide, with somewhat thickened walls, irregularly disposed, sometimes abruptly curving up to 180°; inflated cells dominating, terminal singly, with walls somewhat thickened
This collection was originally determined to be A. protecta and was detected as distinct by comparison of sequences of the nrITS locus.
We provide comparison of the sporographs of the two species below. One should be cautious about this comparison because the number of spores found on the single specimen of the present species represent a very small sampling. Moreover, the specimen is immature; most of the hymenium was not yet bearing spores when the basidiome was dried.
—R. E. Tulloss & D. Viess
Information to support the viewer in reading the content of "technical" tabs
can be found here.
1. Amanita sp-C18, Huckleberry Preserve, Contra Costa Co., California, USA. (RET 583-2).
2. Amanita sp-C18, Huckleberry Preserve, Contra Costa Co., California, USA. (RET 583-2).
3. Amanita sp-C18, Huckleberry Preserve, Contra Costa Co., California, USA. (RET 583-2).
4. Amanita sp-C18, Huckleberry Preserve, Contra Costa Co., California, USA. (RET 583-2).
5. Amanita sp-C18, Huckleberry Preserve, Contra Costa Co., California, USA. (RET 583-2).
Debbie Viess - (1-5) Huckleberry Preserve, Contra Costa County, California, USA. [Original images available on mushroomobserver.org (here).]
Spore data for collections provisionally identified as: Amanita sp-C18 Tulloss
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.