Amanita aestivalis

Cortinarius husseyiKey to Gilled Mushrooms     Key
This is a key to gilled mushrooms, that is, mushrooms having a definite cap with a fertile surface consisting of gills. The fruiting body usually also has a stem, although that may be lateral or absent (usually, then, the mushroom is growing from wood). You can use this key to identify mushrooms that you find.

TricholomaAgaricales     Order
Fruiting body containing fibers (usually in the stalk)

Amanita caesareaAmanita     Genus
Fruiting body having a combination of some of the following characteristics:
Stalk growing out of a cup of cottony tissue called a volva (all white-spored mushrooms with a volva go here)
Cap with scattered patches or flakes of the same sort of tissue as the volva (see second picture), easily peeled off
Annulus (skirt-like ring on stalk)

Amanita bisporigeraPhalloideae     Section
Annulus always present
Either volva present, sack-like and cap either white or olive brown, or
Stalk with a basal bulb and cap either greyish brown or yellow

Bulbous Phalloideae     SubSection
Amanita pantherina var. pantherina
No volva
Base of stalk bulbous
Cap brownish or yellowish
Links from Look-alikes
Lepidella     Section
Amanita cokeri
Annulus present
Volva absent; base of stalk swollen and rooting
Universal veil material often very powdery, or leaving very pointy remnants on the cap
Cap usually white or grey

Amanita aestivalis     

Here are the characters that distinguish this species from the others in its group. For its more general characters, see higher up on the page.
If there's just a few words or a microscopic feature here, a more thorough description can be found above.


Microscropic Characters


This mushroom was originally thought to be a variety of Amanita brunnescens, but has since been recognized as a separate species. There is, however, also a recognized A. brunnescens v. pallida (Krieger) which differs mainly in having the slightly virgate cap of Amanita brunnescens (as you can see, the spore sizes are very similar. This variety intergrades with the "original" Amanita brunnescens. These intermediate mushrooms have splotches of the brownish color on the cap, that fade out at the edges. They look a lot like what happens when you touch a drop of ink to wet paper. Whether A. brunnescens v. pallida will stay separate from Amanita aestivalis is anyone's guess. In any case, it's not a distinction that a non-professional should get real stressed about making