List of Armillaria species

First treated by Elias Magnus Fries in 1821, and later assigned generic rank by Friedrich Staude in 1857,[1] Armillaria is classified in the family Physalacriaceae of the Agaricales, the gilled mushrooms.

The growth of the rhizomorph networks allows for tree-to-tree spread of the fungus even when direct contact between diseased and healthy plants is not possible.

[6] The genus once served as a wastebasket taxon for many agaric mushrooms with a white spore print, gills attached to the stem, and an annulus.

Due largely to differing interpretations on the limits of the genus, over 270 species and varieties have been placed in Armillaria or its synonym Armillariella.

A comprehensive 1995 study by Tom Volk and Harold Burdsall evaluated all of the epithets that have been used in Armillaria or Armillariella.

Several groups of shaggy yellowish mushrooms growing on the ground in a forest. Some mushrooms have small convex caps, others with larger expanded caps and a skirt-like ring on the stem.
A. mellea is the type species of the genus Armillaria .
A chestnut colored mushroom with a floppy-looking margin and a shaggy stem grows among grass and young shoots.
A. borealis
A group of brown mushrooms, their ring-marked caps overlapping, grows in tall grass.
A. cepistipes
Young orangeish bulbous mushrooms are covered in shaggy, scale-like hairs.
A. gallica
A pair of mushrooms jut from the side of a mossy tree trunk; their cap is grey and warty, and their gills are still hiden by the universal veil.
A. hinnulea
A young mushroom grows out of clubmoss, its yellow stem and orange cap both textured.
A. luteobubalina
Two clusters of brownish mushrooms growing from wood. One of the clusters has been pulled from the tree to expose the bases of their stems.
A. puiggarii
A tight clump of dry-looking, brown mushrooms with the margins higher than the center of the cap; they grown out of what appear to be the root of a tree.
A. tabescens