| armillaria | (n) genus of edible mushrooms having white spores an annulus and blue juice; some are edible; some cause root rot, Syn. genus Armillaria |
| armillaria caligata | (n) fungus with a brown cap and white gills and a membranous ring halfway up the stalk, Syn. booted armillaria |
| armillaria ponderosa | (n) a large white mushroom that develops brown stains as it ages; gills are white; odor is spicy and aromatic; collected commercially for oriental cooking the Pacific Northwest, Syn. white matsutake |
| armillaria zelleri | (n) a large fungus with viscid cap that dries and turns brown with age; gills are off-white |