austriaca
Southern
austrinus
From the south
Austroboletus
Southern Bolete
autochthona
Sprung from the soil, native
autoturbinatus
With built-in spinning top
autumnalis
Autumn
avellanea, avellaneus
Avellaneous colored (pale gray tinged with pink)
avellaneialba
Pale gray tinged with pink & white
avellanocoeruleus
Hazel and sky-blue
avenacea
Oat-colored
axantha
Without yellow (pigment)
azaleae
Grows on azaleas
azonites
Not zoned
azurea, azureus
Blue
azureovelatus
Possessing a blue veil
babingtonii
Charles Cardale Babington (1808-1895) British botanist