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