with …

twigs=■ square w/corky wings;  bark=breaks into plates;  seed is ½ length of helicopter wide wing
blue ash  Fraxinus quadrangulata

OR they are NOT, but with …
leaf scar shape= horseshoe;  bark=ridged with narrow--diamond-shapes
white ash  Fraxinus americana

OR they are NOT ( leaf scar shape= semicircle or oval), but with …
twigs=rusty hairy;  buds=rusty hairy;  outer-bark inner-face=​reddish
red ash  Fraxinus pennsylvanica

OR they are NOT, but with …
buds=near-black;  bark=smooth can-be-rubbed-off
black ash  Fraxinus nigra

OR they are NOT, but with …
buds=red-brown;  bark=ridged firm;  leaf scar shape=D◗
red ash variant green ash  Fraxinus pennsylvanica

Learn more about ash genus Fraxinus (Fraxinus spp.)

Part of olive / lilac  family Oleaceae.

Uses by native peoples
(Ethnobotany database)
  Fraxinus hosts caterpillars of 150 species
of butterflies and moths, in some areas.

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