Species that didn't make it onto iNat:
Horsechestnut/Conkers: Aesculus hippocastaneum
Yellow Buckeye Aesculus flava
Redbud: Cercis canadensis
Silver maple: Acer saccharinum
Sugar maple : Acer saccharum
Red maple: Acer rubrum
Tulip tree: Liriodendron tulipifera
Garlic field cress: Thlaspi alliacea
Solomon's seal: Polygonatum biflorum
Lesser celandine: Ficaria verna
Sycamore: Platanus occidentalis