=Adelia=, =282=
=acuminata=, =282=, 283, 300
=Æsculaceæ=, =251=
=Æsculus=, =251=
_flava_ variety _purpurascens_, _253_
=glabra=, =251=, 252, 300
=octandra=, =253=, 254, 300
=Ailanthus altissima=, =237=, 238
_glandulosa_, _237_
Alder, 90, 300
smooth, 92, 93
speckled, 90, 91
=Alnus=, =90=, 297
=incana=, 13, =90=, 91, 297, 300
=rugosa=, 13, 90, =92=, 93, 300
=Altingiaceæ=, =166=
=Amelanchier canadensis=, =177=, 178
=lævis=, =177=, 179, 298, 299
=Amygdalaceæ=, =216=
=Anonaceæ=, =161=
Apple, American crab, 172, 173, 299
Iowa crab, 174
narrow-leaved crab, 174, 175
western crab, 174, 176
thorn, 180