Physiognomic categories
Category
Example
Class . . . . . . . . . . Woodlands
Subclass . . . . . . .Mainly Evergreen Woodlands
Group
. . . . . . . . .Evergreen Needle‑leaved Woodlands
Subgroup
. . . . . Natural/Seminatural
Formation
. . . . Evergreen Coniferous Woodland with Rounded Crowns
Floristic categories
Alliance
. . . . . . Juniperus occidentalis
Association
. . . . Juniperus
occidentalis /
Artemesia
tridentata