Classification, identification, nomenclature and phylogeny or evolution of useful plants (including

forest trees and aquatic plants);

Natural distribution of plants; flora; plant checklists;

For: plant collection and introduction, see F30

plant ecology: aquatic, see M40

terrestrial, see F40

plant genetics, see F30

plant variation, see F30

soil flora, see P34

taxonomy of organisms used in pest and disease control, see H10, H20, L72, L73

weed taxonomy, see H60