- American plum
- American robin
- American shad
- American toad
- American witchhazel
- Amorpha canescens
- Amorpha ouachitensis
- Ampelopsis aconitifolia
- Ampelopsis brevipedunculata
- Ampelopsis brevipedunculata 'Elegans'
- Amsonia 'Blue Ice'
- Amsonia 'Seaford Skies'
- Amsonia ciliata
- Amsonia ciliata var. tenuifolia 'Georgia Pancake'
- Amsonia hubrichtii
- Amsonia illustris
- Amsonia tabernaemontana
- Amsonia tabernaemontana 'Montana'
- Amsonia tabernaemontana 'Short Stack'
- Amsonia tabernaemontana var. salicifolia
- Anagallis monelli
- Ananas comosus
- Ananas comosus
- Anaphalis margaritacea
- Anaphalis triplinervis
- Anchusa azurea 'Dropmore'
- Anchusa azurea 'Loddon Royalist'
- Andropogon capillipes 'Valdosta Blue'
- Andropogon gerardii
- Andropogon glomeratus
- Anemone blanda
- Anemone blanda 'Blue Shades'
- Anemone blanda 'Blue Star'
- Anemone blanda 'White Splendour'
- Anemone canadensis
- Anemone coronaria
- Anemone hupehensis
- Anemone hupehensis 'Pamina'
- Anemone hupehensis var. japonica 'Bodnant Burgundy'
- Anemone hupehensis var. japonica 'Prinz Heinrich'
- Anemone hybrida 'Honorine Jobert'
- Anemone hybrida 'Kˆnigin Charlotte'
- Anemone hybrida 'Lady Gilmour'
- Anemone hybrida 'September Charm'
- Anemone lesseri
- Anemone narcissiflora
- Anemone sylvestris
- Anemone virginiana




































