Amelanchier alnifolia Amelanchier alnifolia 'Regent'
Amelanchier arborea Amelanchier canadensis
Amelanchier x grandiflora Amelanchier x grandiflora 'Autumn Brilliance'
Amelanchier x grandiflora 'Cole's Select' Amelanchier x grandiflora 'Princess Diana'
Amelanchier x grandiflora 'Robin Hill' Amelanchier laevis
Amelanchier laevis 'Lancifolia' Amelanchier lamarckii
Amelanchier ovalis 'Pumila' Ampelopsis brevipedunculata
Andropogon gerardii Angelonia angustifolia 'AngelMist™ Purple Stripe'
Anguloa clowesii Aquilegia alpina
Aquilegia caerulea Aquilegia canadensis
Aquilegia canadensis 'Corbett' Aquilegia chrysantha
Aquilegia chrysantha var. hinckleyana Aquilegia flabellata
Aquilegia flabellata 'Alba' Aquilegia flabellata 'Cameo Mix'
Aquilegia flabellata 'Nana' Aquilegia x hybrida 'Dragon Fly Mix'
Aquilegia x hybrida 'Heidi' Aquilegia x hybrida 'McKana's Giant'
Aquilegia x hybrida 'Ministar' Aquilegia x hybrida 'Musfe'
Aquilegia x hybrida 'Music' Aquilegia x hybrida 'Nora Barlow'
Aquilegia x hybrida 'Robin (Songbird Series)(n)' Aquilegia sibirica 'Biedermeier'
Aquilegia vulgaris 'Grandmother's Garden' Aralia elata
Aralia elata 'Variegata' Aralia spinosa
Arbutus andrachne Arbutus x andrachnoides
Arbutus unedo Arctostaphylos x 'Sunset'
Arctostaphylos 'Greensphere' Arctostaphylos 'John Dourley'
Arctostaphylos 'Monica' Arctostaphylos 'Pacific Mist'
Arctostaphylos densiflora Arctostaphylos densiflora 'Emerald Carpet'
Arctostaphylos densiflora 'Harmony' Arctostaphylos densiflora 'Howard McMinn'
Arctostaphylos densiflora 'Sentinel' Arctostaphylos densiflora 'White Lanterns'
Arctostaphylos diversifolia Arctostaphylos diversifolia var. planifolia
Arctostaphylos edmundsii Arctostaphylos edmundsii var. parvifolia 'Bert Johnson'
Arctostaphylos glandulosa ssp. glandulosa Arctostaphylos glauca
Arctostaphylos hookeri 'Buxifolia' Arctostaphylos hookeri 'Mills'
Arctostaphylos hookeri 'Monterey Carpet' Arctostaphylos hookeri ssp. hookeri
Arctostaphylos manzanita Arctostaphylos patula
Arctostaphylos pumila Arctostaphylos stanfordiana
Arctostaphylos stanfordiana ssp. bakeri Arctostaphylos uva-ursi
Arctostaphylos uva-ursi 'Massachusetts' Arctostaphylos uva-ursi 'Microphylla'
Arctostaphylos uva-ursi 'Point Reyes' Arctostaphylos uva-ursi 'Radiant'
Ardisia escallonioides Arisaema triphyllum
Aristolochia macrophylla Aronia arbutifolia
Aronia arbutifolia 'Brilliantissima' Aronia melanocarpa
Aronia melanocarpa 'Autumn Magic' Aronia melanocarpa 'Morton (Iroquois Beauty™)'
Aronia melanocarpa 'UCONNAM165 (Low Scape® Mound)' Aronia melanocarpa 'Viking'
Arundo donax Arundo donax 'Picta'
Arundo donax 'Variegata' Asarina scandens 'Jewels'
Asarina scandens 'Violet Glow' Asclepias incarnata
Asclepias incarnata 'Ice Ballet' Asclepias subulata
Asimina triloba Asparagus densiflorus 'Myers'
Asparagus densiflorus 'Sprengeri' Asparagus setaceus
Atriplex semibaccata Azara dentata