Abelia

Abelia × 'Edward Goucher' (Edward Goucher Abelia)
Abelia × grandiflora (Glossy Abelia)
Abelia × grandiflora 'Francis Mason' (Francis Mason Glossy Abelia)
Abelia × grandiflora 'Kaleidoscope' (Kaleidoscope Glossy Abelia)
Abelia × grandiflora 'Sunrise' (Sunrise Glossy Abelia)

Abeliophyllum

Abeliophyllum distichum (White Forsythia )

Acer

Acer buergerianum 'Miyasama yatsubusa' (Miyasama yatsubusa Trident Maple)
Acer campestre 'Carnival' (Carnival Hedge Maple)
Acer campestre 'Nanum' (Dwarf Hedge Maple)
Acer carpinifolium (Hornbeam Maple)
Acer circinatum (Vine Maple)
Acer circinatum 'Little Gem' (Little Gem Vine Maple)
Acer circinatum 'Monroe' (Monroe Vine Maple)
Acer circinatum 'Pacific Sprite' (Pacific Sprite Vine Maple)
Acer circinatum 'Sunglow' (Sunglow Vine Maple)
Acer coriaceifolium (Leatherleaf Maple)
Acer glabrum (Rocky Mountain Maple )
Acer glabrum var. douglasii (Douglas Maple )
Acer henryi (Henry's Maple)
Acer japonicum (Fullmoon Maple)
Acer japonicum 'Aconitifolium' (Fernleaf Fullmoon Maple)
Acer oblongum (Evergreen Maple )
Acer opalus subsp. obtusatum (Bosnian Maple)
Acer palmatum (Japanese Maple)
Acer palmatum 'Beni komachi' (Beni komachi Japanese Maple)
Acer palmatum 'Pixie' (Pixie Japanese Maple)
Acer palmatum 'Shaina' (Shaina Japanese Maple)
Acer palmatum 'Sharp's Pygmy' (Sharp's Pygmay Japanese Maple)
Acer palmatum 'Shindeshojo' (Shindeshojo Japanese Maple)
Acer palmatum var. dissectum (Dissected Japanese Maple)
Acer palmatum var. dissectum atropurpureum (Red Dissected Japanese Maple)
Acer palmatum var. dissectum atropurpureum 'Ever Red' (Ever Red Dissected Japanese Maple)
Acer pensylvanicum (Striped Maple )
Acer pentaphyllum (Acer pentaphyllum (no common name))
Acer pseudoplatanus 'Esk Sunset' (Eskimo Sunset Sycamore Maple)
Acer sempervirens (Cretan Maple)
Acer shirasawanum (Shirasawa Maple)
Acer shirasawanum 'Aureum' (Golden Fullmoon Maple)
Acer spicatum (Mountain Maple )
Acer tataricum (Tatarian Maple )
Acer tataricum subsp. ginnala (Amur Maple)
Acer tataricum subsp. ginnala 'Emerald Elf' (Emerald Elf Amur Maple)
Acer triflorum (Three Flowered Maple)

Adenium

Adenium obesum (Desert Rose )

Adenocarpus

Adenocarpus decorticans (Silver Broom )

Aesculus

Aesculus californica (California Buckeye )
Aesculus glabra var. arguta (Texas Buckeye )
Aesculus parviflora (Bottlebrush Buckeye)
Aesculus pavia (Red Buckeye)
Aesculus pavia 'Humilis' (Dwarf Red Buckeye)
Aesculus sylvatica (Painted Buckeye )

Agave

Agave colorata (Mescal Ceniza )
Agave macroacantha (Black-spinned Agave)
Agave ocahui (Ocahui Agave)
Agave parryi (Parry's Agave)
Agave shawii (Shaw's Agave)

Alnus

Alnus alnobetula (Circumpolar alder group )
Alnus alnobetula subsp. sinuata (Sitka Alder )
Alnus alnobetula subsp. crispa (American Green Alder)
Alnus incana subsp. rugosa (Speckled Alder )
Alnus incana subsp. tenuifolia (Thinleaf Alder )

Amelanchier

Amelanchier alnifolia (Western Serviceberry )
Amelanchier alnifolia 'Regent' (Regent Serviceberry )
Amelanchier canadensis (Shadblow )
Amelanchier × grandiflora (Apple Serviceberry)
Amelanchier × grandiflora Autumn Brilliance® (Autumn Brilliance Serviceberry)
Amelanchier × grandiflora 'Forest Prince' (Forest Prince Serviceberry)
Amelanchier laevis (Allegheny Serviceberry )

Amorpha

Amorpha nana (Dwarf Wild Indigo )

Andromeda

Andromeda polifolia (Bog Rosemary)

Aralia

Aralia elata (Angelica Tree )
Aralia elata 'Variegata' (Variegated Angelica Tree)

Arbutus

Arbutus unedo (Strawberry Tree )

Arctostaphylos

Arctostaphylos × 'Austin Griffiths' (Austin Griffiths Manzanita)
Arctostaphylos 'White Lanterns' (White Lanterns Manzanita)
Arctostaphylos andersonii (Santa Cruz Manzanita )
Arctostaphylos bakeri subsp. bakeri (Baker Manzanita)
Arctostaphylos bakeri subsp. bakeri 'Louis Edmunds' (Louis Edmunds Manzanita)
Arctostaphylos canescens (Hoary Manzanita )
Arctostaphylos columbiana (Hairy Manzanita)
Arctostaphylos confertiflora (Santa Rosa Island Manzanita)
Arctostaphylos densiflora (Sonoma Manzanita )
Arctostaphylos densiflora 'Howard McMinn' (Howard McMinn Manzanita)
Arctostaphylos edmundsii (Little Sur Manzanita)
Arctostaphylos hookeri (Hooker's Manzanita )
Arctostaphylos hookeri subsp. franciscana (Franciscan Manzanita)
Arctostaphylos insularis (Island Manzanita)
Arctostaphylos manzanita (Parry Manzanita )
Arctostaphylos manzanita 'St. Helena' (St. Helena Manzanita)
Arctostaphylos montaraensis (Montara Manzanita)
Arctostaphylos nevadensis (Pinemat Manzanita)
Arctostaphylos pajaroensis (Pajaro Manzanita)
Arctostaphylos pajaroensis 'Bretts Beauty' (Brett's Beauty Manzanita)
Arctostaphylos patula (Green Manzanita )
Arctostaphylos pumila (Sandmat Manzanita )
Arctostaphylos pungens (Ponitleaf Manzanita )
Arctostaphylos refugioensis (Refugio Manzanita)
Arctostaphylos rudis (Shag Bark Manzanita )
Arctostaphylos tomentosa (Wolly Manzanita )
Arctostaphylos uva-ursi (Kinnikinnik )