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Abelia chinensis  - Chinese abelia
Abelia 'Edward Goucher'  - abelia   ( T&T-2 )
Abelia × grandiflora  - glossy abelia   ( T&T-2 )
Abelia × grandiflora 'Sherwoodii'  - glossy abelia   ( T&T-1 )
Abelia mosanensis  - fragrant abelia
Abeliophyllum distichum  - white forsythia   ( T&T-1 )
Abelmoschus moschatus  - musk mallow   ( T&T-2 )
Abies balsamea  - balsam fir
Abies balsamea 'Jamy'  - balsam fir
Abies balsamea 'Nana'  - balsam fir
Abies concolor  - white fir   ( T&T-4 )
Abies firma  - momi fir
Abies fraseri  - Fraser fir   ( T&T-1 )
Abies grandis  - grand fir
Abies homolepis  - Nikko fir
Abies koreana  - Korean fir
Abies nordmanniana  - Caucasian fir
Abies nordmanniana 'Brandt'  - Caucasian fir
Abies pinsapo  - Spanish fir
Abutilon × hybridum  - flowering-maple   ( T&T-4 )
Abutilon × hybridum 'Bella Red'  - flowering-maple
Abutilon 'Moonchimes'  - flowering-maple
Abutilon pictum 'Gold Dust'  - flowering-maple
Acacia koa  - koa   ( T&T-0 )
Acalypha hispida  - red hot cat's tail   ( T&T-2 )
Acalypha wilkesiana  - Jacob's coat   ( T&T-3 )
Acantholimon ulicinum  - acantholimon
Acanthus hungaricus  - bear's breeches   ( T&T-1 )
Acanthus mollis  - bear's breeches
Acanthus mollis 'Oak Leaf'  - bear's breeches
Acanthus montanus  - mountain thistle
Acanthus spinosus  - bear's breeches   ( T&T-5 )
Acanthus 'Summer Beauty'  - bear's breeches
Acca sellowiana  - pineapple guava
Acer buergerianum  - trident maple   ( T&T-5 )
Acer campestre  - hedge maple   ( POM ,   T&T-8 )
Acer campestre 'Postelense'  - hedge maple   ( T&T-1 )
Acer capillipes  - snakebark maple
Acer cappadocicum  - cappadocian maple
Acer carpinifolium  - hornbeam maple
Acer cissifolium  - ivy-leaved maple
Acer davidii  - snakebark maple
Acer × freemanii 'Armstrong'  - Freeman maple   ( T&T-2 )
Acer × freemanii 'Marmo'  - Freeman maple
Acer griseum  - paperbark maple   ( POM ,   T&T-11 )
Acer japonicum  - full moon maple   ( T&T-2 )
Acer japonicum 'Aconitifolium'  - full moon maple   ( T&T-4 )
Acer japonicum 'Green Cascade'  - full moon maple   ( T&T-1 )
Acer japonicum 'O-isami'  - full moon maple
Acer japonicum 'Vitifolium'  - full moon maple
Acer macrophyllum  - bigleaf maple
Acer maximowiczianum  - Nikko maple
Acer miyabei  - maple
Acer miyabei 'Morton' STATE STREET  - miyabe maple   ( POM ,   T&T-1 )
Acer monspessulanum  - Montpellier maple
Acer negundo  - boxelder   ( T&T-1 )
Acer oliverianum  - Chinese maple
Acer palmatum  - Japanese maple   ( T&T-6 )
Acer palmatum 'Arakawa'  - Japanese maple
Acer palmatum 'Beni-kawa'  - Japanese maple
Acer palmatum 'Beni-tsukasa'  - Japanese maple
Acer palmatum 'Bloodgood'  - Japanese maple   ( T&T-11 )
Acer palmatum 'Burgundy Lace'  - Japanese maple
Acer palmatum 'Butterfly'  - Japanese maple   ( T&T-1 )
Acer palmatum 'Fall's Fire'  - Japanese maple
Acer palmatum 'Higasayama'  - Japanese maple   ( T&T-1 )
Acer palmatum 'Hogyoku'  - Japanese maple
Acer palmatum 'Katsura'  - Japanese maple   ( T&T-2 )
Acer palmatum 'Murasaki-hime'  - Japanese maple
Acer palmatum 'Nuresagi'  - Japanese maple
Acer palmatum 'Omurayama'  - Japanese maple
Acer palmatum 'Osakazuki'  - Japanese maple
Acer palmatum 'Oshio-beni'  - Japanese maple   ( T&T-4 )
Acer palmatum 'Red Select'  - Japanese maple   ( T&T-3 )
Acer palmatum 'Sango-kaku'  - Japanese maple   ( T&T-4 )
Acer palmatum 'Satsuki-beni'  - Japanese maple
Acer palmatum 'Shaina'  - Japanese maple   ( T&T-5 )
Acer palmatum 'Sharp's Pygmy'  - Japanese maple
Acer palmatum 'Sherwood Flame'  - Japanese maple
Acer palmatum 'Shindeshojo'  - Japanese maple   ( T&T-1 )
Acer palmatum 'Shishigashira'  - Japanese maple   ( T&T-3 )
Acer palmatum 'Suminagashi'  - Japanese maple   ( T&T-3 )
Acer palmatum 'Trompenburg'  - Japanese maple
Acer palmatum 'Tsuma-gaki'  - Japanese maple
Acer palmatum 'Utsu-semi'  - Japanese maple   ( T&T-1 )
Acer palmatum var. dissectum  - Japanese maple   ( T&T-7 )
Acer palmatum var. dissectum 'Seiryu'  - Japanese maple   ( T&T-5 )
Acer palmatum 'Villa Taranto'  - Japanese maple   ( T&T-1 )
Acer pensylvanicum  - snakebark maple
Acer pentaphyllum  - maple
Acer pictum  - painted maple
Acer pictum subsp. mono  - painted maple
Acer platanoides  - Norway maple   ( T&T-3 )
Acer platanoides 'Crimson King'  - Norway maple   ( T&T-7 )
Acer platanoides 'Deborah'  - Norway maple
Acer platanoides 'Emerald Queen'  - Norway maple   ( T&T-3 )
Acer pseudoplatanus  - sycamore maple   ( T&T-2 )
Acer pseudosieboldianum  - Korean maple   ( T&T-1 )
Acer rubrum  - red maple   ( T&T-5 )
Acer rubrum 'Autumn Flame'  - red maple   ( T&T-6 )
Acer rubrum 'Columnare'  - red maple   ( T&T-1 )
Acer rubrum 'Karpick'  - red maple   ( T&T-1 )
Acer rubrum 'Northwood'  - red maple
Acer rubrum 'October Glory'  - red maple   ( T&T-10 )
Acer rubrum 'Sun Valley'  - red maple   ( T&T-3 )
Acer saccharinum  - silver maple   ( T&T-2 )
Acer saccharinum 'Silver Queen'  - silver maple   ( T&T-2 )
Acer saccharum  - sugar maple   ( T&T-4 )
Acer saccharum 'Bailsta' FALL FIESTA  - sugar maple   ( POM ,   T&T-6 )
Acer saccharum 'Goldspire'  - sugar maple   ( T&T-1 )
Acer saccharum 'Green Mountain'  - sugar maple   ( T&T-5 )
Acer saccharum subsp. nigrum  - black maple   ( T&T-1 )
Acer shirasawanum 'Aureum'  - full moon maple
Acer tataricum  - tatarian maple   ( T&T-1 )
Acer triflorum  - three-flowered maple   ( POM ,   T&T-2 )
Acer truncatum  - shantung maple   ( POM ,   T&T-2 )
Achillea ageratifolia  - Greek yarrow   ( T&T-1 )
Achillea 'Anblo' ANTHEA  - yarrow   ( T&T-2 )
Achillea 'Coronation Gold'  - yarrow   ( T&T-5 )
Achillea filipendulina  - fern-leaf yarrow
Achillea filipendulina 'Altgold'  - fern-leaf yarrow
Achillea filipendulina 'Cloth of Gold'  - fern-leaf yarrow   ( T&T-2 )
Achillea filipendulina 'Gold Plate'  - fern-leaf yarrow   ( T&T-1 )
Achillea 'Martina'  - yarrow
Achillea millefolium  - yarrow   ( T&T-1 )
Achillea 'Moonshine'  - yarrow   ( T&T-12 )
Achillea sibirica  - Siberian yarrow
Achillea 'Snow Sport'  - yarrow   ( T&T-1 )
Achillea 'Terracotta'  - yarrow   ( T&T-6 )
Achillea tomentosa 'Aurea'  - woolly yarrow   ( T&T-2 )
Achillea 'Walther Funcke'  - yarrow   ( T&T-1 )
Achimenes (group)  - hot water plant   ( T&T-1 )
Aconitum carmichaelii  - azure monkshood
Aconitum carmichaelii 'Arendsii'  - azure monkshood
Aconitum 'Eleonara'  - monkshood
Aconitum napellus  - monkshood   ( T&T-1 )
Aconitum 'Spark's Variety'  - monkshood   ( T&T-2 )
Acorus calamus  - sweet flag
Acorus calamus 'Variegatus'  - sweet flag   ( T&T-1 )
Acorus gramineus  - grassy-leaved sweet flag   ( T&T-2 )
Acorus gramineus 'Minimus Aureus'  - grassy-leaved sweet flag   ( T&T-4 )
Acorus gramineus 'Oborozuki'  - grassy-leaved sweet flag   ( T&T-1 )
Acorus gramineus 'Ogon'  - grassy-leaved sweet flag   ( T&T-3 )
Acorus gramineus 'Pusillus Minimus Aureus'  - grassy-leaved sweet flag
Acorus gramineus 'Variegatus'  - grassy-leaved sweet flag   ( T&T-5 )
Actaea 'Chocoholic'  - bugbane
Actaea dahurica  - bugbane
Actaea matsumurae 'White Pearl'  - bugbane   ( POM ,   T&T-6 )
Actaea pachypoda  - white baneberry   ( T&T-2 )
Actaea 'Pink Spire'  - bugbane   ( T&T-1 )
Actaea podocarpa  - bugbane
Actaea racemosa  - black cohosh   ( T&T-3 )
Actaea simplex  - bugbane   ( T&T-3 )
Actinidia arguta  - hardy kiwi
Actinidia arguta 'Issai'  - hardy kiwi vine
Actinidia deliciosa  - kiwifruit
Actinidia kolomikta  - variegated kiwi vine   ( T&T-1 )
Adenium obesum  - desert rose
Adenophora 'Amethyst'  - ladybells   ( T&T-3 )
Adenophora liliifolia  - ladybells   ( T&T-3 )
Adiantum capillus-veneris  - maidenhair fern   ( T&T-1 )
Adiantum hispidulum  - rough maidenhair fern
Adiantum pedatum  - Northern maidenhair fern   ( T&T-7 )
Adiantum raddianum  - delta maidenhair fern
Adina rubella  - Chinese buttonbush
Aechmea fasciata  - urn plant
Aegopodium podagraria 'Variegatum'  - bishop's weed   ( T&T-8 )
Aeonium undulatum  - saucer plant
Aeschynanthus radicans  - lipstick plant
Aesculus californica  - California buckeye
Aesculus × carnea  - red horse chestnut
Aesculus × carnea 'Briotii'  - red horse chestnut   ( T&T-5 )
Aesculus × carnea 'Marginata'  - red horse chestnut
Aesculus chinensis  - Chinese horse chestnut
Aesculus flava  - yellow buckeye   ( T&T-3 )
Aesculus glabra  - Ohio buckeye   ( T&T-3 )
Aesculus glabra 'Nana'  - Ohio buckeye
Aesculus hippocastanum  - horse chestnut
Aesculus hippocastanum 'Baumannii'  - horse chestnut   ( T&T-2 )
Aesculus indica 'Sydney Pearce'  - Indian horse chustnut
Aesculus parviflora  - bottlebrush buckeye   ( POM ,   T&T-8 )
Aesculus parviflora var. serotina  - bottlebrush buckeye
Aesculus pavia  - red buckeye   ( POM ,   T&T-7 )
Aesculus sylvatica  - painted buckeye
Agalinis tenuifolia  - slenderleaf false foxglove   ( T&T-1 )
Agapanthus africanus  - African lily
Agapanthus (group)  - lily of the Nile   ( T&T-2 )
Agastache 'Apricot Sunrise'  - giant hyssop   ( T&T-4 )
Agastache 'Ava'  - giant hyssop   ( T&T-1 )
Agastache 'Black Adder'  - giant hyssop   ( T&T-1 )
Agastache 'Blue Boa'  - giant hyssop
Agastache 'Blue Fortune'  - giant hyssop   ( T&T-11 )
Agastache cana  - hummingbird's mint
Agastache 'Firebird'  - giant hyssop
Agastache foeniculum  - anise hyssop   ( T&T-2 )
Agastache nepetoides  - yellow giant hyssop   ( T&T-2 )
Agastache 'Pink Pop'  - giant hyssop
Agastache 'Purple Haze'  - giant hyssop   ( T&T-2 )
Agastache 'Raspberry Summer'  - giant hyssop   ( T&T-1 )
Agastache rugosa 'Golden Jubilee'  - purple giant hyssop
Agastache rupestris  - threadleaf giant hyssop   ( T&T-3 )
Agastache rupestris 'Apache Sunset'  - threadleaf giant hyssop
Agastache 'Summer Breeze'  - giant hyssop
Agastache SUMMER GLOW  - giant hyssop
Agastache 'Summer Love'  - giant hyssop
Agastache 'Tutti-frutti'  - giant hyssop   ( T&T-3 )
Agastache 'Violet Vision'  - hummingbird's mint
Agave americana  - American century plant
Agave attenuata  - century plant
Agave 'Blue Glow'  - century plant
Agave desmetiana  - spineless jade agave
Agave parryi  - Parry's agave
Agave schidigera  - century plant
Ageratina altissima  - white snakeroot
Ageratum houstonianum  - floss flower   ( T&T-1 )
Ageratum houstonianum 'Blue Horizon'  - floss flower   ( POM ,   T&T-5 )
Aglaia edulis  - chu-lan tree
Aglaia odorata  - chu-lan tree
Aglaonema commutatum  - Philippine evergreen
Aglaonema 'Silver Queen'  - Chinese evergreen
Agrostis palustris NO MOW  - creeping bent grass
Ailanthus altissima  - tree of Heaven
Ajania pacifica  - ajania   ( T&T-2 )
Ajuga reptans  - common bugle   ( T&T-7 )
Ajuga reptans 'Arctic Fox'  - bugleweed   ( T&T-1 )
Ajuga reptans 'Atropurpurea'  - bugleweed   ( T&T-2 )
Ajuga reptans 'Burgundy Glow'  - bugleweed   ( T&T-9 )
Ajuga reptans 'Catlin's Giant'  - bugleweed   ( T&T-7 )
Ajuga reptans 'Dixie Chip'  - bugleweed   ( T&T-1 )
Ajuga reptans 'Purple Brocade'  - bugleweed   ( T&T-1 )
Ajuga reptans 'Purple Torch'  - bugleweed   ( T&T-1 )
Ajuga reptans 'Silver Beauty'  - bugleweed   ( T&T-1 )
Ajuga reptans 'Toffee Chip'  - bugleweed   ( T&T-1 )
Ajuga 'Sparkler'  - bugleweed
Akebia quinata  - chocolate vine   ( T&T-3 )
Albizia julibrissin  - silk tree
Albizia saman  - rain tree
Alcea rosea  - hollyhock
Alcea rosea 'Nigra'  - hollyhock   ( T&T-4 )
Alcea rosea (single)  - hollyhock   ( T&T-10 )
Alcea rugosa  - hollyhock   ( T&T-1 )
Alchemilla mollis  - lady's mantle   ( T&T-9 )
Alchemilla mollis 'Thriller'  - lady's mantle
Aleurites fordii  - tung-oil tree
Aleurites moluccanus  - candlenut tree
Alisma triviale  - northern water plantain   ( T&T-1 )
Allamanda cathartica  - golden trumpet   ( T&T-3 )
Allamanda schottii  - bush allamanda   ( T&T-1 )
Allium altaicum  - onion
Allium 'Ambassador'  - ornamental onion
Allium babingtonii  - wild leek
Allium caeruleum  - ornamental onion
Allium cepa  - onion   ( T&T-3 )
Allium cernuum  - nodding onion   ( T&T-1 )
Allium 'Chivette'  - chives
Allium cristophii  - star of Persia   ( T&T-1 )
Allium fistulosum  - scallion   ( T&T-1 )
Allium 'Forelock'  - ornamental onion   ( T&T-1 )
Allium giganteum  - ornamental onion   ( T&T-3 )
Allium 'Globemaster'  - ornamental onion   ( T&T-5 )
Allium karataviense  - ornamental onion   ( T&T-1 )
Allium kunthianum  - allium
Allium lusitanicum  - German garlic
Allium 'Millenium'  - ornamental onion
Allium moly  - golden garlic   ( T&T-4 )
Allium 'Purple Sensation'  - ornamental onion
Allium sativum  - cultivated garlic   ( T&T-2 )
Allium schoenoprasum  - chives   ( T&T-5 )
Allium schubertii  - ornamental onion   ( T&T-1 )
Allium senescens  - German garlic
Allium senescens 'Blue Eddy'  - German garlic
Allium senescens subsp. glaucum  - German garlic   ( T&T-1 )
Allium sphaerocephalon  - round-headed leek
Allium stellatum  - prairie onion   ( T&T-1 )
Allium 'Sugar Melt'  - ornamental onion
Allium thunbergii 'Ozawa'  - ornamental onion   ( T&T-2 )
Allium tuberosum  - garlic chives   ( T&T-2 )
Allium ursinum  - wild garlic
Alnus cordata  - Italian alder
Alnus glutinosa  - European alder   ( T&T-2 )
Alnus incana  - grey alder
Alnus incana subsp. rugosa  - hazel alder
Alnus japonica  - Japanese alder
Alnus maritima  - seaside alder
Alnus × mayrii  - alder
Alnus serrulata  - hazel alder
Alocasia × amazonica  - elephant's ear
Alocasia × amazonica 'Polly'  - Amazonian elephant's ear
Alocasia (group)  - elephant's ear   ( T&T-9 )
Alocasia macrorrhizos  - giant elephant's ear
Aloe vera  - aloe
Aloysia citriodora  - lemon verbena   ( T&T-2 )
Alpinia galanga  - siamese ginger
Alpinia japonica  - ginger lily
Alpinia zerumbet  - shellplant
Alpinia zerumbet 'Variegata'  - shell ginger   ( T&T-2 )
Alstroemeria aurea  - lily of the Incas
Alstroemeria 'Sweet Laura'  - lily of the Incas
Alstroemeria 'The Third Harmonic'  - lily of the Incas
Alternanthera dentata  - Joseph's coat   ( T&T-4 )
Alternanthera ficoidea  - Joseph's coat   ( T&T-1 )
Alyssum murale  - yellowtuft   ( T&T-1 )
Alyssum propinquum  - alyssum
Amaranthus caudatus  - love-lies-bleeding
Amaranthus tricolor  - Joseph's coat   ( T&T-1 )
Amelanchier alnifolia 'Regent'  - alder-leaved serviceberry   ( T&T-3 )
Amelanchier alnifolia var. pumila  - dwarf serviceberry
Amelanchier arborea  - serviceberry   ( POM ,   T&T-5 )
Amelanchier canadensis  - serviceberry   ( T&T-9 )
Amelanchier × grandiflora 'Autumn Brilliance'  - apple serviceberry   ( POM ,   T&T-11 )
Amelanchier laevis  - Allegheny serviceberry   ( T&T-3 )
Amelanchier lamarckii  - juneberry
Amelanchier nantucketensis  - Nantucket serviceberry
Amelanchier obovalis  - coastal serviceberry
Amelanchier stolonifera  - running serviceberry   ( T&T-1 )
Amorpha canescens  - lead plant   ( T&T-1 )
Amorpha fruticosa  - false indigo
Amorpha ouachitensis  - Ouachita Mountain leadplant
Ampelopsis brevipedunculata  - amur peppervine   ( T&T-2 )
Amsonia 'Blue Ice'  - blue star   ( T&T-6 )
Amsonia ciliata  - blue star
Amsonia hubrichtii  - blue star   ( POM ,   T&T-6 )
Amsonia illustris  - shining blue star   ( T&T-4 )
Amsonia 'Seaford Skies'  - blue star
Amsonia tabernaemontana  - blue star   ( POM ,   T&T-5 )
Amsonia tabernaemontana 'Short Stack'  - dwarf blue star   ( T&T-1 )
Anagallis monelli  - blue pimpernel
Ananas comosus  - pineapple
Ananas comosus var. variegatus  - variegated pineapple
Anaphalis margaritacea  - pearly everlasting
Anaphalis triplinervis  - pearly everlasting   ( T&T-1 )
Anchusa azurea  - blue bugloss
Anchusa azurea 'Dropmore'  - blue bugloss   ( T&T-1 )
Andropogon gerardii  - big blue stem   ( T&T-2 )
Andropogon glomeratus  - bushy bluestem   ( T&T-1 )
Anemone americana  - Roundleaf Liverleaf   ( T&T-2 )
Anemone blanda  - windflower   ( T&T-4 )
Anemone blanda 'Blue Star'  - windflower   ( T&T-3 )
Anemone blanda 'White Splendour'  - windflower   ( T&T-1 )
Anemone canadensis  - windflower   ( T&T-6 )
Anemone coronaria  - windflower   ( T&T-1 )
Anemone cylindrica  - windflower
Anemone hupehensis  - Japanese thimbleweed   ( T&T-2 )
Anemone hupehensis var. japonica 'Pamina'  - Japanese anemone   ( T&T-1 )
Anemone × hybrida 'Honorine Jobert'  - windflower   ( POM ,   T&T-8 )
Anemone × hybrida 'Lady Gilmour'  - windflower   ( T&T-1 )
Anemone × lesseri  - windflower
Anemone narcissiflora  - windflower   ( T&T-1 )
Anemone nemorosa  - windflower
Anemone nemorosa 'Lychette'  - wood anemone
Anemone parviflora  - small-flowered anemone
Anemone sylvestris  - snowdrop windflower   ( T&T-4 )
Anemone tomentosa  - windflower
Anemone virginiana  - thimbleweed   ( T&T-2 )
Anethum graveolens  - dill   ( T&T-2 )
Angelica archangelica  - garden angelica
Angelica atropurpurea  - masterwort
Angelonia angustifolia  - angelonia   ( T&T-7 )
Angelonia angustifolia SERENA MIXTURE  - angelonia   ( POM ,   T&T-5 )
Anigozanthos flavidus  - tall kangaroo paw
Annona muricata  - soursop
Annona reticulata  - custard apple
Anomatheca laxa  - anomatheca
Anredera cordifolia  - heartleaf madeiravine
Antennaria dioica  - pussytoes
Antennaria neglecta  - field pussytoes
Antennaria parlinii  - pussy toes
Antennaria plantaginifolia  - pussytoes   ( T&T-4 )
Anthemis tinctoria  - golden chamomile
Anthemis tinctoria 'Kelwayi'  - Dyer's chamomile
Anthemis tinctoria 'Moonlight'  - golden marguerite   ( T&T-1 )
Anthericum liliago  - St. Bernard's lily   ( T&T-1 )
Anthurium andraeanum  - anthurium
Antigonon leptopus  - coral vine
Antirrhinum majus  - snapdragon   ( T&T-4 )
Aphelandra squarrosa  - zebra plant
Apocynum cannabinum  - Indian hemp
Aponogeton distachyos  - Cape pondweed
Aquilegia 'Bunting'  - columbine   ( T&T-1 )
Aquilegia caerulea  - columbine   ( T&T-1 )
Aquilegia canadensis  - columbine   ( T&T-5 )
Aquilegia 'Dove'  - columbine   ( T&T-1 )
Aquilegia flabellata  - fan columbine
Aquilegia flabellata var. pumila  - fan columbine   ( T&T-1 )
Aquilegia fragrans  - sweet-scented columbine
Aquilegia glandulosa  - columbine
Aquilegia (McKana Group)  - columbine   ( T&T-7 )
Aquilegia 'Music Mix'  - columbine
Aquilegia olympica  - columbine
Aquilegia 'Red Hobbit'  - columbine
Aquilegia 'Remembrance'  - columbine
Aquilegia 'Swallowtail'  - columbine
Aquilegia viridiflora  - columbine
Aquilegia vulgaris  - columbine
Arabis alpina  - mountain rockcress
Arabis caucasica  - Garden Rockcress   ( T&T-2 )
Arachis hypogaea  - peanut
Aralia chinensis  - Chinese angelica tree
Aralia cordata  - Japanese spikenard
Aralia cordata 'Sun King'  - Japanese spikenard
Aralia elata  - Japanese angelica tree   ( T&T-1 )
Aralia racemosa  - American spikenard   ( POM ,   T&T-3 )
Aralia spinosa  - Devil's walking stick   ( T&T-2 )
Araucaria araucana  - monkey-puzzle tree
Araucaria columnaris  - New Caledonian pine
Araucaria heterophylla  - Norfolk Island pine
Arbutus unedo  - strawberry tree
Arctostaphylos uva-ursi  - common bearberry
Arctostaphylos uva-ursi 'Big Bear'  - common bearberry   ( T&T-1 )
Arctostaphylos uva-ursi 'Massachusetts'  - common bearberry   ( T&T-1 )
Arctotis × hybrida  - African daisy
Ardisia crenata  - hen's eyes
Ardisia elliptica  - shoebutton
Ardisia japonica  - marlberry
Argania spinosa  - Argan tree
Argemone polyanthemos  - prickly poppy   ( T&T-1 )
Argyranthemum frutescens  - cobbitty daisy   ( T&T-1 )
Argyrocytisus battandieri  - Moroccan broom
Arisaema dracontium  - dragon root   ( T&T-2 )
Arisaema engleri  - arisaema
Arisaema kishidae 'Silver Pattern'  - Japanese cobra lily
Arisaema kiushianum  - arisaema
Arisaema ringens  - arisaema
Arisaema serratum  - arisaema
Arisaema sikokianum  - Japanese cobra lily
Arisaema thunbergii  - arisaema
Arisaema triphyllum  - jack-in-the-pulpit   ( T&T-3 )
Arisarum proboscideum  - mouse plant
Aristolochia clematitis  - birthwort
Aristolochia gigantea  - pelican flower
Aristolochia leuconeura  - birthwort
Aristolochia littoralis  - calico flower
Aristolochia macrophylla  - Dutchman's pipe
Aristolochia tomentosa  - Dutchman's pipe   ( POM ,   T&T-2 )
Armeria maritima  - sea thrift   ( T&T-2 )
Armeria maritima 'Alba'  - sea thrift
Armeria 'Nifty Thrifty'  - sea thrift
Armoracia rusticana  - horseradish   ( T&T-2 )
Arnoglossum atriplicifolium  - pale Indian plantain   ( T&T-1 )
Arnoglossum reniforme  - great Indian plantain   ( T&T-1 )
Aronia arbutifolia  - chokeberry   ( T&T-3 )
Aronia melanocarpa  - black chokeberry   ( T&T-2 )
Aronia melanocarpa 'Autumn Magic'  - black chokeberry   ( POM ,   T&T-2 )
Aronia melanocarpa 'Estland'  - black chokeberry
Aronia melanocarpa 'Professor Ed'  - black chokeberry
Aronia melanocarpa var. elata  - black chokeberry
Aronia melanocarpa 'Viking'  - black chokeberry
Aronia × prunifolia  - purple-fruited chokeberry
Artemisia abrotanum  - southernwood
Artemisia absinthium  - wormwood   ( T&T-1 )
Artemisia afra  - mugwort
Artemisia capillaris  - wormwood
Artemisia dracunculus  - tarragon
Artemisia dracunculus 'Sativa'  - French tarragon   ( T&T-1 )
Artemisia frigida  - silky wormwood
Artemisia lactiflora (Guizhou Group)  - white mugwort   ( T&T-3 )
Artemisia ludoviciana  - white sage
Artemisia ludoviciana 'Silver Frost'  - western mugwort   ( T&T-2 )
Artemisia 'Powis Castle'  - wormwood   ( T&T-7 )
Artemisia vulgaris  - mugwort
Artocarpus altilis  - breadfruit
Arum italicum  - Italian arum   ( T&T-4 )
Aruncus aethusifolius  - goat's beard   ( T&T-1 )
Aruncus dioicus  - goat's beard   ( POM ,   T&T-8 )
Aruncus dioicus 'Kneiffii'  - goatsbeard   ( T&T-2 )
Aruncus 'Horatio'  - aruncus
Aruncus 'Misty Lace'  - aruncus   ( T&T-4 )
Arundina graminifolia  - bamboo orchid
Arundinaria gigantea  - giant cane bamboo   ( T&T-1 )
Arundo donax  - giant reed   ( T&T-1 )
Asarina procumbens  - trailing snapdragon
Asarum canadense  - wild ginger   ( POM ,   T&T-8 )
Asarum caudatum  - wild ginger
Asarum europaeum  - European wild ginger
Asarum shuttleworthii  - wild ginger
Asclepias curassavica  - blood flower   ( POM ,   T&T-5 )
Asclepias hirtella  - prairie milkweed
Asclepias incarnata  - swamp milkweed   ( T&T-7 )
Asclepias incarnata 'Ice Ballet'  - swamp milkweed   ( T&T-4 )
Asclepias incarnata 'Soulmate'  - swamp milkweed   ( T&T-2 )
Asclepias purpurascens  - purple milkweed   ( T&T-3 )
Asclepias quadrifolia  - fourleaf milkweed
Asclepias speciosa  - showy milkweed   ( T&T-2 )
Asclepias sullivantii  - prairie milkweed   ( T&T-1 )
Asclepias syriaca  - common milkweed
Asclepias tuberosa  - butterfly weed   ( T&T-13 )
Asclepias tuberosa 'Hello Yellow'  - butterfly weed   ( T&T-3 )
Asclepias verticillata  - whorled milkweed
Asclepias viridis  - green milkweed
Asimina triloba  - pawpaw   ( POM ,   T&T-4 )
Asparagus densiflorus  - Sprenger's asparagus fern
Asparagus officinalis  - asparagus
Asparagus retrofractus  - Ming fern
Asparagus setaceus  - asparagus fern
Asperula gussonii  - woodruff
Asphodeline lutea  - king's spear
Asphodelus albus  - white-flowered asphodel
Aspidistra elatior  - cast-iron plant
Asplenium × ebenoides  - walking spleenwort   ( T&T-1 )
Asplenium nidus  - bird's nest fern
Asplenium platyneuron  - ebony spleenwort   ( T&T-1 )
Asplenium scolopendrium  - hart's tongue fern
Aster alpinus  - Alpine aster
Aster 'Celeste'  - michaelmas daisy   ( T&T-1 )
Aster tataricus  - tartarian aster   ( T&T-2 )
Aster tataricus 'Jindai'  - tatarian aster   ( T&T-1 )
Aster 'Wood's Purple'  - aster   ( T&T-6 )
Asteriscus maritimus  - astericus
Astilbe × arendsii 'Fanal'  - astilbe   ( T&T-8 )
Astilbe chinensis 'Diamonds and Pearls'  - Chinese astilbe   ( T&T-2 )
Astilbe chinensis 'Finale'  - Chinese astilbe   ( T&T-3 )
Astilbe chinensis 'Love and Pride'  - Chinese astilbe   ( T&T-1 )
Astilbe chinensis var. davidii  - Chinese astilbe
Astilbe chinensis var. pumila  - Chinese astilbe   ( POM ,   T&T-7 )
Astilbe chinensis 'Vision in Red'  - Chinese astilbe   ( T&T-5 )
Astilbe chinensis 'Visions'  - Chinese astilbe   ( T&T-9 )
Astilbe 'Deutschland'  - astilbe   ( T&T-7 )
Astilbe 'Erica'  - astilbe   ( T&T-1 )
Astilbe 'Federsee'  - astilbe   ( T&T-1 )
Astilbe 'Flamingo'  - astilbe
Astilbe 'Radius'  - astilbe
Astilbe 'Red Sentinel'  - astilbe   ( T&T-1 )
Astilbe 'Rheinland'  - astilbe   ( T&T-10 )
Astilbe 'Snowdrift'  - astilbe   ( T&T-2 )
Astilbe 'Sprite'  - astilbe   ( T&T-6 )
Astilboides tabularis  - astilboides
Astrantia 'Buckland'  - greater masterwort
Astrantia 'Magnum Blush'  - greater masterwort
Astrantia major  - greater masterwort   ( T&T-1 )
Astrantia major 'Claret'  - masterwort
Astrantia major 'Roma'  - masterwort
Astrantia major 'Rubra'  - masterwort
Astrantia major 'Ruby Cloud'  - greater masterwort
Astrantia major 'Venice'  - masterwort
Astrantia 'Snow Star'  - masterwort
Astrantia 'Superstar'  - greater masterwort
Athyrium 'Branford Rambler'  - Japanese painted fern
Athyrium filix-femina  - lady fern   ( T&T-5 )
Athyrium filix-femina var. angustum  - northern lady fern
Athyrium 'Ghost'  - lady fern   ( POM ,   T&T-8 )
Athyrium niponicum var. niponicum  - painted lady fern   ( T&T-4 )
Athyrium niponicum var. pictum  - Japanese painted fern   ( T&T-9 )
Athyrium niponicum var. pictum 'Burgundy Lace'  - Japanese painted fern   ( T&T-3 )
Athyrium niponicum var. pictum 'Silver Falls'  - Japanese painted fern   ( T&T-2 )
Athyrium niponicum var. pictum 'Ursula's Red'  - Japanese painted fern   ( T&T-2 )
Athyrium 'Ocean's Fury'  - hybrid painted fern
Athyrium otophorum  - eared lady fern
Athyrium 'Silver Slippers'  - Japanese painted fern
Athyrium thelypterioides  - lady fern   ( T&T-2 )
Athyrium vidalii  - lady fern
Atriplex hortensis  - mountain spinach
Atropa belladonna  - deadly nightshade
Aucuba japonica  - spotted laurel
Aucuba japonica 'Variegata'  - spotted laurel
Aurinia saxatilis  - basket-of-gold   ( T&T-3 )
Aurinia saxatilis 'Gold Dust'  - basket of gold
Averrhoa carambola  - star fruit
Azara microphylla  - azara
Azara serrata  - saw toothed azara
Azara serrata ANDEAN GOLD  - saw toothed azara
Azolla filiculoides  - water fern