Abelmoschus manihot Abromeitiella brevifolia
Acaena 'Breisgau' Acaena microphylla
Acalypha repens Acanthocereus tetragonus
Acanthocereus undulosus Acanthus balcanicus
Acanthus mollis Acanthus mollis 'Fielding Gold'
Acanthus mollis 'Variegatus' Acanthus montanus
Acanthus spinosus Achillea 'Anthea'
Achillea 'Coronation Gold' Achillea 'Pink Grapefruit'
Achillea 'Pomegranate' Achillea 'Red Velvet'
Achillea 'Schwellenberg' Achillea 'Sunny Seduction'
Achillea aegyptiaca Achillea ageratum
Achillea clavennae Achillea filipendulina
Achillea filipendulina 'Credo' Achillea filipendulina 'Parker's Variety'
Achillea x lewisii 'King Edward' Achillea millefolium
Achillea millefolium 'Apple Blossom' Achillea millefolium 'Cerise Queen'
Achillea millefolium 'Colorado' Achillea millefolium 'Fanal'
Achillea millefolium 'Fire King' Achillea millefolium 'Fireland'
Achillea millefolium 'Heidi' Achillea millefolium 'Hoffnung'
Achillea millefolium 'Moonshine' Achillea millefolium 'Ortel's Rose'
Achillea millefolium 'Paprika' Achillea millefolium 'Pink Deb'
Achillea millefolium 'Red Beauty' Achillea millefolium 'Snowsport'
Achillea millefolium 'Summer Pastels' Achillea millefolium 'Summerwine'
Achillea millefolium 'Terra Cotta' Achillea millefolium 'Weser River Sandstone'
Achillea millefolium 'White Beauty' Achillea ptarmica 'Nana Compacta'
Achillea ptarmica 'The Pearl' Achillea tomentosa
Achillea tomentosa 'Maynard's Gold' Achimenes longiflora
Aciphylla glaucescens Acmella oleracea
Acmella oleracea 'Peek A Boo' Aconitum 'Blue Sceptre'
Aconitum x cammarum Aconitum x cammarum 'Eleanor'
Aconitum x cammarum 'Stainless Steel' Aconitum carmichaelii
Aconitum napellus Aconitum napellus 'Album'
Aconitum napellus 'Bi-color' Aconitum uncinatum
Acorus calamus 'Variegatus' Acorus gramineus
Acorus gramineus 'Aureopusillus Minimus' Acorus gramineus 'Masamune'
Acorus gramineus 'Ogon' Acorus gramineus 'Variegatus'
Acrostichum danaeifolium Actaea racemosa
Actaea racemosa 'Brunette' Actaea rubra
Actaea simplex 'Black Negligee' Actaea simplex 'Hillside Black Beauty'
Actaea simplex 'White Pearl' Adenophora confusa
Adenophora liliifolia Adenophora stricta
Adiantum capillus-veneris Adiantum macrophyllum
Adiantum pedatum Adiantum raddianum
Adiantum trapeziforme var. braziliense Adiantum venustum
Adonis vernalis Adromischus triflorus