| Aaron's Rod |
Verbascum thapsus |
 |
| Abyssinian Banana |
Musa ensete |
 |
| Abyssinian Mustard |
Crambe abyssinica |
|
| African Daisy |
Arctotis hirsuta |
|
| African Daisy |
Arctotis venusta |
 |
| African Daisy |
Dimorphotheca sinuata |
 |
| African Daisy |
Venidium fastuosum |
|
| African Hemp |
Sparmannia africana |
 |
| African Iris |
Dietes bicolor |
|
| African Lily (many) |
Agapanthus |
|
| African Lily |
Agapanthus |
|
| African Marigold |
Tagetes erecta |
|
| African Tulip Tree |
Spathodea campanulata |
|
| African Walnut |
Schotia brachypetala |
|
| Agastache (many) |
Agastache |
|
| Agrimony |
Agrimonia eupatoria |
 |
| Alpine Bellflower |
Campanula alpestris |
|
| Alpine Bells |
Cortusa matthioli |
|
| Alpine Cress |
Hutchinsia (Pritzelago) alpina |
|
| Alpine Milkvetch |
Astragalus alpinus |
|
| Alpine Sandwort |
Minuartia obtusiloba |
|
| Alpine Sea Holly |
Eryngium alpinum |
|
| Alpine Snowbell |
Soldanella alpina |
|
| Amaryllis |
Hippeastrum |
|
| Amur Maple |
Acer ginnala |
|
| Angelica |
Angelica taiwaniana |
|
| Angel's Fishing Rod |
Dierama 'Snowbells' |
|
| Angel's Trumpet (many) |
Datura |
|
| Angel's Trumpet |
Datura metelloides |
|
| Anise Hyssop |
Agastache |
|
| Anise Hyssop |
Agastache foeniculum |
|
| Annual Baby's Breath |
Gypsophila elegans |
|
| Annual Chrysanthemum |
Chrysanthemum carinatum |
|
| Annual Mallow |
Malope trifida grandiflora |
|
| Annual Phlox |
Phlox drummondii |
|
| Apache Beggarticks |
Bidens ferulifolia |
|
| Argentine Pear |
Iochroma australis |
|
| Arum Lily |
Zantedeschia |
|
| Arum Lily |
Zantedeschia 'Kiwi Blush' |
|
| Asparagus Fern |
Asparagus plumosus nanus |
|
| Asphodel |
Asphodelus fistulosus |
|
| Assyrian Plum |
Cordia myxa |
|
| Aster |
Aster |
|
| Astilbe |
Astilbe |
|
| Aubrietia |
Aubrieta |
|
| Auricula |
Primula auricula |
|
| Australian Native Frangipani |
Hymenosporum flavum |
|
| Autumn Daffodil |
Sternbergia lutea |
|
| Autumn Squill |
Scilla autumnalis |
|
| Avens |
Geum chiloense |
|
