A – A
| Achillea millefolium | Yarrow |
| Acorus calamus | Calamus |
| Aesculus hippocastanum | Horse chestnut, Conker tree |
| Agrimonia eupatoria | Sticklewort |
| Agropyron repens | Quackgrass, Couch grass |
| Alchemilla vulgáris | Common lady’s mantle |
| Alkanna tinctoria | Alkanet, Dyer’s alkanet, Dyer’s bugloss |
| Althaea Officinalis | Marsh Mallow |
| Althaea Rosea | Hollyhock |
| Amygdalus communis | Almond |
| Anemone hepatica | Pennywort |
| Anemone pulsatilla | European pasqueflower |
| Anethum graveolens | Dill |
| Angelica archangelica | Angelica |
| Anisurn Vulgare | Anise |
| Antennaria dioica | Cat’s Foot |
| Anthemis nobilis | Chamomile |
| Anthriscus cerefolium | Chervil |
| Anthyllis vulneraria | Woundwort |
| Archangelica Officinalis | Wild Celery |
| Arctium major | Edible Burdock |
| Arctium minus | Common Burdock |
| Arctium tomentosum | Woolly Burdock, Downy burdock |
| Arctostaphylos uva-ursi | Kinnikinnick |
| Aristolochia clematitis | Birthwort |
| Arnica montana | Wolf’s bane |
| Artemisia absinthium | Wormwood |
| Artemisia dracunculus | Tarragon |
| Artemisia maritima | Sea Wormwood |
| Artemisia vulgaris | Common Wormwood |
| Asarum europaeum | Hazelwort |
| Asperula odorata | Woodruff |
| Aspidium filix mas | Male Fern |
| Atropa belladonna | Belladonna |