| Latin Name | Common Name | Edibility Rating | Medicinal Rating |
| Acaenia anserinifolia | Pirri-Pirri Bur | 1 | 1 |
| Acanthus mollis | Bear's Breeches | 0 | 2 |
| Achillea millefolium | Yarrow, Boreal yarrow, California yarrow, Giant yarrow, Coast yarrow, Western yarrow, Pacific yarrow | 3 | 4 |
| Acinos arvensis | Basil Thyme | 2 | 1 |
| Acorus gramineus | Grass-leaved Sweet Rush, Japanese Sweet Flag, Dwarf Sweet Flag | 3 | 3 |
| Adiantum pedatum | Northern Maidenhair,American Maidenhair Fern | 0 | 2 |
| Adiantum venustum | Evergreen Maidenhair Fern | 0 | 1 |
| Aegopodium podagraria | Ground Elder, Bishop's goutweed, Goutweed, Ground Elder, Bishop's Weed | 3 | 2 |
| Aesculus parviflora | Bottlebrush buckeye | 2 | 1 |
| Ajuga australis | Australian Bugle | 0 | 1 |
| Ajuga reptans | Bugle, Common Bugelweed, Bugleweed, Carpet Bugleweed, Carpetweed, Carpet Bugle | 2 | 3 |
| Akebia quinata | Akebia, Chocolate vine, Fiveleaf Akebia, Chocolate Vine | 4 | 2 |
| Alchemilla xanthochlora | Lady's Mantle | 2 | 3 |
| Androsace sarmentosa | Rock Jasmine | 0 | 2 |
| Antennaria dioica | Catsfoot, Stoloniferous pussytoes | 0 | 2 |
| Arabis caucasica | Rock Cress, Wall Rockcress | 2 | 0 |
| Arctostaphylos nevadensis | Pine-Mat Manzanita | 2 | 1 |
| Arctostaphylos uva-ursi | Bearberry | 3 | 4 |
| Arisarum vulgare | Friar's Cowl | 2 | 0 |
| Armeria maritima | Sea Thrift, Thrift seapink, California seapink, Interior seapink, Siberian sea thrift | 1 | 1 |
| Artemisia ludoviciana | White Sage, Louisiana Sage, Prairie Sage, Western Mugwort | 2 | 2 |
| Artemisia stelleriana | Beach Wormwood, Oldwoman, Dusty Miller | 1 | 0 |
| Aruncus dioicus | Goat's Beard, Bride's feathers | 2 | 2 |
| Asarum canadense | Snake Root, Canadian wildginger, Canada Wild Ginger, Wild Ginger | 3 | 3 |
| Asarum caudatum | Wild Ginger, British Columbia wildginger | 3 | 2 |
| Asarum europaeum | Asarabacca, European Wild Ginger | 0 | 2 |
| Asarum shuttleworthii | Asarabacca, Mottled Wild Ginger | 2 | 0 |
| Aspidistra elatior | Aspidistra, Cast Iron Plant | 0 | 2 |
| Asplenium scolopendrium | Hart's Tongue Fern | 0 | 2 |
| Aster macrophyllus | Bigleaf Aster | 2 | 1 |
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