| Latin Name | Common Name | Habit | Height | Hardiness | Growth | Soil | Shade | Moisture | Edible | Medicinal | Other |
| Achillea ageratum | Mace, Sweet-nancy | Perennial | 0.6 |
6-9
| | LMH | N | DM | 2 | 0 | |
| Achillea erba-rotta moschata | Musk Milfoil | Perennial | 0.2 |
5-9
| | LMH | N | DM | 0 | 2 | |
| Achillea millefolium | Yarrow, Boreal yarrow, California yarrow, Giant yarrow, Coast yarrow, Western yarrow, Pacific yarrow | Perennial | 0.6 |
4-8
| F | LMH | SN | DM | 3 | 4 | 4 |
| Achillea ptarmica | Sneeze-Wort, Sneezeweed | Perennial | 0.6 |
3-9
| F | LMH | N | M | 2 | 1 | 2 |
| Achillea santolina | | Perennial | 0.3 |
-
| | LMH | N | DM | 0 | 1 | 1 |
| Achillea sibirica | Siberian Yarrow | Perennial | 0.5 |
5-9
| | LMH | N | DM | 1 | 1 | |
| Acmella oleracea | Toothache plant, Paracress | Perennial | 0.4 |
9-11
| F | LMH | N | M | 3 | 3 | 2 |
| Acourtia microcephala | Sacapellote | Perennial | 1.4 |
7-10
| | LM | N | DM | 0 | 1 | |
| Actinea acaulis arizonica | | | 0.0 |
-
| | LMH | SN | M | 0 | 0 | |
| Ageratina altissima | White Snakeroot, Richweed | Perennial | 2.0 |
5-9
| | LMH | SN | M | 0 | 2 | 0 |
| Ageratina aromatica | | Perennial | 1.5 |
4-8
| | LMH | SN | M | 1 | 1 | |
| Ageratina herbacea | Fragrant Snakeroot | Perennial | 2.0 |
5-9
| | LMH | SN | M | 0 | 1 | |
| Ageratina ligustrina | | Shrub | 5.0 |
9-11
| | LMH | N | M | 0 | 0 | |
| Ageratina occidentalis | Western Snakeroot | Perennial | 0.7 |
5-9
| | LMH | SN | M | 0 | 1 | |
| Ageratina rugosum | | | 0.0 |
-
| | LMH | SN | M | 0 | 0 | |
| Ageratum conyzoides | Goatweed, Tropical whiteweed | Annual | 1.0 |
8-11
| | LMH | N | M | 0 | 3 | 2 |
| Ageratum houstonianum | Ageratum, Bluemink, Floss Flower, Garden | Annual | 0.3 |
0-0
| M | LMH | N | DM | 0 | 1 | |
| Agoseris aurantiaca | Mountain Dandelion, Orange agoseris | Perennial | 0.6 |
0-0
| | Lm | N | DM | 2 | 1 | |
| Agoseris glauca | Mountain Dandelion, Pale agoseris, False agoseris | Perennial | 0.6 |
0-0
| | Lm | N | DM | 1 | 1 | 1 |
| Ambrosia artemesiifolia | Roman Wormwood, Bitterweed, Blackweed, Carrot Weed, Hay Fever Weed, Stickeweed, Tassel Weed, Wild Ta | Annual | 0.9 |
4-8
| M | LMH | SN | M | 2 | 3 | 1 |
| Ambrosia trifida | Giant Ragweed, Great ragweed, Texan great ragweed, Bitterweed, Bloodweed, Buffalo Weed, Horse Cane | Annual | 2.0 |
1-11
| M | LMH | SN | M | 1 | 3 | 1 |
| Anacyclus pyrethrum | Mount Atlas Daisy, Chamomile Spanish, Pellitory | Perennial | 0.3 |
5-7
| M | LM | N | M | 0 | 2 | |
| Anaphalis margaritacea | Pearly Everlasting, Western pearly everlasting | Perennial | 0.9 |
3-7
| | LM | SN | DM | 1 | 2 | 1 |
| Antennaria dioica | Catsfoot, Stoloniferous pussytoes | Perennial | 0.1 |
4-8
| | L | N | DM | 0 | 2 | 2 |
| Anthemis arvensis | Corn Chamomile | Annual | 0.4 |
4-8
| | LMH | N | DM | 0 | 2 | 2 |
| Anthemis cotula | Mayweed, Stinking chamomile | Annual | 0.6 |
4-8
| | MH | N | DM | 1 | 2 | 1 |
| Anthemis tinctoria | Yellow Camomile, Golden chamomile, Dyers' Chamomile, Golden Marguerite | Perennial | 0.8 |
4-6
| | LMH | N | DM | 0 | 1 | 2 |
| Arctium lappa | Great Burdock, Gobo | Biennial | 2.0 |
3-7
| | LMH | SN | M | 4 | 5 | 2 |
| Arctium minus | Lesser Burdock | Biennial | 1.0 |
4-8
| | LMH | SN | M | 3 | 5 | 4 |
| Argyranthemum foeniculaceum | | Perennial | 1.0 |
8-11
| | LMH | N | DM | 1 | 0 | |
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