| Common Name | Latin Name |
|---|---|
| Ajuga | see Bugleweed |
| Allegheny Blackberry | see Smooth Blackberry |
| Alligatorweed | Alternanthera philoxeroides |
| American Bellflower | Campanulastrum americanum |
| American Burnweed | see Fireweed |
| American Elder | see Elderberry |
| American Lotus | Nelumbo lutea |
| American Speedwell | Veronica americana |
| American Water Plantain | Alisma subcordatum |
| American Water Willow | see Water Willow |
| American brooklime | see American Speedwell |
| Amur honeysuckle | see Bush Honeysuckle |
| Annual Bluegrass | Poa annua |
| Annual Fleabane | Erigeron annuus |
| Annual Jewgrass | see Japanese Stiltgrass |
| Annual Marshelder | Iva annua |
| Annual Rye | see Annual Ryegrass |
| Annual Ryegrass | Lolium multiflorum |
| Annual Sowthistle | Sonchus oleraceus |
| Annual Wormwood | Artemisia annua |
| Apple-of-Peru | Nicandra physalodes |
| Arabidopsis | see Mouse-ear Cress |
| Arrow-leaved Tearthumb | Polygonum sagittatum |
| Arrowleaf Knotweed | see Arrow-leaved Tearthumb |
| Arrowleaf Sida | Sida rhombifolia |
| Arrowleaf Smartweed | see Arrow-leaved Tearthumb |
| Arrowvine | see Arrow-leaved Tearthumb |
| Asian Dayflower | see Marsh Dayflower |
| Asian Spiderwort | see Marsh Dayflower |
| Asiatic Dayflower | Commelina communis |
| Aunt Lucy | Ellisia nyclelea |
| Autumn Clematis | see Virgin's Bower |
| Autumn Olive | Elaeagnus umbellata |
