UMass Extension Weed Herbarium
| Common Name | Scientific Name | Family Name | |
|---|---|---|---|
| false hellebore, green | Veratum viride | Liliaceae - Lily Family | |
| false hellebore, green | Veratrum viride | Liliaceae - Lily Family | |
| fat hen | see - lambsquarters, common | ||
| fennel, tall | see - dogfennel | ||
| fescue, tall | Festuca arundinacea | Poaceae (Gramiae) - Grass Family | |
| fescue, tall | Festuca arundinacea | Poaceae (Graminae) - Grass Family | |
| fieldcress, prostrate | Rorippa x prostrata | Brassicaceae (Cruciferae) - Mustard Family | |
| figwort, common | Scrophularia nodosa | Scrophulariaceae - Figwort Family | |
| figwort, knotted | see - figwort, common | ||
| filaree, redstem | Erodium cicutarium | Geraniaceae - Geranium Family | |
| fireweed | Epilobium angustifolium | Onagraceae - Evening Primrose Family | |
| fireweed | see - kochia | ||
| fireweed, Mexican | see - kochia | ||
| flannelleaf | see - mullein, common | ||
| fleabane | Erigeron pulchellus | Asteraceae (Compositae) - Aster or Sunflower Family | |
| fleabane, annual | Erigeron annuus | Asteraceae (Compositae) - Aster or Sunflower Family | |
| flower-of-an-hour | see - mallow, Venice | ||
| four-o'-clock, wild | Mirabilis nyctaginea | Nyctaginaceae - Four-O'clock Family | |
| foxtail, giant | Setaria faberi | Poaceae (Graminae) - Grass Family | |
| foxtail, golden | see - foxtail, yellow | ||
| foxtail, meadow | Alopecurus pratensis | Poaceae (Graminae) - Grass Family | |
| foxtail, yellow | Setaria glauca | Poaceae (Graminae) - Grass Family |