Weeds: Field bindweed (Wild morningglory) – Convolvulus arvensis Categories: Broadleaf F-H Weeds Last review date: 2026-06-07 04:00 Scientific name: Convolvulus arvensis Family: Convolvulaceae Cycle: Perennial Plant type: Broadleaf Field bindweed flowers and leaves Photo by: D.G. Swan Biology Field bindweed is a prostrate or twining weed which spreads by seed and by new plants arising […]
Weeds: Field pennycress (Fanweed) – Thlaspi arvense Categories: Broadleaf F-H Weeds Last review date: 2026-06-07 08:55 Scientific name: Thlaspi arvense Family: Brassicaceae (Cruciferae) Cycle: Annual Plant type: Broadleaf Field pennycress fruits Photo by: D.G. Swan Biology Field pennycress grows six to eighteen inches tall, branching mainly in the upper, flowering portion of the plant. The […]
Weeds: Flixweed – Descurainia sophia Categories: Broadleaf F-H Weeds Last review date: 2026-06-07 04:13 Scientific name: Descurainia sophia Family: Brassicaceae (Cruciferae) Cycle: Annual Plant type: Broadleaf Flixweed stem and flower head Photo by: J.A. Kropf Biology Seedling flixweed plants consist of a low-growing rosette of finely divided, fern-like leaves from a taproot. Mature plants are […]
Weeds: Foxtail (Green, Yellow, Bristly) – Setaria spp. Categories: F-H Grasses Weeds Last review date: 2026-06-07 10:04 Scientific name: Setaria spp. Family: Poaceae (Graminae) Cycle: Annual Plant type: Grass Yellow foxtail Photo by: D.G. Swan Biology Three species of foxtails are found in the Pacific Northwest: green foxtail (S. viridis), yellow foxtail (Setaria pumila), and […]
Weeds: Garden loosestrife – Lysimachia vulgaris Categories: Broadleaf F-H Weeds Last review date: 2026-06-07 06:18 Scientific name: Lysimachia vulgaris Family: Primulaceae Cycle: Perennial Plant type: Broadleaf Garden loosestrife, flowering Photo by: King County Noxious Weed Control Program Biology Garden loosestrife is an erect rhizomatous perennial that may attain a height of three feet or more. […]
Weeds: Giant hogweed – Heracleum mantegazzianum Categories: Broadleaf F-H Weeds Last review date: 2026-06-07 04:30 Scientific name: Heracleum mantegazzianum Family: Apiaceae (Umbelliferae) Cycle: Perennial Plant type: Broadleaf Giant hogweed Photo by: Washington Noxious Weed Control Board Biology Giant hogweed is a short-lived perennial plant, typically surviving 2 to 5 years. The hollow stems are robust […]
Weeds: Goldenrods – Solidago spp. Categories: Broadleaf F-H Weeds Last review date: 2026-06-07 08:23 Scientific name: Solidago spp. Family: Asteraceae (Compositae) Cycle: Perennial Plant type: Broadleaf Goldenrod with flowers Photo by: T.W. Miller Biology Most goldenrod species spread by both seeds and by creeping root systems. They are upright plants, growing one to four feet […]
Weeds: Ground ivy – Glechoma hederacea Categories: Broadleaf F-H Weeds Last review date: 2026-06-07 04:25 Scientific name: Glechoma hederacea Family: Lamiaceae Cycle: Perennial Plant type: Broadleaf Ground Ivy Photo by: Mike Dickison 4.0/deed.en Biology Ground ivy is an aromatic evergreen creeper of the mint family. The leaf produces an aroma when crushed. It may become […]
Weeds: Groundsel, common – Senecio vulgaris Categories: Broadleaf F-H Weeds Last review date: 2026-06-07 07:57 Scientific name: Senecio vulgaris Family: Asteraceae (Compositae) Cycle: Annual/Biennial Plant type: Broadleaf Common groundsel with seed heads Photo by: R. Parker Biology Common groundsel may reach four to eighteen inches tall. Seedlings are small rosettes of deeply notched or lobed […]
Weeds: Hawkweeds – Hieracium spp. Categories: Broadleaf F-H Weeds Last review date: 2026-06-07 04:33 Scientific name: Hieracium spp. Family: Asteraceae (Compositae) Cycle: Perennial Plant type: Broadleaf Orange hawkweed flowerheads Photo by: T.W. Miller Biology Hawkweeds are fibrous rooted perennial herbs that grow up to a foot tall. The leaves are basal, with an occasional leaf […]
