Weeds: Annual bluegrass – Poa annua Categories: A-B Grasses Weeds Last review date: 2026-06-07 09:38 Scientific name: Poa annua Family: Poaceae (Graminae) Cycle: Annual/Perennial Plant type: Grass Annual bluegrass Photo by: T. Miller Biology Annual bluegrass leaves are folded in the bud and have a distinct midvein. The leaves are about 1⁄8 inch wide and […]
Weeds: Barnyardgrass – Echinochloa crus-galli Categories: A-B Grasses Weeds Last review date: 2026-06-07 09:41 Scientific name: Echinochloa crus-galli Family: Poaceae (Graminae) Cycle: Summer annual Plant type: Grass Barnyardgrass Photo by: J.A. Kropf Biology Barnyardgrass grows in clumps up to five feet tall. Leaf blades are smooth, flat, and broad (about 1⁄2 inch or more) with […]
Weeds: Bentgrass, creeping – Agrostis stolonifera Categories: A-B Grasses Weeds Last review date: 2026-06-07 09:42 Scientific name: Agrostis stolonifera Family: Poaceae (Graminae) Cycle: Perennial Plant type: Grass Creeping bentgrass Photo by: B.M. Johnson Biology Creeping bentgrass is a low-growing, perennial grass. Unmowed plants can reach 8 to 20 inches in height. The leafy stolons lie […]
Weeds: Bermudagrass – Cynodon dactylon Categories: A-B Grasses Weeds Last review date: 2026-06-07 09:51 Scientific name: Cynodon dactylon Family: Poaceae (Graminae) Cycle: Perennial Plant type: Grass Bermudagrass blades Photo by: D.G. Swan Biology Bermudagrass is a warm-season perennial grass that typically is prostrate and spreads to form dense patches. Spread occurs by both rhizomes and […]
Weeds: Birdfoot Trefoil – Lotus corniculatus Categories: A-B Broadleaf Weeds Last review date: 2026-06-07 06:15 Scientific name: Lotus corniculatus Family: Fabaceae Cycle: Perennial Plant type: Broadleaf Birdfoot Trefoil flowers Photo by: Albert Herring CC 2.0 Biology Lotus corniculatus can be identified by its unique shaped leaves that alternate on the main stem, are trifoliate (3 […]
Weeds: Bittercress (Shotweed, Hairy bittercress) – Cardamine hirsuta Categories: A-B Broadleaf Weeds Last review date: 2026-06-07 03:12 Scientific name: Cardamine hirsuta Family: Brassicaceae (Cruciferae) Cycle: Winter annual Plant type: Broadleaf Hairy bittercress rosette (1) Photo by: T.W. Miller Biology Little bittercress is a fall/winter-germinating annual species growing to less than five inches tall. Leaves are […]
Weeds: Bittersweet nightshade (European bittersweet) – Solanum dulcamara Categories: A-B Broadleaf Weeds Last review date: 2026-06-07 08:03 Scientific name: Solanum dulcamara Family: Solanaceae Cycle: Perennial Plant type: Broadleaf Bittersweet nightshade fruits Photo by: T.W. Miller Biology Bittersweet nightshade is a trailing to climbing, viny plant with stems reaching up to ten feet. The dark green […]
Weeds: Black medic – Medicago lupulina Categories: A-B Broadleaf Weeds Last review date: 2026-06-07 06:42 Scientific name: Medicago lupulina Family: Fabaceae (Leguminosae) Cycle: Annual Plant type: Broadleaf Black medic stem and leaves Photo by: T.W. Miller Biology Black medic is very clover-like in appearance and is sometimes called Japanese clover. Leaves are alternate on the […]
Weeds: Blackberry (Himalayan, Evergreen, Pacific) – Rubus spp. Categories: A-B Broadleaf Weeds Last review date: 2026-06-07 07:11 Scientific name: Rubus spp. Family: Rosaceae Cycle: Perennial Plant type: Broadleaf Blackberry fruit Photo by: T.W. Miller Biology Several species of blackberries may be considered weeds. Among these are evergreen or cutleaf blackberry (Rubus laciniatus), the native dewberry […]
Weeds: Blue mustard (Purple mustard, Tenella mustard) – Chorispora tenella Categories: A-B Broadleaf Weeds Last review date: 2026-06-07 03:24 Scientific name: Chorispora tenella Family: Brassicaceae (Cruciferae) Cycle: Winter annual Plant type: Broadleaf Blue mustard with flowers Photo by: J.A. Kropf Biology Blue mustard is a leafy, taprooted winter annual. Plants branch primarily from the base, […]
