Weeds: Annual bluegrass Categories: A-B Grasses Weeds Last review date: 2026-07-07 05:53 Scientific name: Poa annua Family: Poaceae (Graminae) Cycle: Annual/Perennial Plant type: Grass Other Common Names: Annual meadow grass, Low spear grass, Meadow grass, Six-week grass, Annual blue Annual bluegrass Photo by: T. Miller Biology Annual bluegrass leaves are folded in the bud and […]
Weeds: Barnyardgrass Categories: A-B Grasses Weeds Last review date: 2026-07-07 09:56 Scientific name: Echinochloa crus-galli Family: Poaceae (Graminae) Cycle: Summer annual Plant type: Grass Other Common Names: Barnyard millet 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 […]
Weeds: Bentgrass, creeping Categories: A-B Grasses Weeds Last review date: 2026-07-07 10:05 Scientific name: Agrostis stolonifera Family: Poaceae (Graminae) Cycle: Perennial Plant type: Grass Other Common Names: Carpet bentgrass, Creeping bent, Fiorin Spreading bent Creeping bentgrass Photo by: B.M. Johnson Biology Creeping bentgrass is a low-growing, perennial grass. Unmowed plants can reach 8 to 20 […]
Weeds: Bermudagrass Categories: A-B Grasses Weeds Last review date: 2026-07-07 10:13 Scientific name: Cynodon dactylon Family: Poaceae (Graminae) Cycle: Perennial Plant type: Grass Other Common Names: Bermuda Grass, Hybrid Bermudagrass 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 […]
Weeds: Birdfoot Trefoil Categories: A-B Broadleaf Weeds Last review date: 2026-07-07 10:19 Scientific name: Lotus corniculatus Family: Fabaceae Cycle: Perennial Plant type: Broadleaf Other Common Names: Common bird’s-foot trefoil, Eggs and bacon, Birdsfoot deervetch Birdfoot Trefoil flowers Photo by: Albert Herring CC 2.0 Biology Lotus corniculatus can be identified by its unique shaped leaves that […]
Weeds: Bittercress Categories: A-B Broadleaf Weeds Last review date: 2026-07-07 10:30 Scientific name: Cardamine hirsuta Family: Brassicaceae (Cruciferae) Cycle: Winter annual Plant type: Broadleaf Other Common Names: Flick Weed, Hairy Bittercress, Hoary Bittercress, Lamb’s Cress, Land Cress, Shot Weed, Springcress Hairy bittercress rosette (1) Photo by: T.W. Miller Biology Little bittercress is a fall/winter-germinating annual […]
Weeds: Bittersweet nightshade Categories: A-B Broadleaf Weeds Last review date: 2026-07-07 10:36 Scientific name: Solanum dulcamara Family: Solanaceae Cycle: Perennial Plant type: Broadleaf Other Common Names: Blue Blindweed, Blue Nightshade, Climbing Nightshade, Devil’s Apple, European Bittersweet, Fellonwort Bittersweet nightshade fruits Photo by: T.W. Miller Biology Bittersweet nightshade is a trailing to climbing, viny plant with […]
Weeds: Black Locust Categories: A-B Broadleaf Invasive Pests Invasive Plants Weeds Last review date: 2026-08-10 10:42 Scientific name: Robinia pseudoacacia Family: Fabaceae (Leguminosae) Cycle: Perennial Plant type: Broadleaf Other Common Names: False Acacia, Green Locust, Pea Flower Locust, White Locust, Yellow Locust Black locust flowers Photo by: Richard Webb, Bugwood.org Biology Black Locust is a […]
Weeds: Black medic Categories: A-B Broadleaf Weeds Last review date: 2026-07-07 10:44 Scientific name: Medicago lupulina Family: Fabaceae (Leguminosae) Cycle: Annual Plant type: Broadleaf Other Common Names: Black Clover, Black Nonesuch, Hop Clover, Trefoil, Yellow Trefoil Black medic stem and leaves Photo by: T.W. Miller Biology Black medic is very clover-like in appearance and is […]
Weeds: Blackberry Categories: A-B Broadleaf Weeds Last review date: 2026-07-07 10:49 Scientific name: Rubus spp. Family: Rosaceae Cycle: Perennial Plant type: Broadleaf Other Common Names: Himalayan blackberry, Evergreen blackberry, Pacific blackberry 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), […]
Weeds: Blue mustard Categories: A-B Broadleaf Weeds Last review date: 2026-07-07 10:53 Scientific name: Chorispora tenella Family: Brassicaceae (Cruciferae) Cycle: Winter annual Plant type: Broadleaf Other Common Names: Purple mustard, Tenella mustard Blue mustard with flowers Photo by: J.A. Kropf Biology Blue mustard is a leafy, taprooted winter annual. Plants branch primarily from the base, […]
Weeds: Brackenfern, western Categories: A-B Other Weeds Last review date: 2026-07-07 11:03 Scientific name: Family: Dennstaedtiaceae (Polypodiaceae) Cycle: Perennial Plant type: Other Other Common Names: Bracken, Decomposition brackenfern, Hairy brackenfern Western brackenfern fronds Photo by: R. Parker Biology Brackenfern grows from creeping rhizomes, which can spread the plant over a large area. The hairy rhizomes […]
Weeds: Buffalobur Categories: A-B Broadleaf Weeds Last review date: 2026-07-07 11:10 Scientific name: Solanum rostratum Family: Solanaceae Cycle: Annual Plant type: Broadleaf Other Common Names: Buffalo-bur, Spiny nightshade, Colorado bur Buffalobur with flowers Photo by: D.G. Swan Biology Buffalobur is an exceptionally spiny annual plant growing about two feet high. The alternate leaves have deep, […]
Weeds: Bull thistle Categories: A-B Broadleaf Weeds Last review date: 2026-07-07 11:14 Scientific name: Cirsium vulgare Family: Asteraceae (Compositae) Cycle: Biennial Plant type: Broadleaf Other Common Names: Common Thistle, Dodder, Boar Thistle Bull thistle flower Photo by: J.A. Kropf Biology A first-year plant of bull thistle is a rosette of deeply lobed, wavy-margined leaves. The […]
Weeds: Buttercup, creeping Categories: A-B Broadleaf Weeds Last review date: 2026-07-07 11:18 Scientific name: Ranunculus repens Family: Ranunculaceae Cycle: Perennial Plant type: Broadleaf Other Common Names: Prairie Double-flowered Buttercup, Water Buttercup Creeping buttercup flowers Photo by: T.W. Miller Biology Creeping buttercup is a creeping perennial plant that is usually fairly low growing. The stems are […]
Weeds: Butterfly bush Categories: A-B Broadleaf Weeds Last review date: 2026-07-07 11:25 Scientific name: Buddleja davidii Family: Scrophulariaceae Cycle: Perennial Plant type: Broadleaf Other Common Names: Summer Lilac Buddleja davidii ‘Fascination’ Photo by: Ptelea; CC BY-SA 3.0 Biology Butterfly bush, Buddleja davidii, is a deciduous shrub that grows from 3 to 15 ft tall. Until […]
Weeds: Canada thistle Categories: Broadleaf C-E Weeds Last review date: 2026-07-08 07:27 Scientific name: Cirsium arvense Family: Asteraceae (Compositae) Cycle: Perennial Plant type: Broadleaf Other Common Names: Creeping Thistle, Field Thistle, Swamp Thistle, Thistle Canada thistle leaves and flower Photo by: T.W. Miller Biology Canada thistle is an aggressive, spreading weed. The aboveground portions of […]
Weeds: Catchweed bedstraw Categories: Broadleaf C-E Weeds Last review date: 2026-07-08 07:48 Scientific name: Galium aparine Family: Rubiaceae Cycle: Annual Plant type: Broadleaf Other Common Names: Cleavers, Goosegrass, Stickyweed, Sticky willy, Velcro plant Catchweed bedstraw leaf whorls Photo by: T.W. Miller Biology Catchweed bedstraw is a weakly erect to sprawling plant from a slender taproot. […]
Weeds: Catsear, common Categories: Broadleaf C-E Weeds Last review date: 2026-07-08 07:48 Scientific name: Hypochaeris radicata Family: Asteraceae (Compositae) Cycle: Perennial Plant type: Broadleaf Other Common Names: California Dandelion, False Dandelion, Flatweed, Frogbit, Gosmore, Hairy Cat’s Ear, Rough Cat’s Ear, Spotted Catsear Common catsear rosette Photo by: J.A. Kropf Biology Common catsear, also known as […]
Weeds: Chickweed, common Categories: Broadleaf C-E Weeds Last review date: 2026-07-08 09:33 Scientific name: Stellaria media and Cerastium holosteoides Family: Caryophyllaceae Cycle: Annual, Perennial Plant type: Broadleaf Other Common Names: Birdweed, Chickenwort, Chickweed, Starweed, Starwort, Winterweed, Mouseear Common chickweed leaves and flowers Photo by: R. Parker Biology COMMON CHICKWEED reproduces both by seeds and by […]
