Weeds and Their Control: Spotted Knapweed (Centaurea maculosa)
Karen Spotted knapweed is an aggressive short-lived perennial brought to North America from Eurasia in the 1890s in contaminated crop seed. Since then it has spread to almost every state in…
Weeds and Their Control: Oxeye Daisy (Chrysanthemum leucanthemum aka Leucanthemum vulgare)
Oxeye daisy is a rhizomatous perennial and belongs to the aster family, Asteraceae, that also includes sunflowers, yarrow, and lettuce. It is native to Europe and Asia but was introduced…
Weeds and Their Control: Oriental Bittersweet (Celastrus orbiculatus)
Oriental bittersweet is a deciduous woody, climbing or trailing vine belonging to the bittersweet family, Celastraceae, that also includes crucifixion thorn and euonymus. It is native to northern China, Japan…
Weeds and Their Control: Smooth Bedstraw (Galium mollugo)
Smooth bedstraw, also known as false baby’s breath, is a herbaceous perennial and member of the madder family, Rubiaceae, that also includes coffee, gardenia, and Pentas. It is native to…
Weeds and Their Control: Annual Sowthistle (Sonchus oleraceus)
Also known as common sowthistle, milk thistle, and several other names, annual sowthistle is a member of the aster family, Asteraceae, that also includes dandelions, yarrow, and lettuce. It is…
Weeds and Their Control: Hoary Vervain (Verbena stricta)
Hoary vervain is a herbaceous perennial and a member of the vervain family, Verbanaceae, that also includes lantanas, s verbenas, and sandpaper vines. It is native to the Midwest, the…
Weeds and Their Control: Moneywort (Lysimachia nummularia)
Also known as creeping Jenny and creeping loosestrife, moneywort is a vigorous, prostrate, evergreen perennial in the primrose family, Primulaceae, that also includes shooting star, cyclamen, and scarlet pimpernel. It…
Weeds and Their Control: Rough Cocklebur (Xanthium strumarium)
Also called clotbur, donkey bur, heartleaf, and woolgarie bur, this weedy annual is a member of the aster family, Asteraceae, that also includes sunflower, yarrow, and lettuce. It’s native range…
Weeds and Their Control: Spotted Spurge (Euphorbia maculata aka Chamaesyce maculata)
Also known as spotted sandmat, milk-purslane, and prostrate spurge, this summer annual weed is native to North America where it is found in all 48 contiguous states growing in gardens,…
Weeds and Their Control: Mouse-ear Chickweed (Cerastium vulgatum)
Mouse-ear chickweed is a mat-forming, cool-season perennial and a member of the pink family, Caryophyllaceae, that also includes carnations, baby’s breath, and soapwort. It is native to Eurasia but is…