Orchardgrass is a bunch-type perennial grass weed that forms light green clumps in lawns. Leaves have folded vernation and are wide (¼ to ½ inch), light green, and pointed at the tip. The sheaths of orchardgrass are strongly compressed and flattened. Other features of orchardgrass are the long, membranous ligule and the open-panicle seedheads. Nimblewill ( ) Muhlenbergia schreberi Nimblewill is a blue-green perennial grass that is common in Pennsylvania lawns during summer. It spreads over existing turf by stolons and forms dense patches. Leaf blades have a medium texture (about ¼ inch wide) and are short (1 ½ to 2 inches) with leaf tips tapering to an abrupt point. The stems are long, slender, and wiry with prominent nodes. Ligules are short, membranous, and jagged. The leaf blades have long hairs at the margins but do not possess auricles. Seedheads are long, slender, and inconspicuous. Nimblewill grows rapidly during the warm summer months and turns brown or tan in winter. Yellow nutsedge ( ) Cyperus esculentus Yellow nutsedge is not a true grass but a member of the sedge family. Plants in this family are characterized by erect, triangular stems and a preference for moist or wet areas. Leaves and stems are yellow-green and shiny. Although leaves and aboveground stems die in winter, new growth occurs in spring and summer from vigorous, scaly rhizomes and nutlets that grow underground. Chestnut-brown seedheads may be present on plants that are not mowed. Wild garlic ( ) Allium vineale This species is a perennial weed that has a strong garlic or onionlike odor when cut. It is one of the first weeds to emerge in early spring. Wild garlic produces long, slender, mostly hollow leaves that are dark green and covered by a waxy substance. Leaves emerge from underground bulblets that are covered by thin, papery scales. Flowers may
Orchardgrass is a bunch-type perennial grass weed that forms light green clumps in lawns. Leaves have folded vernation and are wide (¼ to ½ inch), light green, and pointed at the tip. The sheaths of orchardgrass are strongly compressed and flattened. Other features of orchardgrass are the long, membranous ligule and the open-panicle seedheads. Nimblewill ( Muhlenbergia schreberi ) Nimblewill is a blue-green perennial grass that is common in Pennsylvania lawns during summer. It spreads over existing turf by stolons and forms dense patches. Leaf blades have a medium texture (about ¼ inch wide) and are short (1 ½ to 2 inches) with leaf tips tapering to an abrupt point. The stems are long, slender, and wiry with prominent nodes. Ligules are short, membranous, and jagged. The leaf blades have long hairs at the margins but do not possess auricles. Seedheads are long, slender, and inconspicuous. Nimblewill grows rapidly during the warm summer months and turns brown or tan in winter. Yellow nutsedge ( Cyperus esculentus ) Yellow nutsedge is not a true grass but a member of the sedge family. Plants in this family are characterized by erect, triangular stems and a preference for moist or wet areas. Leaves and stems are yellow-green and shiny. Although leaves and aboveground stems die in winter, new growth occurs in spring and summer from vigorous, scaly rhizomes and nutlets that grow underground. Chestnut-brown seedheads may be present on plants that are not mowed. Wild garlic ( Allium vineale ) This species is a perennial weed that has a strong garlic or onionlike odor when cut. It is one of the first weeds to emerge in early spring. Wild garlic produces long, slender, mostly hollow leaves that are dark green and covered by a waxy substance. Leaves emerge from underground bulblets that are covered by thin, papery scales. Flowers may