Bermudagrass
(Cynodon dactylon): Grass family; perennial; first leaves with somewhat rough surface; ligule surrounded by ring of hairs with tuft of long hairs on either side; auricles absent; stem flat, wiry, and without hairs. |
Common knotweed
(Polygonum arenastrum): Seed leaves are long, very narrow, rounded at the tip and light green with a white cast. The true leaves are much broader, emerging from an encircling, membranous sheath at the leaf base. |
Field bindweed
(Convolvulus arvensis): Morningglory family; perennial, with most new shoots and seedlings emerging in spring; seed leaves nearly square, with shallow notch at tip; early true leaves spade shaped; petioles flattened. |
Johnsongrass
(Sorghum halepense): Grass family; perennial; persists and spreads via underground stems (rhizomes), which are thick, fleshy, and segmented; roots and shoots can rise from each rhizome segment; leaves have a prominent whitish midvein. |
Nutsedges
(Cyperus spp.): Sedge family; perennial; first leaves inconspicuous and grasslike; grow mainly from tubers or "nutlets" formed on rhizomes, mostly in upper foot of soil; in cross section, leaves V-shaped, arranged in sets of three at base, and stems triangular. |
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