WW-01351 Reviewed 1997
Gerald R. Miller and Oliver E. Strand
Copyright © 2000 Regents of the University of Minnesota. All rights reserved.
|Crabgrass, large||Bindweed, field|
|Oat, wild||Bindweed, hedge|
|Foxtail, giant||Nutsedge, yellow|
|Foxtail, yellow||Sowthistle, perennial|
|Panicum, fall||Thistle, Canada|
|Proso millet, wild|
Leaf sheath open, flattened; leaf blade smooth and hairless; no ligule.
Leaf sheath round, hairy, open; leaf blade wide, hairy; ligule membranous.
Leaf sheath pubescent, round, open; leaf blade smooth and hairless except often has scattered hairs on leaf margin toward base of leaf; ligule prominent, membranous.
Leaf sheath round, pubescent, open; leaf blade with dense covering of fine hairs on upper surface, few scattered hairs on lower surface; ligule a fringe of hairs.
Leaf sheath round, pubescent, open; leaf blade relatively free of hairls on both surfaces: ligule a fringe of hairs.
Leaf sheath flattened, open, relatively hairless; leaf blade has scattered long whitish hairs toward base, otherwise hairless; ligule a fringe of hairs.
Leaf sheath round, open, smooth and free of hairs; leaf blade hairless; ligule a fringe of hairs.
Leaf sheath round, open, prominently veined, coarse hairy; leaf blade wide, hairy; ligule a fringe of hairs.
Cotyledons ovate to spatulate rough; leaves opposite, hairy, prominent midvein, petiole short; stem white-hairy; plant erect.
Cotyledons broad, shallow notch at tip; leaves somewhat heart-shaped to arrowhead-shaped, alternate; plant vine-like, twining or trailing.
Cotyledons broad, notched at tip; leaves arrowhead-shaped with "cut-a-way corners" at base, leaves larger than field birdweed leaves, alternate; plant vine-like, twining.
Leaves three-ranked with triangular stem, numerous fine veins visible on leaf sheath; no ligule as in grasses.
Leaf sheath round, open, pubescent; leaf blades may be smooth or pubescent; ligule membranous, short; older leaves bear a pair of auricles (short claw-like appendages that are attached to the leaf collar at base of blade); plants may arise from seed or from white rhizomes (underground stems).
Cotyledons oval, short stalked; leaves ovate with slightly toothed or prickly margins, long petioles, leaves alternate; plant erect, plant contains milky juice.
Cotyledons ovate to linear, thick and fleshy; first leaves ovate with prickly margins, successive leaves more wrinkled and spiny, leaves alternate; plant erect.
Gerald R. Miller
Oliver E. Strand
former extension agronomist
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