WW-01349-GO
Reviewed 1997
North Central Regional Extension Publication 89
Annual Broadleaf Weed
Seedling Identification
Gerald R. Miller and Oliver E. Strand
Copyright © 1997 Regents of the University of Minnesota. All rights reserved.
Table of Contents
Descriptions of Annual Broadleaf Weed Seedlings
Buckwheat, wild
Cotyledons linear; leaves alternate, heart-shaped or triangular, leaves
bear ochrea at base of petiole; plant viny or twining.
Buckwheat, wild.
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Buffalobur
Cotyledons linear; leaves lobed, alternate, with yellow spines developing
on petiole, midrib and veins; plant erect.
Buffalobur.
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Cocklebur, common
Cotyledons linear; leaves alternate, toothed, prominently veined with three
main veins, ovate, rough surfaced; plant erect.
Cocklebur, common.
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Kochia
Cotyledons very small, oval; first leaves appear opposite, later alternate,
leaves densely hairy without petioles; plant erect.
Kochia.
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Lambsquarters, common
Cotyledons ovate, white mealy; leaves alternate, slightly toothed, white
mealy; plant erect.
Lambsquarters, common.
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Marshelder
Cotyledons oval; leaves toothed, long petiole, opposite, bristly hairy
on petioles and leaf blades; plant erect.
Marshelder.
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Mustard, wild
Cotyledons heart-shaped; leaves toothed, hairy, alternate; plant erect.
Mustard, wild.
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Nightshade, black
Cotyledons ovate; leaves alternate, ovate, dark green, veins prominent,
petioles purplish; plant erect or trailing.
Nightshade, black.
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Pigweed
Cotyledons linear; leaves alternate, ovate, indented at tip, midvein prominent,
petioles purplish; plant erect.
Pigweed.
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Ragweed, common
Cotyledons linear to somewhat oval, thick; leaves opposite at base of plant-alternate
above-deeply lobed, rough hairy; stem densely hairy; plant erect.
Ragweed, common.
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Ragweed, giant
Cotyledons ovate, large; leaves deeply three-lobed, opposite, rough surfaced;
plant erect.
Ragweed, giant.
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Smartweed, Pennsylvania
Cotyledons linear; leaves alternate, smooth, petiole bears ochrea without
fringe of hairs at top; plant erect or trailing.
Smartweed, Pennsylvania.
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Sunflower, wild
Cotyledons oval, rough; leaves opposite at base of plant-alternate above-rough
hairy, toothed; plant erect.
Sunflower, wild.
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Thistle, Russian
Cotyledons linear thread-like; leaves very narrow threadlike and cylindrical,
first leaves appear opposite, later become alternate, leaves later become
spine-tipped; plant erect.
Thistle, Russian.
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Velvetleaf
Cotyledons heart-shaped with blunt tips; leaves alternate, heart-shaped
with toothed margins, velvety soft hairy; plants erect.
Velvetleaf.
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Gerald R. Miller
extension agronomist |
Oliver E. Strand
former extension agronomist |
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Minnesota Extension.
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