Noxious Weeds of Minnesota
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GLOSSARY |
alternate leaves: leaves attached singly along a stem.
annual: a plant that completes its life cycle in one year or less, and reproduces only by seed.
axil: point where a leaf or branch is attached to the stem.
biennial: a plant that completes its life cycle in 2 years, and reproduces only by seed.
bract: a modified leaf structure that surrounds the flower on some plants.
leaflet: a division of the leaf.
lobe: the leaf margin that is shallowly or deeply divided into sections or divisions.
opposite leaves: leaves attached in pairs along the stem.
pappus: a cluster of fine hairs attached to the seed in some plants, e.g., dandelion.
perennial: a plant that lives for more than 2 years, and reproduces by seeds, rhizomes, or other underground plant parts.
rhizome: an underground creeping stem which provides the means of production of some perennial plants.
rosette: a basal cluster of leaves. The first year's growth of biennial plants.
stolon: an above-ground prostrate stem which provides the means of reproduction of some perennial plants.
whorled leaves: three or more leaves attached at the same point along a stem.
winter annual: an annual plant that initiates growth in the fall and produces seed the following spring.
winged: any membranous extension or in some instance the extension of the leaf blade.
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Table of Contents
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ADDITIONAL REFERENCES |
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The following references on weed identification are available from the
University of Minnesota Extension Service
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Number
MI-1350
MI- 1349
MI-1351
MI- 1352
MI-2384
MI-2228
FO-0776
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Title
Annual Broadleaf Weed Identification
Annual Broadleaf Weed Seedling Identification
Annual Grass and Perennial Weed Seedling Identification
Annual Grass and Perennial Weed Identification
Weed Seedling Identification: Annual Broadleaves
Weed Seedling Identification: Grasses
Weed Seedling Identification
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Check prices and order from:
University of Minnesota Extension
Extension Store
Room 3 Coffey Hall
1420 Eckles Ave.
St. Paul, MN 55108
612-625-8173
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Beverly R. Durgan is an extension agronomist, University of Minnesota Extension Service
Copy Editor: Mary Kay O'Hearn
Graphic Design: Tracey J. Benson
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Table of Contents
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SECONDARY NOXIOUS WEEDS |
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In addition to the ten primary noxious weeds, the Minnesota Noxious Weed Law also defines and lists 49 secondary noxious weeds. A county may select a weed or weeds from this secondary list to be placed on its noxious weeds list. If a secondary noxious weed is placed on a county noxious weed list, that weed must be controlled in that county. The secondary noxious weeds are:
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Common Name
Alyssum, hoary
Artichoke, Jerusalem
Buckwheat, wild
Buffalobur
Burdock
Buttercup, tall
Brackenfern
Carrot, wild
Catchfly, nightflowering
Cockle, white
Cocklebur, common
Daisy, oxeye
Dock, curly
Flixweed
Foxtail, giant
Gumweed
Hawksbeard, narrowleaf
Hawksbeard, smooth
Hawkweed, orange
Jimsonweed
Knapweed, spotted
Kochia
Lambsquarters, common
Mallow, venice
Marshelder
Milkweed, common
Muhly, wirestem
Mustard, wild
Nightshade, eastern black
Nutsedge, yellow (nutgrass)
Oat, wild
Panicum, fall
Panicum, wild proso millet
Pigweed, redroot
Pigweed, prostrate
Quackgrass
Radish, wild
Ragweed, common
Ragweed, giant
Sandbur, field
Smartweed, Pennsylvania
Smartweed, (ladysthumb)
Sorghum-almum
Sunflower, common
Tansy
Velvetleaf
Yellow rocket
Woolly cupgrass
Wormwood, absinth
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Genus and species
Berteroa incana
Helianthus tuberosus
Polygonum convolvulus
Solanum rostraturn
Arctium minus
Ranunculus acris
Pteridium aquilinum
Daucus carota
Silene noctiflora
Lychnis alba
Xanthium pensylvanicurn
Chrysanthemum leucanthemum
Rumex crispus
Descurainia sophia
Seteria faberii
Grindelia squarossa
Crepis tectorum
Crepis capillaris
Hieracium aurantiacum
Datura stramonium
Centaurea maculosa
Kochia scoparia
Chenopodium album
Hibiscus trionum
Iva xanthifolia
Asclepias syriaca
Muhlenbergiafrondosa
Brassica kaber
Solanum nigrum
Cyperus esculentus
Avenafatua
Panicum dichotomiflorum
Panicum miliaceum
Amaranthus retroflexus
Amaranthus blitoides
Agropyron repens
Raphanus raphanistrum
Ambrosia artemisiifolia
Ambrosia trifida
Cenchrus pauciflorus
Polygonum pensylvanicurn
Polygonum persicaria
Sorghum almum
Helianthus annuus
Tanacetum vulgare
Abutilon theophrasti
Barbarea vulgaris
Eriochloa villosa
Artemisia absinthium
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Additional information on the laws governing, and on the enforcement of the noxious weed law can be obtained from:
Minnesota Department of Agriculture, Agronomy Division Section of Weed Control,
90 West Plate Boulevard, St. Paul, MN 55107 Phone: 612-296-6123
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Table of Contents
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