Weeds and Exotics. Dandelion. What is a weed?. a plant in the wrong place a plant out of place a plant whose virtues are yet to be discovered one person’s weed is another person’s herbarium specimen . What is an exotic?.
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The ideal plant of the managed landscape in suburbia has the following characteristics: 1) It is often an introduced species that is poorly adapted to the surrounding environment. 2) It is a sterile hybrid or patented cultivar. 3) It is difficult to maintain and often short-lived.4) It doesn't spread readily to places where it doesn't belong. 5) It has obvious aesthetic or culinary properties.6) It has to be purchased at a store or through a catalog (maybe – heirloom plants may be passed from one gardener to another).
Purple Loosestrife Garlic Mustard
Smooth BromePhalaris arundinacea
Field Bindweed Kudzu
Autumn Olive Black Locust Tree of Heaven
Section 220.10 Duty of Every Person
a) It shall be the duty of every person to control the spread of and to eradicate all noxious weeds on lands owned or controlled by him in the State of Illinois.
b) All noxious weeds shall be controlled or eradicated by methods approved and adopted pursuant to the Act and these rules.
Section 220.60 Noxious Weeds
The following plants within the sovereign territory of the State of Illinois are designated and declared noxious weeds:
a) Marihuana (Cannabis sativa L.);
b) Giant Ragweed (Ambrosia trifida L.) within the corporate limits of cities, villages, and incorporated towns;
c) Common Ragweed (Ambrosia artemisiifolia L.) within the corporate limits of cities, villages, and incorporated towns;
d) Canada Thistle (Cirsium arvense);
e) Perennial Sowthistle (Sonchus arvensis);
f) Musk Thistle (Carduus nutans);
g) Perennial members of the sorghum genus, including johnsongrass (Sorghum halepense), sorghum almum, and other johnsongrass X sorghum crosses with rhizomes; and
h) Kudzu (Pueraria labata).
(Source: Amended at 26 Ill. Reg. 14644, effective September 23, 2002)
1) Some weedy species are pioneers of degraded landscapes where the soil is worn-out or nearly destroyed. Such weedy species are necessary to the healing process of the landscape, as their decaying organic matter improves the quality of the soil and the sets the stage for the succession of non-weedy plants – alfalfa, red clover
2) Some weedy species are pioneers of disturbed landscapes where the soil is high quality, but exposed to erosion by wind and water. Such weedy species quickly cover the exposed soil and prevent erosion from occurring until they are replaced by non-weedy plants – annual ryegrass
3) Weedy plants are often important sources of food and cover to various kinds of wildlife, including mammals, birds, and insects. For example, the caterpillars of Papilio polyxenes asterias (Black Swallowtail butterfly) feed on Daucus carota (Wild Carrot) and Pastinaca sativa (Wild Parsnip).
4) Weedy plants are potentially important sources of food, medicines, herbicides, and other products to modern society. For example, our major food crops are almost all weeds in terms of being exotic species for the Midwest and some of them such as apples can survive outside of cultivation. A powerful herbicide has been derived from Centaurea biebersteinii (Spotted Knapweed), while the fiber of Cannabis sativa (Marijuana) can be used to make paper, rope, or clothing.