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Datura stramonium, known by the common names thornapple, jimsonweed (jimson weed), or devil's trumpet, [2] is a poisonous flowering plant in the Daturae tribe of the nightshade family Solanaceae. [3] Its likely origin was in Central America , [ 2 ] [ 4 ] and it has been introduced in many world regions.
Weeds growing in the cracks of a concrete staircase (Epilobium roseum, Chelidonium majus, Oxalis corniculata, Plantago major)A weed is a plant considered undesirable in a particular situation, growing where it conflicts with human preferences, needs, or goals.
It is capable of spreading and thereby becoming an invasive weed. All parts of the plant are toxic , especially the seeds and roots, and especially when ingested. Under the right conditions the plant grows quite rapidly during the growing season and can reach heights of 2.4 metres (8 feet), with a long penetrating root .
Euphorbia peplus (petty spurge, [1] [2] radium weed, [2] cancer weed, [2] or milkweed), [2] is a species of Euphorbia, native to most of Europe, northern Africa and western Asia, where it typically grows in cultivated arable land, gardens and other disturbed land.
[2] [3] [4] It is considered to be one of the ten worst weeds in the world. [5] In the United States, Johnson grass is listed as either a noxious or quarantined weed in 19 states. [ 6 ] With Sorghum bicolor it is a parent of Sorghum × almum , a forage crop also considered a weed in places.
Tall waterhemp is a summer annual that produces a large number [quantify] of very small [quantify] seeds. It is considered an r-strategist. Emergence can span several months and often occurs later in the season than other annual weeds, allowing the weed to evade typical weed control strategies such as herbicide application and tillage. [8]
Asclepias tuberosa, commonly known as butterfly weed, is a species of milkweed native to eastern and southwestern North America. [2] It is commonly known as butterfly weed because of the butterflies that are attracted to the plant by its color and its copious production of nectar .
Bromus tectorum, known as downy brome, drooping brome [1] or cheatgrass, is a winter annual grass native to Europe, southwestern Asia, and northern Africa, but has become invasive in many other areas.
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