what is this plant mentioned above that it can be mistaken as?
These are a genus of about 200 species of annual, biennial, and perennial herbs in the buckwheat family, Polygonaceae.
Rumex
The docks and sorrels, genus Rumex, are a genus of about 200 species of annual, biennial, and perennial herbs in the buckwheat family, Polygonaceae.
when did radishes become a food source for humans They were domesticated in Asia prior to Roman times. how are they consumed? They are mostly eaten raw as a crunchy salad vegetable with bite. are there other varieties? Yes, they differ based on the  seasons when they are grown and a variety of shapes, lengths, colors, and sizes, such as red, pink, white, gray-black, or yellow radishes, with round or elongated roots that can grow longer than a parsnip. what are parsnips? It is a root vegetable closely related to carrot and parsley; all belong to the family Apiaceae. what chemical compound give the first mentioned root vegetable its sharp taste? Glucosinolate, myrosinase, and isothiocyanate is the first mentioned compound found in any other plants? Yes, in mustard, cabbage, and horseradish. is the vegetable mentioned in the beginning and the third mentioned vegetable in the answer above are the same? No, but belongs to the same family of Brassicaceae where are they commonly cultivated and used? It is perennial in hardiness zones 2–9. how is the the third mentioned vegetable in your answer described? It is tall, hairless bright green unlobed leaves that may be mistaken for docks ("Rumex").
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Rumex [SEP] Introduction
The docks and sorrels, genus Rumex, are a genus of about 200 species of annual, biennial, and perennial herbs in the buckwheat family, Polygonaceae. Members of this genus are very common perennial herbs with a native almost worldwide distribution, and introduced species growing in the few places where the genus is not native. Some are nuisance weeds (and are sometimes called dockweed or dock weed), but some are grown for their edible leaves. "Rumex" species are used as food plants by the larvae of a number of Lepidoptera species, and are the only host plants of "Lycaena rubidus."