. Bulletin. Agriculture -- Ontario. Fig. A. Tripod magnifier. Fig, B. Linen tester. Classification of Weeds. Weeds may be classi6ed according to the length of time they live, as follows: Annuals, or weeds which germinate, bloom, fruit, and die, in one year or season. Corn Cockle is an example. Winter Annuals, which germinate late in summer or autumn, pass the winter as seedlings or immature plants, and complete the cycle of their existence by blooming, fruiting, and dying during the following summer. Such are Chess and Shepherd's Purse. Biennials, which produce leaves and roots the first year,
. Bulletin. Agriculture -- Ontario. Fig. A. Tripod magnifier. Fig, B. Linen tester. Classification of Weeds. Weeds may be classi6ed according to the length of time they live, as follows: Annuals, or weeds which germinate, bloom, fruit, and die, in one year or season. Corn Cockle is an example. Winter Annuals, which germinate late in summer or autumn, pass the winter as seedlings or immature plants, and complete the cycle of their existence by blooming, fruiting, and dying during the following summer. Such are Chess and Shepherd's Purse. Biennials, which produce leaves and roots the first year, and flowers and seeds the second year, after which they die. The Wild Carrot and Evening Primrose are familiar examples. Perennials, which last from year to year, blooming and seeding annually. These are divided into two classes: (1) Those with underground creeping stems, such as the Canada Thistle. (2) Those with roots which do not spread underground, such as Chicory and Plantain. It is important to know the class to which a weed belongs, as the method of eradicating an annual is often very different from that required to destroy a Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ontario. Dept. of Agriculture; Ontario Agricultural College. Toronto : Ontario Dept. of Agriculture
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