Ontario weeds. Descriptions, illustrations and keys to their identification.
Information is given for about 270 of the most widespread and important weeds in Ontario. Of these, 195 are illustrated with line drawings and a few others with colour photographs. The descriptions which accompany the drawings give the main distinguishing characteristics of the weed, the period of flowering, the distribution in Ontario and the usual places of occurrence. The book also contains a short guide to weed control and a brief account of the Noxious Weeds Act of 1974. Ontario weeds is written in everday language and is intended for use by all people who are involved with weeds.