![]() ![]() (60 to 120 cm) tall with axillary clusters of small pink to lilac flowers in the upper axils of leaves. Leonurus cardiaca L., motherwort, agripaume cardiaque Sometimes grown as a garden plant, but soon ![]() The east lawns, gardens, and waste places introduced fromĮurope and Asia. Irregular flowers, purple-blue throughout, but most common in Nodes flowering stems 3 to 10 inches ( 8 to 25 cm.) high Perennial, spreading mainly by creeping stems that root at the Glechoma hederacea L., ground-ivy, lierre terrestre Pastures, barnyards, and waste places introduced from Europe Galeopsis tetrahit L., hemp-nettle, ortie royaleĪnnual, spreading by seeds, 1 to 3 feet (3 to 9 dm.) high įlowers irregular, white to purple throughout gardens, The mid-west clover fields, gardens, native grassland,Ĭlearings, edges of woods, roadsides, and waste places native It can escape from cultivation and become a troublesome weed locally.ĭracocephalum parviflorum Nutt., American dragonhead, dracocéphale d’AmériqueĪnnual to biennial, spreading by seeds plants 1 to 3 feet (3 toĩ dm.) high flowers irregular, blue to purple most common in This introduced plant has been used as a ground cover, as an ornamental, and as a medicinal plant. Racemes have 6 to 12 blue or purple flowers. It has stems up to 6 inches (15 cm.) high. Read his biography "The Real Weed Man" available in print and ebook.Ĭlick here to go to Weed Photos for this familyĪjuga is a perennial herb, spreading mostly by its vigorous rhizomes. Research Scientist and Research Institute Director (retired) and presently Honorary Research Associate, Agriculture and Agri-Food Canada,Īwarded the George Lawson Medal by the Canadian Botanical Association in 2006.Īwarded the Faculty of Macdonald, McGill University, Most Distinguished Alumni Award on October 18, 2014.
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