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Genus Leucanthemum
- comprises plants often included in the genus Chrysanthemum
Genus Liatris
- genus of perennial North American herbs with aromatic usually cormous roots
Genus Ligularia
- genus of Old World herbs resembling groundsel: leopard plants
Genus Lonas
- 1 species: yellow ageratum
Genus Machaeranthera
- wildflowers of western North America
Genus Madia
- genus of sticky herbs with yellow flowers open in morning or evening but closed in bright light
Genus Matricaria
- chiefly Old World strong-smelling weedy herbs; comprises plants sometimes included in other genera: e.g. Tanacetum; Tripleurospermum