Alyssum
''Alyssum'' is a genus of over a hundred species of flowering plants in the family Brassicaceae, native to Europe, Asia, and northern Africa, with the highest species diversity in the Mediterranean region. The genus comprises annual plant, annual and perennial plant, perennial herbaceous plants or (rarely) small shrubs, growing to 10–100 cm tall, with oblong-oval leaves. Alyssum flowers are characteristically small and grouped in terminal clusters; they are often yellow or white colored but can be pink or purple. The genera ''Lobularia (plant), Lobularia'', ''Aurinia'' and ''Odontarrhena'' are closely related to ''Alyssum'' and were formerly included in it. The widely cultivated species popularly known as "sweet alyssum" (''Alyssum maritimum'') is ''Lobularia maritima''. The common rockery plant (''Alyssum saxatile'') is ''Aurinia saxatilis''. ''Alyssum'' foliage is used as food by the caterpillars of certain Lepidoptera, including the Orthonama obstipata, Gem (''Orthon ...
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