Ontario Weeds: Black mustard
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Excerpt from Publication 505, Ontario Weeds, Order this publication
Table of Contents
Name: Black mustard, Brassica nigra (L.) Koch,Other Names: River mustard, moutarde noir, moutarde
Family: Mustard Family (Cruciferae)
General Description: Resembling Wild mustard when young but grows much taller (up to 2.5m, 8.5ft); leaves generally broader, longer and darker green; lower leaves have coarser lobed divisions, upper leaves narrow and nearly without teeth; flowers in very long thin racemes in a widely branched inflorescence as much as 1m (40in.) across; seedpods erect and pressed closely to the stem, only 10-20mm (2/5-4/5in.) long with a seedless beak about 3mm (1/8in.) long.
Photos and Pictures
Habitat: It occurs in a few localities
in southern Ontario, especially in fields and waste areas bordering
river valleys, and along railways.
Related Links
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... on weed identification, order OMAFRA
Publication 505: Ontario Weeds
... on weed control, order OMAFRA
Publication 75: Guide To Weed Contr
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