Wild mustard – Sinapis arvensis
Print
EmailSinapis arvensis L.
Brassicaceae (Mustard family)
MI Status
Non-native
Life cycle
Erect winter or summer annual.
Leaves
Seedlings have smooth, kidney-shaped cotyledons and prominently veined, bristly hairy leaves that initially develop from a basal rosette. Lower leaves are irregularly lobed and toothed with petioles; upper leaves are alternate, stalkless to short-stalked with coarsely toothed margins and pointed tips, gradually becoming smaller toward the top.
Stems
Erect, up to 3-foot-tall stems bolt from a basal rosette to flower. Stems are bristly hairy at the base, often branched and nearly hairless at the top.
Flowers and fruit
Bright yellow flowers with four petals are found in terminal clusters. Fruit are 1- to 2-inch-long, cylinder-shaped capsules with a four-angled beak at the tip that contain round, black to purple seeds.
Reproduction
Seeds.
Other Documents in this Series
You Might Also Be Interested In
-
MSU named Top 10 agriculture and forestry college in new report
Published on March 23, 2021
-
Celebrating 100 years of Michigan State University Extension in Alcona County
Published on October 19, 2017
-
Michigan to host national conference on disability in agriculture
Published on January 15, 2026
-
Protecting Michigan’s environment and wildlife through the Conservation Reserve Enhancement Program
Published on September 1, 2021
Accessibility Questions:
For questions about accessibility and/or if you need additional accommodations for a specific document, please send an email to ANR Communications & Marketing at anrcommunications@anr.msu.edu.