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Weeds and Plant Identification
Yellow rocket - Barbarea vulgaris

Rosette

Flower

Lower leaf

Seedling
 

 
Yellow rocket Barbarea vulgaris R. Br.
Brassicaceae (Mustard family)
 
Life cycle
Erect winter annual or biennial.
 
Leaves
Seedlings have round to egg-shaped cotyledons on long stalks with smooth, shiny, dark green leaves that initially develop from abasal rosette. Lower leaves are 2 to 8 inches long with a large, rounded terminal lobeand up to four oppositely arranged smaller lobes alongthe stalk. Upper leaves are alternate, more coarselytoothed than lobed, and theyoften distinctly clasp the stem, gradually becoming smaller toward the top.
 
Stems
Erect, hairless and up to 3 feet tall. Stems bolt from a basal rosette to flower and are numerous and branched at the top.
 
Flowers and fruit
Bright yellow flowers with four petals are found in terminal clusters. Fruit are slender, slightly curved, approximately 1-inch-long capsules with a slender beak at the tip; fruit are nearly square in cross-section.
 
Reproduction
Seeds.

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