Erucastrum gallicum
bract-rocket, common dog-mustard, dog mustard, French rocket, hairy rocket, rocket-weed
erect or ascending, unbranched or branched (few to several), 0.9–6.5(–8) dm.
blade oblanceolate, 3–28 cm × 8–110 mm, margins dentate to deeply lobed or pinnatifid, lobes 3–10 each side, smaller than terminal, lobe margins crenate or dentate, surfaces sparsely pubescent.
similar to basal, distal shortly petiolate or sessile, blade smaller (distalmost 1–2 cm, passing into bracts, leaflike, linear, margins entire).
sepals 3–5 × 1–2 mm, sparsely hispid apically;
petals white to pale yellow, 4–8 × 1.5–3 mm;
filaments 3.5–5.5 mm.
(3–)5–10(–20) mm.
slightly torulose, 1–4.5 cm × 1–2(–2.7) mm;
terminal segment 1.5–4 mm;
style 1–3 mm.
reddish brown, 1.1–1.5 × 0.7–0.8 mm, alveolate.
= 30.
Erucastrum gallicum
A European native, Erucastrum gallicum was first recorded for North America from Massachusetts and Wisconsin (see J. O. Luken et al. 1993 for history of introduction and spread). It is naturalized in all the provinces of Canada and in parts of the United States, particularly the Midwest. It is an allopolyploid, with the n = 7 component from Diplotaxis erucoides/D. cossoniana and n = 8 from the E. nasturtiifolium complex (S. I. Warwick and L. D. Black 1993). I have not seen specimens from Maryland.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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