Northern Prairie Wildlife Research Center
Aquatic and Wetland Vascular Plants of the Northern Great Plains
22. Brassicaceae, the Mustard Family
1. Barbarea R. Br. -- Winter cress
1. Barbarea vulgaris R. Br.
Glabrous to sparsely hirsute, taprooted biennial or perennial 2-6 dm tall; simple
below, branched above, often purplish at the base. Basal leaves all or
mostly lyrate-pinnatifid and long-petioled, with a large, round to oblong terminal
lobe and (0)1-4 pairs of small lateral lobes, 3-15 cm long including the petiole,
1-3 cm wide; cauline leaves similar to the basal ones but short-petioled
to sessile and auriculate-clasping, reduced upward, the uppermost sinuate-lobed
or angular-toothed, not pinnatifid. Inflorescence of few to many, terminal
and lateral ebracteate racemes; pedicels 3-6 mm long. Flowers
rather showy; sepals yellowish-green, oblong, 2-3 mm long; petals
yellow, spatulate, 5-8 mm long. Siliques 2-valved, linear to curved-linear,
10-30 mm long, 0.5-1 mm thick, slightly 4-angled, the style persistent as a
beak 1.5-3.5 mm long; seeds in 1 row in each cell of the fruit. Late
May--Jun. Wet meadows, stream banks and alluvial bars; common in the Black Hills,
otherwise sporadic; (Intro. from Europe and naturalized throughout most of N.Amer.).
Reports of the more northern B. orthoceras Ledeb. for this region,
and the Black Hills in particular, are apparently based on misidentified specimens
of B. vulgaris.
Return to Family -- Brassicaceae -
The Mustard Family
Next Species -- Cardamine bulbosa (Schreb.) B.S.P.
-- Spring cress