Yellow Rocket, Winter Cress, Herb Barbara
Kingdom: Plantae, Division: Angiosperms, Class: Eudicots, Order: Brassicales, Family: Brassicaceae, Genus: Barbarea, Species: Barbarea vulgaris · Brassicaceae (Mustard or Cabbage family) · Simple but deeply lobed; deciduous/herbaceous biennial
Species
Barbarea vulgaris
Leaf Type
Simple but deeply lobed; deciduous/herbaceous biennial
Family
Brassicaceae (Mustard or Cabbage family)
Shape
Lyrately pinnatifid (large terminal lobe with smaller lateral lobes)
Size
Lower leaves 2-8 inches long; upper stem leaves shown are smaller, approximately 1-3 inches long
Margin
Crenate to wavy (sinuate) on the lobes; terminal lobe is significantly larger and rounded
Arrangement
Alternate on the stem; also forms a basal rosette in the first year
Rarity
Very Common
Color & Pattern
Dark green, glossy upper surface; no variegation; uniform green maturing to yellowish in senescence
Venation Pattern
Pinnate with a prominent midrib on the larger lobes; reticulate secondary veins
Texture & Surface
Smooth (glabrous) and slightly waxy or leathery; glossy appearance on the adaxial side
Description
An herbaceous biennial known for its bright yellow four-petaled flowers and glossy foliage. In its second year, it produces upright, branched stems. The flowers form dense clusters (racemes) at the tips. The fruit is a long, slender pod called a silique.
Key Features
Four-petaled yellow cruciform flowers; glossy dark green lyre-shaped leaves; stems are often ridged or angled
Habitat
Fields, roadsides, gardens, and disturbed areas; prefers moist, nitrogen-rich soils and full sun
Geographic Range
Native to Eurasia; widely naturalized and common throughout North America and temperate regions worldwide
Condition Notes
The specimen appears pressed and dried (herbarium style). The yellow flowers remain vibrant, and the leaf structure is intact. Overall health at time of collection: Good.
Interesting Facts
It was traditionally called 'Herb Barbara' because it could be harvested around St. Barbara's Day (Dec 4) due to its cold hardiness. It is one of the first wildflowers to bloom in spring.
Medicinal & Uses
Young leaves are edible and high in Vitamin C, often used in salads (bitter taste). Historically used as a wound herb (vulnerary). Modern use is primarily as a potherb or ornamental 'weed'.
Ecological Role
Provides early-season nectar for bees and flies; serves as a host plant for some Pieridae (white) butterflies.
Similar Species
Wild Mustard (Sinapis arvensis) which has hairier leaves; and Wild Radish (Raphanus raphanistrum) which has different seed pod structures.
Foraging Tips
Look for glossy, lyre-shaped leaves in early spring before other plants emerge. Harvest only young leaves before the plant flowers to avoid extreme bitterness.
Toxicity Warning
Non-toxic to humans in small amounts, but contains glucosinolates which can be kidney irritants if consumed in large quantities by livestock.