Burke: Barbarea orthoceras

	Barbarea orthoceras
	American wintercress rocket, yellow rocket
Habit	Mostly glabrous biennial from a taproot and simple crown, the stems stiff, erect, angled, single but freely-branched, 2-6 dm. tall.
Leaves	Basal leaves long-petiolate, up to 12 cm. long, the blade usually lyrate-pinnatifid to pinnate, the lateral lobes 8-10, entire to round-toothed, the terminal lobe ovate, entire or irregularly toothed, the petiole often with long, marginal hairs; cauline leaves alternate, similar to the basal but reduced upward, becoming simple and sagittate.
Flowers	Inflorescence of compound or single and terminal racemes, with reduced racemes in the lower leaf axils; pedicles stout, 2-3 mm. long; sepals 4, pale yellowish-green, 2 mm. long; petals 4, yellow, spatulate-oblanceolate, 3-5 mm. long; stamens 6; style beak-like, 0.5-2 mm. long; stigma slightly lobed.
Fruits	Siliques 1.5-5 cm. long and 1.5-2.5 mm. broad, slightly compressed, 4-angled, strongly 1-nerved full length, erect or strongly ascending, nearly straight.

	Barbarea orthoceras
Flowering time	March-July
Habitat	Meadows, stream banks and moist woods, low to mid-elevations in the mountains.
Distribution	Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, northern Great Plains, Great Lakes region, and northeastern North America. [WildflowerSearch map] [BONAP county map]
Origin	Native
Conservation status	Not of concern
Sibling taxa	B. verna, B. vulgaris
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Barbarea orthoceras

American wintercress rocket, yellow rocket

Habit

Mostly glabrous biennial from a taproot and simple crown, the stems stiff, erect, angled, single but freely-branched, 2-6 dm. tall.

Leaves

Basal leaves long-petiolate, up to 12 cm. long, the blade usually lyrate-pinnatifid to pinnate, the lateral lobes 8-10, entire to round-toothed, the terminal lobe ovate, entire or irregularly toothed, the petiole often with long, marginal hairs;

cauline leaves alternate, similar to the basal but reduced upward, becoming simple and sagittate.

Flowers

Inflorescence of compound or single and terminal racemes, with reduced racemes in the lower leaf axils; pedicles stout, 2-3 mm. long;

sepals 4, pale yellowish-green, 2 mm. long;

petals 4, yellow, spatulate-oblanceolate, 3-5 mm. long;

stamens 6;

style beak-like, 0.5-2 mm. long;

stigma slightly lobed.

Fruits

Siliques 1.5-5 cm. long and 1.5-2.5 mm. broad, slightly compressed, 4-angled, strongly 1-nerved full length, erect or strongly ascending, nearly straight.

Barbarea orthoceras

Flowering time

March-July

Habitat

Meadows, stream banks and moist woods, low to mid-elevations in the mountains.

Distribution

Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, northern Great Plains, Great Lakes region, and northeastern North America.

[WildflowerSearch map]

[BONAP county map]

Origin

Native

Conservation status

Not of concern

Sibling taxa

B. verna, B. vulgaris

Web links