Burke: Brassica oleracea vs. Brassica rapa

	Brassica oleracea	Brassica rapa
	cabbage, wild cabbage	common mustard, field mustard, wild turnip
Habit		Annual or biennial herb, glabrous or sparsely hairy with fleshy or slender roots.
Flowers		Flowers in small racemes terminally from leaf axils, with fruiting pedicels ascending to spreading, 10-25 mm. Sepals 4, green to yellow; petals 4, pale to deep yellow, 1 cm long; 6 stamens, 2 shorter than the others; superior ovary with one 2-carpellate pistil.
Fruits		Siliques up to 7cm long with s slender beaked tip.
Seeds		Black, brown or reddish in color, 1-2 mm in diameter. Seed coat is very finely reticulate to lightly alveolate.

	Brassica oleracea	Brassica rapa
Flowering time	May-August	April-Septemeber
Habitat	Disturbed areas including fields, roadsides, and wastelots, where escaped from cultivation.	Roadsides, fields, ditches, wastelots and other disturbed open areas.
Distribution	Occurring west of the Cascades crest in Washington; Washington to California, also in scattered locations across North America. [WildflowerSearch map] [BONAP county map]	Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]
Origin	Introduced from Europe	Introduced from Europe
Conservation status	Not of concern	Not of concern
Sibling taxa	B. juncea, B. napus, B. nigra, B. rapa	B. juncea, B. napus, B. nigra, B. oleracea
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	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