Burke: Brassica rapa vs. Brassica juncea

	Brassica rapa	Brassica juncea
	common mustard, field mustard, wild turnip	Chinese, Indian, brown mustard, leaf mustard
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 rapa	Brassica juncea
Flowering time	April-Septemeber	May-July
Habitat	Roadsides, fields, ditches, wastelots and other disturbed open areas.	Disturbed areas including fields, roadsides and wastelots.
Distribution	Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]	Occurring in scattered locations on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]
Origin	Introduced from Europe	Introduced from Eurasia
Conservation status	Not of concern	Not of concern
Sibling taxa	B. juncea, B. napus, B. nigra, B. oleracea	B. napus, B. nigra, B. oleracea, B. rapa
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	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

Brassica rapa

Brassica juncea

common mustard, field mustard, wild turnip

Chinese, Indian, brown mustard, leaf mustard

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 rapa

Brassica juncea

Flowering time

April-Septemeber

May-July

Habitat

Roadsides, fields, ditches, wastelots and other disturbed open areas.

Disturbed areas including fields, roadsides and wastelots.

Distribution

Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast.

[WildflowerSearch map]

[BONAP county map]

Occurring in scattered locations on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.

[WildflowerSearch map]

[BONAP county map]

Origin

Introduced from Europe

Introduced from Eurasia

Conservation status

Not of concern

Sibling taxa

B. juncea, B. napus, B. nigra, B. oleracea

B. napus, B. nigra, B. oleracea, B. rapa

Web links