Brassica rapa |
Brassica juncea |
|
---|---|---|
field mustard, turnip |
Chinese mustard, Indian mustard |
|
Habit | Plants annual or biennial, glabrous or sparsely pubescent basally, rarely glaucous. | Plants annual, pubescent or rarely glabrous, glaucous or not. |
Stems | 3–12(19) dm. |
erect; (2)3–10(18) dm, branched above. |
Basal leaves | and lowermost cauline (5)10–40(60) × 3–10 (20) cm; margins entire, dentate, or pinnatisect, with terminal lobes larger than 1–6 lateral lobes on each side, petiolate. |
and lowermost cauline (4)6–30(80) × 1.5–15(28) cm; margins lyrate-pinnatifid to pinnatisect, incised, dentate, or entire; terminal lobes larger than 1–3 lateral lobes on each side; long-petiolate. |
Inflorescences | fruiting pedicels ascending to divaricate; (5)10–25(30) mm. |
fruiting pedicels straight, divaricate; (5)8–15(20) mm. |
Flowers | sepals oblong; (3)4–6.5(8) mm, ascending; petals obovate; (5)7–10(13) × (2.5)3–6(7) mm, bright yellow, rarely pale or whitish yellow; claws 3–7 mm; anthers oblong, 1.5–2 mm; filaments 4–6(7) mm; lateral curved at base; styles obsolete. |
sepals spreading, oblong; (3.5)4–6(7) mm; petals ovate to obovate; (6.5)8–11(13) × 5–7.5 mm, yellow; claws 3–6 mm; filaments 4–7 mm; lateral curved at base. |
Fruits | divaricate to ascending; terete; (2)3–8(11) cm × 2–4(5) mm, valvular segments (1.3)2–5(7.5) cm, 8–15-seeded per locule; valves with prominent midveins; terminal segments conical; (0.3)1–2.5(3.5) cm; seedless or rarely 1-seeded, sessile. |
divaricate to ascending, not appressed to rachis; terete or slightly flattened; (2)3–5(6) cm × 3–4(5) mm, valvular segments (1.5)2–4.5 cm, 6–15(20)-seeded per locule; valves with prominent midveins, slightly torulose; terminal segments conical; (4)5–10(15) mm; seedless, sessile. |
Seeds | 1–1.8 mm in diameter. |
1–1.7 mm in diameter. |
Upper cauline leaves | ovate to lanceolate, 2–8(12) × 0.8–3 cm, bases amplexicaul or auriculate, sessile. |
oblanceolate, oblong, lanceolate, or linear; to 10 cm, bases not auriculate, petiolate or subsessile. |
2n | =20. |
=36. |
Brassica rapa |
Brassica juncea |
|
Distribution | ||
Discussion | Abandoned fields, roadsides, disturbed areas, gardens. Flowering Apr–Oct. 0–1500 m. BW, Casc, Col, CR, Est, Lava, Sisk, WV. CA, ID, NV, WA; worldwide. Exotic. Brassica rapa includes many cultivars. These are recognized as varieties or subspecies, including turnip (ssp. rapa), Chinese mustard or bok choy (ssp. chinensis), and Chinese cabbage or petsai (ssp. pekinensis). |
Roadsides, disturbed areas, cultivated and abandoned fields. Flowering Apr–Sep. 0–300 m. BR, WV. CA, ID, NV, WA; worldwide. Exotic. Brassica juncea is an allotetraploid derived from B. nigra (2n=16) and B. rapa (2n=20). |
Source | Flora of Oregon, volume 2, page 459 Ihsan Al-Shehbaz |
Flora of Oregon, volume 2, page 458 Ihsan Al-Shehbaz |
Sibling taxa | ||
Synonyms | Brassica campestris | |
Web links |
|
|