Brassica tournefortii |
Brassicaceae tribe Brassiceae |
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African mustard, Asian mustard, mustard, sahara mustard |
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Habit | Annuals; densely hirsute proximally, glabrescent distally. | Annuals, biennials, or perennials [shrubs]; eglandular. |
Stems | usually branched basally, (widely) branched distally, (1–)3–7(–10) dm. |
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Basal leaves | (rosettes persistent); petiole (broad) 2–10 cm; blade lyrate to pinnatisect, 2–30 cm × 10–50(–100) mm, (margins serrate-dentate), 4–10 lobes each side. |
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Cauline leaves | sessile; blade (reduced in size distally, distalmost bractlike), base tapered, not auriculate or amplexicaul. |
petiolate or sessile; blade base auriculate or not, margins entire, dentate, serrate, or pinnately lobed. |
Trichomes | absent or simple. |
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Racemes | not paniculately branched. |
usually ebracteate, often elongated in fruit. |
Flowers | sepals 5–4.5 × 1–1.5 mm; petals pale yellow, fading or, sometimes, white, oblanceolate, 4–7 × 1.5–2(–2.5) mm, claw 1–3 mm, apex rounded; filaments 2.5–4 mm; anthers 1–1.3 mm; gynophore to 1 mm. |
actinomorphic; sepals erect, ascending, or spreading, lateral pair saccate or not basally; petals white, cream, yellow, pink, lilac, lavender, or purple, claw present, often distinct; filaments unappendaged, not winged; pollen 3-colpate. |
Fruiting pedicels | widely spreading, 8–15 mm. |
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Fruits | (shortly stipitate); widely spreading to ascending (not appressed to rachis), torulose, cylindric, 3–7 cm × 2–4(–5) mm; valvular segment with 6–12(–15) seeds per locule, 2.2–5 cm, terminal segment 1(–3)-seeded, (cylindric, stout), 10–20 mm. |
silicles or siliques, dehiscent or indehiscent, usually segmented, usually latiseptate or terete (subterete or 4-angled in Erucastrum) [angustiseptate]; ovules (1–)2–276[–numerous] per ovary; style usually distinct (absent in Cakile, obscure in Carrichtera, obsolete in Eruca); stigma entire or strongly 2-lobed (sometimes slightly 2-lobed in Cakile). |
Seeds | light reddish brown or black, 1–1.2 mm diam.; seed coat prominently reticulate, mucilaginous when wetted. |
biseriate, uniseriate, or aseriate; cotyledons usually conduplicate, rarely accumbent or incumbent (in Cakile). |
2n | = 20. |
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Brassica tournefortii |
Brassicaceae tribe Brassiceae |
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Phenology | Flowering Feb–Apr. | |
Habitat | Roadsides, waste places, old fields, washes, open desert areas intermixed with desert shrubs | |
Elevation | 0-800 m (0-2600 ft) | |
Distribution |
AZ; CA; NV; TX; UT; Europe; Asia; Africa [Introduced in North America; introduced also in nw Mexico, Australia]
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North America; Eurasia; n Africa [Introduced widely] |
Discussion | Brassica tournefortii was first reported from California (Imperial, Riverside, and western San Bernardino counties) by W. L. Jepson ([1923–1925]), with the first collections appearing from southern California in 1941 (R. C. Rollins and I. A. Al-Shehbaz 1986), Arizona in 1959 (T. H. Kearney and R. H. Peebles 1960), Nevada in 1977, and Texas in 1978 (D. E. Lemke and R. D. Worthington 1991). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Genera 46, species ca. 245 (13 genera, 28 species in the flora). The generic boundaries in Brassiceae are largely artificial, and the number of genera may be substantially reduced. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 424. | FNA vol. 7, p. 419. |
Parent taxa | Brassicaceae > tribe Brassiceae > Brassica | Brassicaceae |
Sibling taxa | ||
Subordinate taxa | ||
Name authority | Gouan: Ill. Observ. Bot., 44, plate 20A. (1773) | de Candolle: Mém. Mus. Hist. Nat. 7: 242. (1821) |
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