Raphanus raphanistrum |
Brassicaceae tribe Brassiceae |
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jointed charlock, jointed charlock or radish or wild-radish, wild-radish |
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Habit | Annuals, roots not fleshy; sparsely to densely pubescent. | Annuals, biennials, or perennials [shrubs]; eglandular. |
Stems | usually simple from base, (2–)3–8 dm, (retrorsely hispid). |
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Basal leaves | petiole 1–6 cm; blade oblong, obovate, or oblanceolate in outline, lyrate or pinnatifid, sometimes undivided, 3–15(–22) cm × 10–50 mm, margins dentate, apex obtuse or acute; lobes 1–4 each side, oblong or ovate, to 4 cm × 20 mm (smaller than terminal). |
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Cauline leaves | (distal) subsessile; blade often undivided. |
petiolate or sessile; blade base auriculate or not, margins entire, dentate, serrate, or pinnately lobed. |
Racemes | usually ebracteate, often elongated in fruit. |
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Flowers | sepals 7–11 × 1–2 mm, sparsely pubescent; petals yellow or creamy white (veins dark brown or purple), 15–25 × 4–7 mm, claw to 15 mm; filaments (slender), 7–12 mm; anthers 2–2.5 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 | divaricate or ascending, 7–25 mm, (straight). |
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Fruits | cylindrical or narrowly lanceolate; valvular segment 1–1.5 mm; terminal segment (1.5–)2–11(–14) cm × (2.5–)3–8(–11) mm, (base rounded), strongly constricted between seeds (usually breaking), strongly ribbed, beak narrowly conical; style 10–50 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 | (reddish brown or dark brown to black), oblong or ovoid, 2.5–3.5 × 1.8–2.5 mm. |
biseriate, uniseriate, or aseriate; cotyledons usually conduplicate, rarely accumbent or incumbent (in Cakile). |
Trichomes | absent or simple. |
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2n | = 18. |
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Raphanus raphanistrum |
Brassicaceae tribe Brassiceae |
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Phenology | Flowering May–Jul. | |
Habitat | Disturbed waste places, cultivated fields, roadsides, orchards, hill slopes | |
Elevation | 0-800 m (0-2600 ft) | |
Distribution |
AK; AL; AR; AZ; CA; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NL; NS; ON; PE; QC; SK; SPM; Greenland; Europe; Asia [Introduced in North America; introduced also in Mexico, Central America, South America, Africa, Atlantic Islands, Australia]
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North America; Eurasia; n Africa [Introduced widely] |
Discussion | North American representatives of Raphanus raphanistrum are referable to subsp. raphanistrum. Four other subspecies are restricted to Europe. (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. 439. | FNA vol. 7, p. 419. |
Parent taxa | Brassicaceae > tribe Brassiceae > Raphanus | Brassicaceae |
Sibling taxa | ||
Subordinate taxa | ||
Name authority | Linnaeus: Sp. Pl. 1: 669. (1753) | de Candolle: Mém. Mus. Hist. Nat. 7: 242. (1821) |
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