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FNA | Family List | FNA Vol. 7 | Brassicaceae

29. Sinapis Linnaeus, Sp. Pl. 2: 668. 1753; Gen. Pl. ed. 5, 299. 1754.

Mustard [Greek sinapi, mustard] Mustard [Greek sinapi, mustard]

Suzanne I. Warwick

Annuals [perennials]; not scapose; glabrous or pubescent. Stems erect, unbranched or branched distally. Leaves basal and cauline; petiolate or sessile; basal usually not rosulate, petiolate, blade margins usually lyrate, pinnatifid, or 1- or 2-pinnatisect, rarely undivided, (lobes usually coarsely dentate); cauline shortly petiolate or subsessile [sessile], blade (base not auriculate), margins often dentate or shallowly lobed [entire], rarely subentire. Racemes (corymbose, several-flowered), considerably elongated in fruit. Fruiting pedicels ascending, divaricate, or suberect [erect, reflexed], stout [slender]. Flowers: sepals usually spreading, rarely reflexed, narrowly oblong [linear], lateral pair not saccate basally; petals (spreading), yellow, obovate, claw differentiated from blade, (claw subequaling sepal, apex obtuse or emarginate); stamens tetradynamous; filaments not dilated basally; anthers oblong, (apex obtuse); nectar glands (4), distinct, lateral pair usually prismatic, rarely lobed, median pair present, (ovoid). Fruits siliques, dehiscent, sessile, segments 2, linear or lanceolate [oblong], torulose, terete or slightly flattened [4-angled, latiseptate]; (valvular segment dehiscent, longer or shorter than terminal segment, 2-5(-12)-seeded; terminal segment indehiscent, seedless or 1- [2-]seeded, flattened and ensiform, or terete and conical or subulate, sometimes corky); valves each with 3-5(-7) prominent, longitudinal veins, (thin or thick), glabrous or pubescent; replum rounded; septum complete; ovules 4-20 per ovary; stigma capitate, 2-lobed. Seeds uniseriate, usually plump, rarely slightly flattened, not winged, globose; seed coat (finely reticulate [smooth or alveolate]), mucilaginous or not when wetted; cotyledons conduplicate. x = [7], 9, 12.

Species 5 (2 in the flora): introduced; Eurasia, n Africa; introduced also nearly worldwide.

SELECTED REFERENCE Baillargeon, G. 1986. Eine taxonomische Revision der Gattung Sinapis (Cruciferae: Brassiceae). Doctoral thesis. Freie Universit├Ąt Berlin.


1 Fruiting pedicels divaricate; fruits lanceolate, hispid, trichomes of 2 types; terminal segment flattened, equal to or longer than valves, seedless.   1 Sinapis alba
+ Fruiting pedicels ascending to suberect; fruits linear, glabrous or pubescent, trichomes of 1 type; terminal segment terete, much shorter than valves, seedless or 1-seeded.   2 Sinapis arvensis

Lower Taxa


 

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