Botany of Mustards 



97 



(Sinapis rugosa, Roxb. Fl. Ind. iii, 122. 1S32.) Bkoad-leaf 

 MusTAKD. Plant green, producing abundance of foliage, 

 annual: radical leaves large and quick-growing, more or less 

 hairy wlien young, usually blistered or bullate, 1 ft. or more 

 long and three-fourths as broad, obovate or oval, angled or 

 notched, separately cut or lobed below on the narrowing sides, 

 the petiole broad or stout ; lower stem leaves of similar shape, 

 large (blade 4 to 5 in. long and nearly as broad) notched 

 and angled, distinctly stalked; upper stem leaves oblong to 

 lanceolate, nearly or quite entire, usually sessile or tapering 

 to base, sometimes clasping : flowers about 14 in- long, bright 

 yellow, the clusters short in anthesis : pod 1 to 2 in. long, 

 exclusive of the rather slender acute beak. — Probably native 

 in China ; usually cultivated as " Chinese mustard." 



7. B. japonica, Sieb. acc. to Miq. Prol. Fl. Jap. 74. 1865-6. 

 (Sinapis japonica, Thunb. Fl. Jap. 262. 1784. B. nigra var. 

 japonica, Schulz, in Pflanzenr. iv, 105, p. 79. 1919.) Curled 

 Mustard. Very like B. i^ugosa, and perhaps a form of it, 

 distinguished by the frizzled and cut foliage. — An old garden 

 favorite. Now grown under several forms, as Giant Southern 

 Curled, Fordhook Fancy, Ostrich Plume, California Pepper- 

 grass, the last one with finely cut leaves. 



8. B. nigra, Koch, in Roehl. Deutschl. Fl. ed. 3, iv, 713. 

 1833. (Sinapis nigra, Linn. vSp. PI. 668.) Black Mustard. 

 Tall branching annual, 3 to 10 ft. high, with slightly glaucous 

 glabrous or sparsely hairy stem which is often reddish: leaves 

 oval to oblong, obtuse or short-acute, notched and variously 

 lobed, slender-petioled : flowers light yellow, about i/4 in. long, 

 terminating slender racemes : pod short ( % to 1 in. long over 

 all), 4-sided, stout, with a short conical beak, becoming closely 

 appressed to the rachis of the raceme : seeds small, brown or 

 brown-black, weighing about 1 mg. — Europe ; now widely spread 

 as a weed. Employed as a source of table mustard, manu- 

 factured from the seeds ; sometimes mentioned as grown for 

 the early radical leaves, for greens, but there are better kinds. 



9. B. alba, Rabenh. Fl. Lusit. i, 184. 1839. (Sinapis alba, 

 Linn. Sp. PI. 668.) White Mustard. Erect more or less hairy 



