112 CRUCIFERACEAE (MUSTARD FAMILY) 



D. Leaves i-2-pinnatifid, subglabrous; pod 0.6-1.5 cm. long. 

 E. Pod 10-14 nira. long, spreading. W. E. 



S. incisum (western tansy mustakd) 

 EE. Pod 3-6 mm. long, on ascending pedicels. W. E. S. incanum 



DD. Leaves 3-pinnate, canescent; pod about 2 cm. long. E. 



S. sophla (jlixweed) 



BRASSICA (Mustard) 



Annual or biennial, coarse, erect. Basal leaves pinnatifid or lyrate; 

 stem leaves dentate or nearly entire. Flowers large, in elongated racemes. 

 Sepals equal or one pair saccate at base. Pod linear, sessile, terete, or some- 

 what 4-sided, not stipitate. Seeds in i row, globose, not margined. — 

 (The Latin name of the Cabbage.) Cabbage, Cauliflower, Brussels Sprouts, 

 Kohl-rabi, and Kale are merely cultivated varieties of Brassica oleracea. 



A. Stem leaves auriculate and clasping at the base. W. E. — Cultivated for its 

 root. B. campestris (turnip) 



AA. Stem leaves not auriculate nor clasping. 

 B. Pod beak less than \ as long as the fertile part, terete; pod glabrous. W. E. 



B. nigra (black mustard) 

 BE. Pod beak 5-1^ times as long as the fertile portion, flat or 2-edged. 

 C. Pod beak somewhat 2-edged but not flat; pod glabrous. W. E. 



B. arvensis (wild mustard) 

 CC. Pod beak flat; pod hairy. W. — The ground seeds are table mustard. 



B. alba (white mustard) 



RAPHANUS (Radish) 



Annual or biennial, coarse. Leaves l3Tate. Flowers showy. Petals 

 large, clawed. Pod linear to lanceolate, distinctly beaked, transversely 

 divided by false partitions, fleshy or corky. Seed spherical or nearly so. 

 (Gk. ra = quickly, phaino = to appear; referring to the rapid germina- 

 tion.) 



A. Flowers white or yellow; dry pod grooved lengthwise; seeds 2-xo. E. 



R. raphanlstrum (wild radish) 



AA. Flowers white or pink or purple; dry pod not grooved lengthwise; seeds usually 



2-3. W. E. R. sativus (garden radish) 



BARBAREA (Winter Cress) 



Bieimial or perennial, glabrous, stems angled. Leaves entire or pinnati- 

 fid. Petals spatulate or clawed. Stamens free. Style short; stigma 

 2-lobed. Pod linear, somewhat 4-angled. — (Honor of St. Barbara, who 

 used them medicinally.) 



A. Pod ascending, 2.5-3 cm. long; flowers racemose even when opening. E. 



B. vulgaris 



AA. Pod appressed, 1-1.5 cm. long; flowers corymbosely aggregated when opening. 



W. B. stricts 



