170 Cruciferae 



2-lobed. Seeda in 1 row in each cell, globose. Cotyle- 

 dons conduplicate. 



* None of the leaves clasping the stem. 



1. B. nigra (L.) Koch. Erect 1-3 m. high, freely and widely 

 branching, pubescent orglabrate; lower leaves slender-petioled, 

 deeply pinnatifid, with 1 terminal large lobe ami 2-4 sm aller lat- 

 eral ones; segments all dentate; upper leaves Bhort-petioled or 

 sessile, pinnatifid or dentate or the uppermost entire; flowers 

 <»-10 mm. broad; pedicels slender, 4 mm. long in fruit ; pods nar- 

 rowly linear, 4-angled, smooth 10-15 mm. long, 1 mm. wide, ap- 

 pressed against the stem ; heak slender 2-4 mm. Ion.: ; seeds dark 

 brown. 



Common in poorly cultivated fields, especially in adobe soils. April-May. 



2. B. alba (L.) Boiss. Erect, branching above, 3-10 dm. high, 

 more or less pubescent with simple hairs ; leaves all pinnatifid or 

 the upper only dentate; pods spreading, pubescent, tipped with 

 a flattened beak of about equal length ; seeds pale yellow. 



Near the Soldiers' Home, Has&t . 



** Upper leaves clasping. 



3. B. campestris L. Stems 3-10 dm. high, glabrous and glau- 

 cous or rarely slightly pubescent below; lower leaves petioled, 

 pubescent, more or less lobed or pinnatifid, the upper glabrous, 

 lanceolate or oblong, acute or obtuseish, sessile and clasping at the 

 base, entire or dentate; pedicels spreading or ascending, often 2 

 cm. long in fruit; pods 3-5 cm. long; beak S-10 mm. long. 



Frequent in waysides and neglected gardens. January-April. In favored 

 places often flowering nearly throughout the year. 



9. RAPHANUS L. Radish. 



Erecl or widely branching from the base, animal or 

 biennial herbs, with lyrate leaves and showy Mowers. 

 Silique elongated linear, fleshy or corky, constricted or 

 continuous amd spongy between the seeds, indehiscent. 

 Seeds globose. Cotyledons conduplicate. 



1. R. sativus L, Biennial or annual from a more or less 

 elongated Meshy root; erect and freely branching, .3-5 dm. high, 



