DICOTYLEDONOUS PLANTS 69 



S. pinnatiflda DC. This is found along the coast, growing near 

 flumes, drains, roads, etc. 



V. CAPSEL'LA, Shepherd's Purse 



Flowers small, white. Pods elliptical or ohcordate, 2-celled, 

 flattened contrarij to the partition. Erect branching herbs 

 with the leaves clustered at the base. 



C. Bursa-pasto'ris Medic. Shepherd's Purse. This is the com- 

 mon dooryard weed, with obcordate pods in loose raceme. 



** Pod elongated. Flowers generally conspicuous. 



VI. RAPH'ANUS, Radish 



Pod beaked, compressed between the seeds. Flowers large, 

 orange, white or rose-purple, veined. These are coarse, hairy, 

 erect, branching herbs with fleshy roots. Leaves cut into 

 several divisions, the upper one much the largest. 



R. sati'vus L. This is the common radish which grows wild 

 throughout the settled parts of California. The petals are purplish, 

 and the fruit is not strongly compressed between the seeds. 



Vn. BRAS'SICA, Mustard 



Pod slender, terete, 2-celled, with a flattened beak. Flowers 

 yellow. All probably introduced weeds. 



a. B. campes'tris L. White Mustard. Flowers in a loose 

 raceme. Leaves bluish green, smooth, clasping. Pods large, spread- 

 ing. This is very common and is in bloom earlier than the other 

 species. 



b. B. ni'gra Koch. Black Mustard. Flowers in close racemes 

 at the ends of long stems, fragrant. Petals twice as long as the 

 sepals. Pods rather small, erect as if clinging to the stem. Stems often 

 very tall. This is common throughout California. 



VIII. ERYS'IMUM, Wallflower 



Pods spreading or erect, 1-5 in. long, 2-^-sided, ivith thick 

 walls. Flowers fragrant, yellow or orange, at first in a 



