154 



BRASSICACEAE. 



at right angles with the septum, their valves 

 Seeds numerous, marginless ; cotyledons 

 accumbent. [Middle Latin, purse, from 

 the shape of the pod.] About 4 species, 

 natives of the northern hemisphere, the 

 following typical. 



1. Bursa Bursa-pastoris (L.) Brit- 

 ton. SHEPHERD'S PURSE. (Fig. 181.) 

 Branching, 6 '-2 high from a deep 

 root, pubescent below, mainly glabrous 

 above. Basal leaves lobed, pinnatifid, 

 or rarely entire, 2 '-6' long; stem-leaves 

 few, lanceolate, auricled; flowers about 

 1" long; pedicels 5"-8" long in fruit; 

 pods triangular, cuneate at the base, 

 truncate or emarginate, 2 "-4" long; 

 seeds 10 or 12 in each cell. [Thlaspi 

 Bursa-pastoris L. ; Capsella Bursa- 

 pastoris Medic.] 



Common in waste and cultivated 

 grounds. Naturalized from Europe. 

 Widely naturalized in America. Flowers 

 all the year round. 



2. Raphanus sativus 

 L. GARDEN RADISH. (Fig. 

 180.) Similar to the last, 

 but flowers pink or white. 

 Root deep, fusiform or 

 napiform, fleshy; pods 

 fleshy, 2-3-seeded, not lon- 

 gitudinally grooved, often 

 equalled or exceeded by the 

 long conic beak. 



Extensively cultivated, 

 and spontaneous in gardens or 

 fields, rarely in waste places. 

 Native of Asia. Flowers 

 nearly throughout the year. 

 Several kinds are grown as 

 garden crops. 



12. BURSA [Siegesb.] 



Weber. 



Annual or winter-an- 

 nual erect herbs, pubes- 

 cent with forked hairs, the 

 basal leaves tufted. Flow- 

 ers racemose, small, white. 

 Silicles cuneate, obcordate 

 or triangular, compressed 

 boat-shaped, keeled. Style short. 



