SPECIES AND VARIETIES. 199 



(31) Cakile. SEA ROCKET. 



C. maritima : stems hard at the base, with loose, straggling, 

 glabrous branches, a foot long or more; leaves few, thick, 

 fleshy, with few distant oblong or linear lobes; flowers pur- 

 plish, not unlike those of a Stock ; pods on short thick pedi- 

 cels, distant, in long racemes, when young linear or lanceo- 

 late entire, when ripe separating transversely into two joints, 

 the upper one mitre-shaped, the lower one persistent, not un- 

 like the head of a pike, divided into two points, and contain- 

 ing a pendulous ovule, which seldom enlarges into a seed, 

 Sandy sea-coasts. Fl. June to September. 



(32) Crambe. SEA KALE. 



C. maritima : stems two feet high, branched ; leaves stalked, 

 large, thick, smooth, glaucous, roundish, waved, coarsely- 

 toothed, the upper ones few and smaller ; panicle large, much 

 branched, the flowers white ; pod 34 lines broad, the abortive 

 joint short, within the calyx. Sandy sea-coasts. Fl. June. 



(33) Senebiera. 



S. Coronopus : annual ; stems at first forming a close tuft, 

 afterwards spreading ; leaves once or twice pinnately divided, 

 the segments linear or wedge-shaped, entire or toothed ; ra- 

 cemes forming close sessile heads, lengthening as the fruit 

 ripens to 1-2 inches ; flowers inconspicuous ; pod small, 

 marked with deep wrinkles, which form a kind of crest round 

 the edge. A common weed. Fl. June to September. 



(34) Isatis. WOAD. 



I. tinctoria : stem 1^-3 feet high, branched in the upper 

 part, glabrous; leaves obovate or oblong, 2-4 inches long, 



