CRUCIFEROUS TRIBE 



23 



Draba 

 Verna 

 (Vernal 

 Whitlow 

 Grass) 



4. D. muralis (Speedwell-leaved Whitlow Grass). 

 Stem leafy, branched ; leaves rough, egg-shaped, blunt, 

 toothed, embracing the stem ; pedicles spreading hori- 

 zontally ; stem 6-12 inches high ; flowers white. Lime- 

 stone mountains, rare. Fl. May. Annual. 



5. D. verna (Vernal Whitlow Grass). Flower-stalk 

 leafless ; petals deeply cleft ; leaves all radicle, forming 

 a rosette, somewhat toothed, hairy. Common on walls 

 and dry banks. Fl. February to May. Annual. 



This species is classed by some botanists as a distinct 

 genus Erophila ; the following forms occur : E. vul- 

 garis, pods twice as long as broad, common form ; 



E. brachycarpa, pods rounded, not 

 common ; E. inflata, pods inflated, 



U found on Ben Lewers, in Scotland. 

 % 



11. Cakile (Sea Rocket) 



1. C. maritima (Purple Sea Rocket). 

 The only British species. Common on 

 the sandy seashore, where it grows in 

 a bushy manner, with zigzag branched 

 stems ; bearing fleshy, variously cut, 

 glaucous leaves ; and corymbs of lilac 

 flowers. The seed-vessels are of very 

 curious construction, each containing 

 2 seeds, of which the lower is erect, 

 the upper pendant. Fl. June to Sep- 

 tember. Annual. 



Cakile Maritima 

 (Purple Sea Rocket) 



12. Crambe (Sea Kale) 



1. C. maritima (Sea Kale). Plant about 

 2 feet high ; glabrous, glaucous ; leaves 

 thick, waved a?i6 toothed ; root hard, 

 almost woody. This is the plant which 

 is so well known in gardens as an esculent 

 vegetable. The part which is eaten is 

 the leaf-stalk, blanched by being kept 

 from the action of the light. It is found 

 on various parts of the sea-coast, and 

 differs in no respect from garden speci- 

 mens, as they appear when the forcing is 

 over. Fl. June. Perennial. 



Crambe Maritima 

 (Sea Kale) 



