CRUCIFEROUS TRIBE. 



51 



Mountainous rocks. Kemarkable for the down on its 

 leaves, which is forked in a star-like manner ; Stems 

 from 4 to 6 inches high, bearing white flowers. Fl. 

 June, July. Biennial. 



4. D. murdlis (Speedwell-leaved Whitlow-grass). 

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



CAKfLri MARfxiMA (Purple Sea Rocket). 



toothed, embracing the stem ; pedicels spreading hori- 

 zontally. Limestone mountains, not common ; growing 

 from 6 to 12 inches high ', flowers white. FL May. 

 Annual. 



* Another species, D. rupestris (Kock Whitlow-grass), 

 grows on the summits of some of the Highland nioun- 



