Fig. 5 m. 



a: V. tricolor from field, S. Lvngvitr, Holmsland Klit: erecta, n.atropvrp, g rand i fol. (Population Y, 

 table I). 



b: V. tricolor maritima from dune, S. Lyngvig, Holmsland Klit: prostrata, atropurp, parvifol, cae- 

 spitosa. The light parts were covered with sand. The turgor has bent the stems downwards with 

 vigour. 



c: A branch of b with flower. The light parts of it was covered with sand. The subterraneous parts 

 are negative geotropic, the supraterraneous are transversely geotropic. 



