GIBRALTAR PLANTS. 129 



Convolvulus arvensis, L. 



Hab. Europe. Asia Minor. North of Africa. 

 Convolvulus siculus, L. 



Hab. Britain, South of Europe. Sicily. North of 

 Africa. Canary Isles. 



OBS. Abundant on the glacis below Victoria-battery. Dr. Dum- 

 breck found it also on the rocks near the naval hospital. 



Convolvulus tricolor, Z>. 

 Hab. Spain, Portugal. North of Africa. 



OBS. Rare in Gibraltar ; abundant on the road to St. Roque. 

 The leaves and stem of the few specimens I gathered (near the 

 naval hospital) were pubescent. The Convolvulus batatas (sweet 

 potato) is cultivated in the vicinity of Gibraltar. The sweet 

 potato makes a delicious preserve, and is highly prized by the 

 Spaniards. Ornamental species of this tribe of plants are 

 rarely seen in gardens. 



BORAGINE^E, Desv. 

 Heliotropium europseum, L. 



Hab. Middle and South of Europe. Arabia. North of 

 Africa. Azores. 



OBS. Found on the road side, and on cultivated soils. Large 

 beds of it are found on the neutral-ground. 



Cerinthe major, L. 



C. aspera, Roth., var. purpurascens. Bracteae flo- 

 resque nigro-purpurascentes. 



Hab. Mediterranean region of Europe. North of Africa. 



Echium glomeratum, Poir. 

 E. pomponium. 



Boiss. tab. cxxiv. 



