148 SYNOPSIS OF 



Hab. East Indies. Introduced into the South of 

 Europe, &c. 



OBS. The castor-oil plant thrives well on the rock ; and in many 

 places it is found wild. 



Mercurialis ambigua, L. 



M. annua, Medical Officers* Report. 



Hab. Britain, South of France, Spain, Portugal, Cor- 

 sica, Greece. North of Africa. 



Euphorbia chamresyce, L. 

 Var. canescens, Rseper. 

 M. canescens, L. 



Hab. South of Europe. Asia Minor, Palestine. North 

 of Africa. 



OBS. This remarkable species of Euphorbia is found in small 

 patches over all the grassy part of the neutral-ground, and 

 cannot fail to attract the attention when it flowers, late in 

 summer. 



Euphorbia rupicola, Boiss. 



Boiss., tab. clxi. 



E. caulibus fruticosis ramosis parte superiori fo- 

 liosis, foliis lanceolatis integerrimis mucronatis 

 uninerviis subtus parce pilosis, umbellfe quin- 

 quefidge radiis bifidis, involucris ovatis, involu- 

 cellis suborbicularibus flores occultantibus, 

 glandulis integris, capsulae verrucis sparsis 

 hemisphaericis, seminibus laBvibus.- j 



Hab. Spain. 



OBS. Not rare in Gibraltar. 



