ROBBERY AND MURDER. 



251 



respect, and there are eight species of them, parasiti- 

 cally growing on the roots of Broom, Gorse, Knap- 

 weed, Clover, Goose-grass, Wild Thyme, Yarrow, 

 Hemp, etc. The roots of other 

 plants are subject to the pre- 

 datory assaults of similar foes, 

 such as the Toothwort {La- 

 thrcea sqicainaria), to be met 

 with in April on the roots of 

 Alders by stream sides, as well 

 as on those of the Hazel in 

 damp spring woods. The 

 nearly - allied order, ScropJiu- 

 lariacece^ contains parasites in 

 what might be almost called 

 " every stage of parasitic de- 

 generation," such as those 

 which only occasionally resort 

 to it ; others which adopt the 

 habit whenever they can ; and 

 a few which cannot live unless 

 they are allowed to prey upon 

 some other plant. Among the 

 latter is the Hai'veya of the fig 

 Cape, which is wholly parasitic 

 upon the roots of the Heaths, and looks to all the 

 world like a genuine Broom -rape, but the struc- 

 ture of its seed-vessel proves it to belong to the 

 ScrophiilariacecB. 



. — Toothwort {Lathrcca 

 sqnamarici). 



