132 ALIEN FLORA OF BRITAIN 



Phacelia parviflora, Pursh. A native of shady places 

 in North America. Observed on the banks of the 

 Thames between Kew and Richmond. 



Phacelia tanacetifolia, Benth. A native of sandy and 

 gravelly banks of streams in North America. Much 

 grown in England for purposes of apiculture, and 

 occasionally found in quasi-wild situations. 



POLEMONIACE^. 



Collomia grandiflora, Dougl. A native of the plains 

 of North-West America. Cultivated in British gardens, 

 where it frequently becomes spontaneous, and even 

 escapes into waste ground in the neighbourhood. 



Collomia linearis, Nutt. Native of North-West 

 America, and observed by Mr. A. B. Jackson as a 

 garden weed in Leicestershire. 



Gilia achilleaefolia, Benth. A native of Western 

 North America, recorded by Davey as a casual in 

 Cornwall. 



Gilia capitata, Sims. A native of low ground in 

 California and a weed of cultivated ground throughout 

 North America. Several times recorded as a grain- 

 sifting introduction in England. 



Gilia intertexta, Steud. Native of dry hills in 

 California, and a weed of arable land in the United 

 States. Twice recorded as a grain introduction in 

 Britain. 



