i62 ALIEN FLORA OF BRITAIN 



Chenopodium album, L. Very widely distributed in 

 Britain and in the rest of the North Temperate 

 Zone as a weed of cultivated and waste places. It 

 has not been recorded, so far as the writer can trace,, 

 in any country in natural habitats. 



Chenopodium ambrosioides, L. According to De 

 Candolle, a native of Mexico. Introduced into South- 

 West Europe in the seventeenth century, and now 

 thoroughly naturalised there in sandy fields. It is also 

 very widely spread in other regions. It has been noticed 

 in a few waste ground localities in England. 



Chenopodium aristatum, L. Native of Northern Asia 

 and a weed of many other parts of the world in sandy 

 ground. Recorded by Mr. Davey near Penzance, iru 

 Cornwall. 



Chenopodium Bonus Henricus, L. Possibly native 

 in the high mountains of Southern Europe. In Northern 

 Europe, including England, it is always associated with 

 human dwellings, and is doubtless in many cases a 

 relic of cultivation. 



Chenopodium Botrys, L. A native of seashores and 

 river banks in Central and Southern Europe, Northern 

 Africa, and other regions. It has long been cultivated in 

 England, and is on record as a rare casual in waste places. 



Chenopodium ficifolium, Sm. A weed of roadsides 

 and waste places, about villages, and in cultivated ground 

 over a wide range, including England. It is now 

 frequent in the south-eastern counties, and appears to 

 be spreading rapidly. 



