I20 ALIEN FLORA OF BRITAIN 



some of our larger towns. It is, for instance, thoroughly 

 naturalised in the turf of Kew Green, South-West 

 London. 



[Matricaria inodora, L. The variety salina, Bab., 

 is apparently native on the seashores and cliffs of 

 Southern England, so that the type which is so common 

 on waste ground and arable land may perhaps be looked 

 upon as an artificial extension of a native seaside plant. 

 This supposition gains support from Mr. Reid's discovery 

 of fragments of this species in interglacial deposits in 

 England.] 



Mulgedium tataricmn, DC. Native of seashores in 

 Eastern Europe and Western Asia. Recorded as a casual 

 in England. 



Onopordon Acanthimn, L. A weed of waste ground 

 throughout the whole of Europe and Western Asia, 

 especially along roadsides. No distinctly natural 

 localities are given for the species in any of the local 

 Floras, British or foreign, which have been consulted, 

 but there can be little doubt that it is indigenous on the 

 dry sandy hills of Southern France, where it may be seen 

 growing quite independently of human interference. 



Parthenium Hysterophorus, L. An abundant weed 

 of hot and dry waste places in tropical America, especially 

 in towns. It has several times been recorded as a weed 

 of waste ground in England, and usually in connection 

 with introduced ^rain. 



fc>' 



Petasites albus, Gaertn. Native of wet mountain 

 pastures from Central Europe to the Altai region. 

 Recorded in many places as an escape from gardens. 



