1858.] 



NATURALIZED PLANTS OF GREAT BRITAIN. 



453 



Silene italica grows in the south-east only of France. 



Myrrhis odorata is absent from Holland and the north-west 

 of France, but is indigenous to the mountains of eastern Ger- 

 many, and also occurs less abundantly in Scandinavia. 



Lonicera Xylosteum, a plant of more eastern longitude than 

 Britain. 



Cyclamen hederaefolium, an Italian species that scarcely reaches 

 Switzerland. 



In addition, Crocus vernus (a native of the mountains of central 

 Europe) and Lilium. Martagon were thought wild by Dr. Brom- 

 field (see ' Phytologist,' vol. iii. 952, 968). 



II. Two plants. Sisymbrium polyceratium and Alyssum mari- 

 timum, are natives of Portugal and the Azores, but are unknown 

 in Ireland and the west of France. Their introduction may 

 safely be referred to garden culture. 



III. The remaining 48 species are found in the countries 

 of Europe nearest to England, in some cases with the ap- 

 pearance of indigenous growth, but more usually showing traces of 

 an advance made during the last few centuries from the east and 

 south-east towards the west and north-western parts of Europe. 

 They are classed in the following manner. 



1. Such as are often cultivated in fields, parks, and gardens, 

 29 in number : — 



Anemone apennina. 

 Aconitum Napellus, L. C 

 Paeonia corallina. 

 Corydalis lutea. 

 Saponaria officinalis, B. 

 Acer Pseudo-platanus, Bromf. 

 Sempervivum tectorum. 

 Petroselinum sativum. 

 Coriandrum sativum. 

 Centranthus ruber. 

 Tragopogon porrifolius, L. C. 

 Silyhum Mariaimm, B., H. & A^ 

 Vinea major. 

 Linaria Cymbalaria. 

 Antirrhinum majus. 



CheirantJius Cheiri, H. & A. 



Isatis tinctoria. 



Cochlearia rusticana, B. 



Dianthus Caryophyllus. 



Eumex scutatus. 



Aristolochia Clematitis. 



Euphorbia Lathy ris, B. 



Mercurialis annua, B., H. & A., L. C. 



Pinus maritima. 



Narcissus poeticus. 



Narcissus bifiorus. 



Narcissus incomparabilis. 



Ornitliogalum nutans. 



Tulipa sylvestris, B., H. & A. 



Aconitum Napellus has its home in eastern Germany and the 

 Alps, the extreme lijnit of its range falling short of the French 

 side of the Channel. It is not probable that so conspicuous and 



