WITH GEOGRAPHICAL POSITION, ETC. 87 



German Ocean, running out more or less northwards and 

 westwards. The chalk plants are referred to this type, 

 but incidentally so on account of the chalk tracts lying in 

 the south-east of England almost entirely. Phyteuma, 

 Ophrys, Actinocarpus, are examples. 



3d. The English Type, consisting of species chiefly or 

 exclusively found in England, and decreasing in fre- 

 quency northwards. Such are Acer campestre, Tamus 

 communis, Iris fcetidissima, Orchis Morio. 



4th. The British Type comprehends species widely 

 spread over Britain, and not exclusively prevailing in any 

 particular part of it, as Bellis, Calluna, Corylus. 



5th. The Scottish Type is the opposite of the 3d, its 

 species being prevalent chiefly in Scotland or the north 

 of England, and becoming rare or disappearing south- 

 wards. Trollius, Andromeda, Primula farinosa, Gera- 

 nium sylvaticum are examples of it. 



6th. The Highland Type is composed of species either 

 limited to the Scottish Highlands, or extending thence 

 into the mountainous tracts of the north of England or 

 Wales, but usually much less plentifully in the latter than 

 in the Highlands. Examples occur in Salix herbacea, 

 Azalea, Arbutus, Lobelia, Subularia. 



7th. The Hebridean Type contains a few species pecu- 

 liar to the extreme north and west of Scotland, or at 

 least chiefly seen there, as Ericaulon septangulare, Ajuga 

 pyramidalis, Primula scotica. 



In the Tabular Appendix the different species will be 

 referred to their respective types ; but much liberty must 

 be allowed in such reference. Many species are so ex- 

 tremely local, or so intermediate between the types sug- 

 gested, that it becomes a doubtful question to which they 

 should be assigned ; while others give rise to the same 

 uncertainty by partaking of the characteristic distribution 

 of two or three. Thus, it appears doubtful whether Con- 



