122 THE DISTRIBUTION OF LIVING PLANTS. 



glycyphylliis), a species more commonly found in the eastern 

 parts of England, and distributing itself over the greater part of 

 Europe, and into the far east of Russian Asia ; Common Sainfoin 

 {Onohrychis saliva), Salad Burnet {Poteritnn Sangiiisorba), Wild 

 Carrot {Danais Caroia), some species of Bedstraw, such as the 

 Slender Bedstraw {Galium sylvesire), and the Marsh Bedstraw 

 {Galium palusire), the Glabrous Oatgrass {Avena prafensis), and 

 the Field Fleawort {Seiiecio campesiris), which grows very luxuri- 

 antly on Ashmoor Down. 



In close local contact with the chalk comes the other member 

 of the cretaceous group, known as the Wealden Beds, which 

 causes the deep indentation of Swanage Bay, and extends thence 

 westwards to Lulworth. These beds are not without some 

 interesting plants, such as the Saw-wort, which may be found 

 in plenty near Corfe Castle. 



Passing now to the east and south-east of the county, we find 

 the district of Tertiary formation represented chiefly by the 

 Eocenes, and forming high heath-lands and long low stretches 

 of bogland — the latter area being the most productive of plant 

 life. Here the Bog-Asphodel {Narthecium ossifragum) channs 

 the solitudes with its slender stem of bright yellow flowerets, and 

 the air is scented with wild Thyme {Thymus Seipyllum) and Bog 

 INIyrtle {Myrica Gale). The Lesser Sundew {Drosera ifitermedia) 

 grows here in turfy bogs and shallow water, and the Common 

 Butterwort {Pifiguicula vulgaris), another insectivorous plant, 

 though somewhat rare, may be found near Poole and in Purbeck. 

 The Bog-Pimpernel {Anagallis tenella) is common not only in' 

 this south-east district, but will be met with in most other boggy 

 places of the county. On the drier margins of the bogs will 

 be found the Bog Gentian {Gentiana Pneumonanthe), and some 

 species of Orchis. The INIarsh Helleborine {Epipaclis palustn's) 

 is uncommon, but has been found in such places as the boggy 

 ground between Morden and Bloxworth. Wild Mignonette 

 {Reseda lutea), frequents the more cultivated ground, as also do 

 White Campion {Lychnis vesper Una), and St. John's Wort 

 {Hypericurn ietrapkrum). On the higher ground will be found 



