XVI. 
StATICE ARMERIA, PlANTAGO MARITIMA, aild SiLENE MARITIMA, 
whicli are found on the Sea Coast, occur also at particular localities in 
Teesdale and Wensleydale, far inland. 
It will he observed that of the eight districts into which we have 
divided the large area of Yorkshire, by far the richest in interesting 
and peculiar plants is the North Western Tract, in which the most 
characteristic rocks are Limestone and Basalt. How much of the peculiar 
character of the Flora of this part of the county is due to its mineral 
constitution is difficult to say, except in particular cases, because this is 
also the most elevated region of Yorkshire, and for that reason and its 
northerly position, ought apparently to nourish many plants not found 
elsewhere in the county. 
Perhaps this is the district in which hereafter by careful attention to 
selected localities, the predominant features of calcareous, arenaceous, 
and argillaceous soils may be best determined, since these mineral 
distinctions are here plainly exhibited and generally free from the 
difficulty occasioned in other tracts of Yorkshire by the superficial 
covering of alluvial and diluvial detrites. At present we have not 
collected on this subject data either numerous or accurate enough to 
furnish satisfactory inferences. 
