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Portions of the British Flora. /. 
Diagram 4. All the Thames species, 29 in number, occur in France, 
and their concentration in Kent is not unexpected. Genista pilosa , L., 
Orobanchc Picridis , Sch., and Cypcrus longus , L., extend to Pembroke, while 
Diagram 5. Distribution of 39 ‘ Channel ’ species. 
Ceratophyllum subniersum , L., appears in Carmarthen. Except for these 
outliers, the thinning out of the Thames species from their head-quarters in 
Kent is fairly uniform and quite pronounced when the larger provinces 
rather than small vice-counties are considered. 
Diagram 5. All but one of the 39 Channel species are found in 
France, and 14 are members of the southern element as defined by Stapf 
