FLOWERS WITH PARTLY CONCEALED NECTAR III 
where Lepidoptera abound, these are more frequent visitors than elsewhere, although 
the flowers of this group everywhere receive a relatively greater number of lepido- 
pterous guests than do those of the previous group, for the nectar is here no longer 
so very inconveniently situated with reference to the long proboscis of such insects. 
Fic. 21. Flowers with partly concealed nectar. (1) Potentilla minima Haller. 
(2) Saxifraga rotundifolia Z. (3) Berberis vulgaris Z. 
The honey-bee is here met with as a much more eager visitor, and greater 
numbers of other long-tongued bees seek out the nectar, which is more conveniently 
situated for them, or collect the pollen that is usually present in abundance. 
It follows that the flowers of this group, as well as their insect visitors, are in 
a distinctly higher stage of development than the flowers and insects of the previous 
class. The degree of specialization of the insects corresponds to that of the flowers 
