( Qrontjum )and the Pitcher plants ( Sarracenia ) but there is absolutely 
no indication that they are a day older or a day younger or have more 
limited ranges on the Coastal Plain than genera with wide Adispersal 
over the southern hemisphere, such as the Pipeworts ( Eriocaulon) and 
the Yellow-eyed Grasses ( Xyris ). But Age and Area insists that the 
genera with wide ranges outside should have wider ranges "inside", 
i. e., in this case, on the Coastal Plain, 
Willis's correlary, "Size and Space", says "Phe larger a genus, the 
older it will be, within its own circle of affinity." The speaker 
tabulated the ranges of the largest (genera of Dicotyledons in temperate 
Worth America and. the ranges of all the genera closely related to them 
•nu 
and found that in all cases, such as Cinquefoils, the Blackberries, 
the Milk Vetches, the lupines and the Goldenrods, these overwhelmingly 
large genera are confined almost exclusively to the northern hemis¬ 
phere and have their greatest number of species in the geologically 
very young regions of Worth America, Europe and southwestern Asia; but 
that they are related to very small genera which are restricted to 
geologically ancient areas of the world. Conversely, in lew Zealand, 
the largest genus of plants is Hebe , a group of trees and shrubs con¬ 
fined to the Australasian and Fuegian regions; i.e, the antiquity of 
the largest genus in Hew Zealand is proved not as Age and Area would 
assert, because it is a cosmopolitan genus, but because it isjclearly 
a relic left in its two present areas by the destruction of ancient 
Antarctica. 
In closing the speaker said; In so far as my own studies of the 
floras o:l the northern hemisphere indicate, Age and Area is of little 
service. In fact, much of the evidence in the region runs absolutely 
