64 Berry: Mesozoic FLORA OF ATLANTIC COASTAL PLAIN 
striking new form of Artocarpus. None of the species of Ficus 
are individually abundant in the collections. Then follows the 
family Celastraceae with seven species. The family Apocynaceae 
has five species all of which are referred to the genus A pocynophyl- 
lum. The Euphorbiaceae, Rhamnaceae and Myrtaceae have 
four species each; and the Juglandaceae, Fagaceae, Ternstroe- 
maceae and Sapotaceae have three species each. The remaining 
families have only one or two species. The largest single genera 
are Myrica with eleven, Ficus with nine, and Celastrophyllum with 
‘six species. If the type represented by Celastrophyllum were 
combined with the forms which I refer to Ternstroemites but which 
were formerly referred to Celastrophyllum it would constitute the 
most abundant type in both differentiation and individual abun- 
dance. 
Among the one hundred five species of dicotyledons of the 
Ripley flora sixty-eight have entire margins. This is 64.7 per cent 
of the known forms. The ratio of entire dicotyledons leaves to 
the whole flora of woody dicotyledons has been shown by Bailey 
and Sinnott* to have a fairly constant relation to climatic condi- 
tions and altitude. According to the figures compiled by these 
authors subtropical and tropical lowland floras have over 70 
per cent of their woody dicotyledons with entire leaves. Their 
published percentages range from 71 per cent in the flora of Hong 
Kong to 86 per cent in the flora of the Malay States. In making 
comparisons with fossil floras one is always confronted with the 
incompleteness of the record although, on the other hand, the 
vast majority of fossil forms are arborescent, thus removing one 
disturbing factor. The Ripley flora is obviously a lowland 
coastal flora so that the question of altitude is eliminated. It 
would thus appear that the percentage of entire leaves accords 
well with the conclusions derived from the general facies of the 
flora and that the climate was probably warm temperate, rather 
uniform and with an abundant precipitation. 
It is interesting to see in this Ripley flora a characteristic 
local facies and this is especially the case, as might have been 
expected, among the dicotyledons. Nearly all of the ferns and 
all of the conifers have an outside distribution as befits their more 
* Bailey, I. W., & Sinnott, E. W. Science II. 41: 832-833. 1915. 
