219 
No attempt is made to describe the vegetation of the whole 
area systematically (for sufficient reasons, which the author 
explains on pages 33, 70 and 71); but under three of the geo- 
graphical divisions, namely, the pine-barrens, the middle district, 
and the strand, quite a number of the characteristic or more 
abundant or conspicuous species are classified by habitat; which 
perhaps had never been done before for the middle district 
and pine-barrens. The relative abundance of the plants in 
these lists is not indicated, and some of them are not arranged in 
any apparent order; but habitat lists are still somewhat of a 
novelty (probably 90 per cent. of these published in America 
up to the present time are less than 15 years old), and there are 
very few local floras as yet which treat them any more scientifi- 
cally than this one does. 
Nearly as much space is devoted to the pine-barrens as to 
the other four regions combined, for that is the most unique and 
at the same time the least disturbed by civilization. The author 
here points out (pp. 57-58, 72-75) how the boundaries of this 
region have been misinterpreted by previous writers. Some 
have treated the whole coastal plain as pine-barrens, while 
others—mainly geologists— have regarded the region in question 
as coinciding with the area underlaid by Tertiary formations. 
A few had already noticed that the southern and western por- 
tions of the Tertiary region of New Jersey are not to be classed 
as pine-barrens, but it seems to have remained for Professor 
Stone himself to make known (about ffve years ago*) the fact 
that between the pine-barrens and the coast, and extending 
some distance into the pine-barrens along the larger streams, 
is a strip of vegetation very similar to that of the middle dis- 
trict. This narrow belt of quasi-climax vegetation is not ex- 
plained, but it probably owes its existence very largely to the 
protection from fire on one or both sides afforded by the water- 
ways.T 
On pages 73, 215, 402, 454, 485, and 802 one finds an idea that 
seems to be entirely new, namely, that on the larger streams the 
* Proc. Phila. Acad. 59: 452-459. 1907. 
t See Bull. Torrey Club 38: 515-525. 1911. 
