221 
the Cretaceous and part of the Tertiary region of New Jersey, 
and is the northern analogue of the “Middle district" of South 
Carolina, as defined by geographers a century ago. Its soil 
being much richer than that of the pine-barrens, the area is now 
mostly under cultivation and pretty thickly settled, and natural 
vegetation is scarce (p. 82). The remaining forests are mostly 
deciduous, contrasting strongly with the evergreen pine-barrens. 
(See interesting notes on this point on pages 474 and 602.) 
Several isolated colonies of pine-barren (mostly bog) plants are 
known in this region (see p. 74, and several places in catalogue), 
and they are regarded, no doubt correctly, as relicts rather than 
as recent invasions, which is presumably true also of the numerous 
colonies of pioneer plants outside of the coastal plain in the 
states farther south. Only 22.4 per cent. of the angiosperms 
listed as characteristic of the middle district on pages 88—90 аге 
monocotyledons; which is less than half the percentage for the 
typical pine-barren plants. 
The short chapter on weeds (pp. 99-101) is very interesting. 
The author states there that such plants are comparatively rare 
and easily recognized in the pine-barren region, where they are 
chiefly confined to the vicinity of the older and larger settlements, 
where the native vegetation has been damaged or destroyed by 
civilization. Spontaneous encroachment of introduced plants 
upon ground occupied by natives is practically unknown. Sev- 
eral “native” species which behave like weeds in the pine-barrens 
are listed on page тоо, but there seems to be absolutely no 
evidence that they are native in New Jersey or anywhere near 
there. ' 
In the taxonomic catalogue, which makes up the greater part 
of the book, about 1,400 species of vascular plants are enum- 
erated, and nearly half a page is given to each. It is not a regular 
descriptive flora, but keys to all the species are included (at the 
request of the Museum authorities, the author says on page 34), 
and these keys are not merely copied from other books, but show 
considerable originality. This work differs from nearly all other 
local floras of similar scope in excluding known introduced species 
from the catalogue proper—though many of them are mentioned 
