84 
tains. I have already pointed out the different belts or zones due 
to altitude in the southern Rockies, not alluded to by Harshberger. 
The grass lands of the Rockies he dismisses with half a page, on 
561, and does not differentiate the various grass-covered areas, 
as for instance the lowland meadows with their practically 
eastern grass-flora, the table-lands with a flora similar to that of 
the Great Plains, the bench lands and alkali flats with their pre- 
dominantly endemic species, the dry grass covered ridges, the 
grassy mountain slopes, covered mostly by species of Festuca, 
the mountain tops and alpine meadows, all with their character- 
istic grass flora. Such things are simply omitted. 
А good phytogeographer should also be somewhat of a geolo- 
gist. Asthe writer makes no claim of being such, he has omitted 
discussion of Professor Harshberger's geological treatment. 
А good phytogeographer should also be a fair bibliographer 
and historian. The publications on the Rocky Mountain botany 
by M. E. Jones, Miss Eastwood, Blankinship and G. E. Osterhout 
seem to have escaped Harshberger's notice. Jones, especially, 
has published a good deal of taxonomic work with phytogeo- 
graphical notes, and also a short but good phytogeographic 
sketch well worth reading. 
. Professor Harshberger's part on floristic work is divided in 
several sections, of which the fifth treats of the Prairies, Arid 
Plains, and Rocky Mountains. Although the first part of this 
section does not treat of the Rocky Mountains, I was induced to 
read the same. As none of the reviewers of the book has called 
the attention to an incongruity in this part, I may do so here. 
It is surprising to find that the list of botanical explorers of the 
Prairies and Great Plains is headed by John and William Bar- / 
tram, Peter Kalm, Michaux, father and son, and Pursh. Mond" 
of these early explorers, except Michaux the younger, were west 
of the Alleghanian Region and the eastern part of the Region 
of the Great Lakes. Michaux the younger, went west as far as 
Ohio and Tennessee, perhaps to the Mississippi River. On the 
map at the end of the volume, the Prairie and Great Plain Region 
extends from Illinois to the Rockies, and Harshberger himself in 
the text, on page 510, limits the eastern boundary to central 
