No. 423:] NOTES AND LITERATURE. 249 
an art of plant therapy, if this is ever to be possible or worth the 
establishment. 
The Flora of Tennessee.! — No living botanist is as familiar with 
the interesting plants of Tennessee as the venerable Dr. Gattinger, 
who, like the late Dr. Mohr of Alabama, has spent many years in 
field study and now brings together the results of his work. Ten- 
nessee is a state of diversified topography, and the systematic list 
is preceded by a discussion of the factors which influence plant 
distribution. Like Dr. Mohr, Dr. Gattinger adapts himself to the 
Neoamerican practices in nomenclature and to the phylogenetic 
classification of the Germans, though not without a word of protest. 
Whether or not he be followed in his philosophic ideas, they contain 
the kernel of much that is good. 
The Grasses of Iowa.*— In the prefatory note to this book 
Professor Calvin, the state geologist, tells us that the law creating the 
Iowa Geological Survey provides for the publication of bulletins on 
subjects of economic interest relating to the natural history of the 
state, and this consideration of one of the most important economic 
groups of plants forms the first of such bulletins. ‘The topics treated 
are: the general structure and physiological characters of Graminez ; 
purity and vitality of grass seed; cereals; fungus and bacterial 
diseases of grasses; the pastures and meadows of Iowa; weeds 
of meadows and pastures; chemistry of foods, and feeding; and 
lawns and lawn-making in the state. Professors Pammel and 
Weems are well equipped by training and opportunity for the con- 
sideration of these topics, and it is understood that the system- 
atic discussion of the group, for which Professor Lamson-Scribner 
will be largely responsible, is to constitute a second volume com- 
plementary to the one now used. 
Chlorophyll.?— No. 10 of the biologic series of Scientia presents 
in a manner not too technical for the layman the main facts concern- 
ing the chlorophyll function in plants as carried on under various 
external conditions. The structure, as wellas the function, under- 
goes adaptive modifications in response to these conditions, and the 
lGattinger, Augustine. Zhe Flora of O and a Philosophy » Botany. 
Nashville, 1901: 
? Pammel, L. H. ems J B., and Lassen Sodbuer: F. The Grasses of Towa. 
Des Moines, fool.’ 525 pp.; 2 
-3 Griffon, Ed. desiit, cbletvphsiliette et la structure des. plantes, 
Scientia, Biologie, No. 10. Georges Carré et C. Naud, Éditeurs. . Paris. 
