The criticism may be raised by some who consult a volume of thiskind that in reality no definite line can be drawn between the uses ofsome plants for one purpose or for another purpose. This is admittedlya fact. It will be quite evident from a short study of the Index thatmany plants frequently have a distinct and definite value as adapted todifferent purposes.
Range of Material Covered. While the range of materialcovered by the lists is sufficient to meet the requirements of the averageproperty holder, the lists may be supplemented by additional andunusual varieties which, if selected, should be given unusual care.The information in this book has been compiled to cover the range ofmaterial which is adapted for use generally throughout the followingportions of the United States: The North Atlantic States, theGreat Lakes Region, the Central States as far west as the MissouriRiver and as far south as Arkansas. No lists have been compiled forthe Great Plains and the Rocky Mountain States, but special listshave been compiled for the Atlantic Coastal Plain from Virginia toMississippi; also for the Peninsula of Florida and for the region withina radius of one hundred and fifty miles from the Twin Cities. For thePacific Coast, lists have been prepared for the Oregon-WashingtonCoastal Plain. It should be borne in mind that plants which developone type of growth in a northern climate will develop another type ofgrowth, because of the longer growing season, in a southern climate.