Iowa Plants Notes, IV

In three former papers the writer has listed numerous plants new to our state, or noteworthy for other reasons. As might be expected a large number of these have been introduced from other portions of the United States or from foreign countries. Some of these plants may prove to be merely waifs, never becoming a permanent part of our flora, but this is a matter which only time can decide. Even some of our southern immigrants are steadily creeping northward, and are proving that they can withstand our severe northern winters, while some old world species find our rich soil very much to their liking, and are even more aggressive than in. their native habitats