Unsodded

The reason why the railroads have had so much to do with the distribution of this weed, is that finding by the side of the tracks much unsodded ground, they spring up here in great numbers, and in the fall when they break off by the winds they are caught up the passing trains and carried away on the trucks or steps of the cars or on the pilot or in the machinery of the engine.

The chances of introducing plants which will become aggressive on uncultivated sodded lands are much less than on unsodded areas.