Scattered seeds

AT this time of year, when seed catalogues are being eagerly studied by gardeners, it might be interesting to ponder a moment on the diversity of seeds themselves. Why do they differ and why do they set themselves in the most unlikely places?

If plants of the same species grew crowded together they would all take the same foods out of the soil. All their roots would be at the same level, absorbing moisture and foods, thus impoverishing the soil at that level, and their