Introduction to Mushrooms Revised April 2000
by By Michael W. Beug Email: email@example.com
The Evergreen State College, Olympia WA
This slide by Kit Scates-Barnhart shows mushrooms growing in a ring. Initially spores started growing in the center of the ring producing hyphal threads in the soil that reach out in all directions for nutrients, as the nutrients are depleted, the hypae in the middle die and those on the outer edge reach out farther and farther soon producing a circle. Each year the circle grows larger. Knowing the rate of expansion of the circles and then measuring the diameters of some circles in unplowed grassy areas like Stonehenge in England has enabled to researchers to determine that some mycelial growths persist for many hundreds of years, producing mushrooms whenever conditions are right.