| GROUP VI | FERTILE AND STERILE FRONDS LEAF-LIKE |
entitles it to a more ready and universal recognition.
"The cheerful community of the polypody," as Thoreau calls it, thrives best on the flat surfaces of rocks. I recall the base of certain great cliffs where the rocky fragments, looking as though hurled from above by playful giants, are thickly covered with these plants, their rich foliage softening into beauty otherwise rugged outlines. Usually the plant is found in somewhat shaded places.
Tip of fertile frond
Occasionally it grows on the trunks of trees and on fallen logs, as well as on rocks and cliffs.
A few weeks ago I found its fronds prettily curtaining the cleverly hidden nest of a pair of black and white creepers. It is with good reason that these birds are noted for their skill in concealing their dwelling-place. This special afternoon, when persuaded by their nervous chirps and flutterings about the rocky perch where I was sitting that the young ones were close by, I began an investigation of my precipitous and very slippery surroundings which was not rewarded for an hour or more. Not till I had climbed several feet over the side of the cliff to a narrow shelf below, broken through a thicket of blueberries, and pushed aside the tufts of Polypody which hid the entrance to the dark crevice in the rocks beyond, did I discover the little nest holding the baby creepers.
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