British Ferns Clubmosses Horsetails

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Wayside, Seaside, and Rock Ferns CHAPTER III FERNS OF THE WAYSIDE AND SEASIDE ROCKS AND WALLS IN this and the three following chapters we shall visit the ferns in their homes. When there, we shall note how the leaves or fronds are cut or divided, and how the sori are arranged, whether on the backs or edges of the frond, whether covered by indusia or not, and whether borne on special fronds or on the ordinary leafy ones. We must do so if we wish to know the names of ferns, because the leaf divis
...ions and the arrange- ment of the sori are the chief guides on which we rely when we set out to identify ferns. As most ferns have their sori arranged on the backs and not at the edges of the fronds, we shall assume in our descriptions that the sori are dorsal (placed on the back) unless otherwise stated. Similarly, we shall assume that the sori are set on the ordinary leafy fronds, unless attention is called to the contrary. To make our study of ferns more interesting we shall recall many of the old beliefs that our ancestors held regarding these beautiful plants, We shall call first on those ferns which grow in the crannies of walls and rocks by the wayside and by the seaside.

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