This section is from the book "The Standard Cyclopedia Of Horticulture Vol2", by L. H. Bailey. See also: Western Garden Book: More than 8,000 Plants - The Right Plants for Your Climate - Tips from Western Garden Experts.
(Greek, bladder-fern). Polypodid-cese. Native ferns, with delicate foliage; deserve to be planted in the hardy fern garden.
Sori round, covered by a delicate indusium which is attached under one side and opens at the other, becoming hood-like in appearance and finally disappearing. The 5 species are native in the north temperate zone. Of easy cult, in shady, rich borders.
Bernh. Leaves 8-24 in. long, dark green, 3-5 in. wide, widest at the base, long tapering, tripinnatifid, bearing on the under surface of the rachis a series of bulb-like bodies, which germinate and prop, new plants. Canada to N. C. - Thrives best on lime-bearing rocks. Exceptionally useful and attractive on damp rocky banks.
Bernh. Fig. 1200. Leaves clustered, gray-green, 4-8 in. long besides the slender stalks, tripinnatifid, widest above the base. Widely distributed over the world at all altitudes. l. M. Underwood.
Fig. 1200. Cystopteris fragilis. (X 1/3)