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 | | The family or genus of a fern is often determined by the shape of its indusium; e.g., the indusium of the woodsias is star-shaped; of the Dicksonias, cup-shaped; of the aspleniums, linear; of the wood ferns, kidney-shaped, etc. |
 | | The fronds of the marsh fern are apt to be sterile in deep shade. |
 | | The fragile bladder fern, as it is often called, and which the name _fragilis_ suggests, is the earliest to appear in the spring, and the first to disappear, as by the end of July it has discharged its spores and withered away. |
| www2.cddc.vt.edu /gutenberg/1/1/3/6/11365/11365.txt (18119 words) |
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