. Our ferns in their haunts; a guide to all the native species. Ferns. THE MARSH FERN TRIBE. The first fronds are always sterile. They are thin, lanceolate, broad at base and once pinnate, with the pinnae set at right angles to the rachis. The latter are ob- long-linear, pointed and cut nearly to the midrib into many close, short, rather sori. rounded lobes. Bipinnate fronds with toothed or pinnat- ifid pinnules also occur. It is not until about the middle of July or later that the fertile fronds are produced. They are like the sterile in form, except that the pinnules are somewhat narrower an
. Our ferns in their haunts; a guide to all the native species. Ferns. THE MARSH FERN TRIBE. The first fronds are always sterile. They are thin, lanceolate, broad at base and once pinnate, with the pinnae set at right angles to the rachis. The latter are ob- long-linear, pointed and cut nearly to the midrib into many close, short, rather sori. rounded lobes. Bipinnate fronds with toothed or pinnat- ifid pinnules also occur. It is not until about the middle of July or later that the fertile fronds are produced. They are like the sterile in form, except that the pinnules are somewhat narrower and appear as if pointed, owing to the margins being re- flexed over the fruit when it is young. The sori are borne in a double row on each pinnule and are well on the way toward maturity when the frond unfurls. The indusium is kidney-shaped and soon withers. The spor- angia then spread out and often completely cover the under surface of the pinnule. Fronds midway between fertile and sterile also occur. In these the pinnules are flat and the less abundant sori are confined to the upper part of the frond and the tips of the lower pinnae. In deep shade, the marsh fern grows tall and slender but fruits sparingly; in sun, the fruit is abundant but the fronds lose much of their beauty, becoming thicker, yel- lowish and with pinnae strangely contorted. Both sorts of fronds are borne on long stipes, in some cases twice as long as the blades. The plant is commonly not fra- grant, though specimens have been reported that emitted an agreeable odour when drying. After the first sharp frost the fronds in exposed places wither, but in sheltered situations they remain green for a month or more longer. This species is frequently known as the lady fern—in- deed, its specific name signifies as much—but the real lady. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1901
