. Our ferns in their haunts; a guide to all the native species. Ferns. 230 THE BOULDER FERN. ^ Occasionally it is slightly nanowed below. It is twice pinnate, the primary pinnae being oblong-lanceo- ate and the secondary oblong- ovate, deeply lobed and the lobes again toothed. The stipes are a shining chestnut-brown and about half the length of the fronds. There is not much difference in the appearance of fertile and ster- ile fronds ; indeed the sori are so inconspicuous that one has to look rather closely to see them at all and a magnifier is required to satisfactorily make out their parts.
. Our ferns in their haunts; a guide to all the native species. Ferns. 230 THE BOULDER FERN. ^ Occasionally it is slightly nanowed below. It is twice pinnate, the primary pinnae being oblong-lanceo- ate and the secondary oblong- ovate, deeply lobed and the lobes again toothed. The stipes are a shining chestnut-brown and about half the length of the fronds. There is not much difference in the appearance of fertile and ster- ile fronds ; indeed the sori are so inconspicuous that one has to look rather closely to see them at all and a magnifier is required to satisfactorily make out their parts. They are mostly situated on the outer margins of the pin- nules at the base of the segments. The indusium is fixed under the spor- angia and is held by a reflexed tooth of the segment. Under a lens it looks like a tiny green cup filled with round spore-cases. The fronds are minutely glandular-hairy and when bruised in the hand give off a strong, sweetish fragrance. The odour is very noticeable in the drying plants. During the haying season, whole BOULDER counties in eastern Pennsylvania are Dicksonia thoroughly perfumed by the fronds cut With the hay. Among its common names are fine-haired. 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 not perfectly resemble the original Clute, Willard Nelson, b. 1869. New York, F. A. Stokes Co
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1901
