. The ferns of North America [microform] : colored figures and descriptions, with synonymy and geographical distribution, of the ferns (including the ophioglassaceae) of the United States of America and the British North American possessions. Ferns; Fougères. fl . ' â ( I ! !;â I' 198 FERNS OF NORTH AMERICA. «l. lanceolate or oblong-lanceolate, narrowed at the base, es- pecially the lower ones, and either rounded or subacute at the apex The sinuses between them arc rounded, and are gradually narrowed towards the apex of the frond. The segments are very minutely serrulate on the edges; the sm
. The ferns of North America [microform] : colored figures and descriptions, with synonymy and geographical distribution, of the ferns (including the ophioglassaceae) of the United States of America and the British North American possessions. Ferns; Fougères. fl . ' â ( I ! !;â I' 198 FERNS OF NORTH AMERICA. «l. lanceolate or oblong-lanceolate, narrowed at the base, es- pecially the lower ones, and either rounded or subacute at the apex The sinuses between them arc rounded, and are gradually narrowed towards the apex of the frond. The segments are very minutely serrulate on the edges; the smallest ones otherwise entire, and the larger ones either with sinuous margins or, in large fronds, deeply sinuous- pinnatifid. The texture is herbaceous, the surfaces perfectly smooth, the color of the upper surface grass-green, of the lower surface paler and slightly glaucescent. The fronds wilt very soon after plucking them, and in wilting there is a slight disposition to fold the segments together, face to face, for which reason the plant has received the name of " ; The first frost of autumn destroys the sterile fronds; and a late frost in May or June docs the same. The midribs are prominent, and the veins conspicuous; the latter being copiously reticulated into areoles which enclose no free veinlets. Along the sides of the midribs and mid- veins are very long and narrow areoles, and outside of these are obliquely-placed oblong areoles in several irregular rows. The fertile fronds are not very common, and a young botanist may search 'n vain for them for a long time. They stand only about half as high as the sterile fronds, and are very rigid. They are nearly black in color: in winter they dry up, but remain erect through the next summer, so that a fruiting plant often has fertile fronds standing of two years' growth. The frond is only a few (usually four to six) inches long,. Please note that these images are extracted from scanned page images
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Keywords: ., bookauthoreatondan, bookcentury1800, bookdecade1870, bookyear1879
