. Plant studies; an elementary botany. Botany. Fig. 45. A fern (Aspidium), showing three large branching leaves coming from a hori- zontal subterranean stem (rootstock) ; growing leaves are also shown, which are gradually unrolling. The stem, young leaves, and petioles of the large leaves are thickly covered with protecting hairs. The stem gives rise to numerous small roots from its lower surface. The figure marked 3 represents the under surface of a portion of the leaf, showing seven groups of spore cases ; at 5 is represented a section through one of these groups, showing how the spore cases
. Plant studies; an elementary botany. Botany. Fig. 45. A fern (Aspidium), showing three large branching leaves coming from a hori- zontal subterranean stem (rootstock) ; growing leaves are also shown, which are gradually unrolling. The stem, young leaves, and petioles of the large leaves are thickly covered with protecting hairs. The stem gives rise to numerous small roots from its lower surface. The figure marked 3 represents the under surface of a portion of the leaf, showing seven groups of spore cases ; at 5 is represented a section through one of these groups, showing how the spore cases are attached and protected by a flap ; while at 6 is represented a single spore case opening and dis- charging its spores, the heavy spring-like ring extending along the back and over the top.—After Wossidlo. 5. 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 Coulter, John Merle, 1851-1928. New York, D. Appleton and Company
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Keywords: ., bookauthorcou, bookcentury1900, bookdecade1900, booksubjectbotany
