. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. 156 SYSTEMATIC BOTANY. branches from the upper bundles unite to form the bundle in the lower internode. The class Equisetinese has but a single living genus, Equisetum, which contains about twenty-five species, most of them being small plants. In the Devonian and Carboniferous Ages there were many genera, forming an order Calamariece, which became extinct in the Permian Period. 2. Filicinae. The plants (non- se
. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. 156 SYSTEMATIC BOTANY. branches from the upper bundles unite to form the bundle in the lower internode. The class Equisetinese has but a single living genus, Equisetum, which contains about twenty-five species, most of them being small plants. In the Devonian and Carboniferous Ages there were many genera, forming an order Calamariece, which became extinct in the Permian Period. 2. Filicinae. The plants (non- sexual generation) of this class (Ferns) have a solid stem, with roots and broadly expanded leaves. They are mostly terrestrial, and all richly supplied with chloro- phyll. The spores are developed in sporangia on the surface or margins of the ordinary or modi- fied leaves. The leaves, called fronds, are circinate (Fig. 35) in their unfolding, and often divided and several times compound. On their under surface are the clusters of sporangia, or sori (Fig. 268, sr). The sorus may be naked, or covered by a membrane, called the indusium (Fig. 268, iri), which is of various shapes, and has various modes of attachment in the dif- ferent genera. The sporangia are generally roundish and pedicelled bodies. Each (in the Order Filiees) is sur- rounded by an elastic ring (annuhis), which contracts, and sets the spores free when ripe. The stems are mostly short, or creeping, but in the Tropics they are often of. Fig. 268. A Fern {Camptosarus rhizophyolllts)\/rtiTGT\A\ jor, Sop; in, indu- sium ; sptlf sporangium; spo, 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 Kellerman, William Ashbrook, 1850-1908. Philadelphia, J. E. Potter and Company
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1883
