. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. 422 THE VASCULAR PLANTS 77. Horsetails (Equisetales).—Equisetum means horse- tail. It is the name of the only surviving group of the Equisetales. In an- cient times other groups of Equisetales flourished and were very abundant. Now the only evi- dences left to us of these once great groups are fossils found in coal and in other kinds of rock. The horsetails or equisetums are also called the scouring- rushes. Probably you have seen them. They have slender,
. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. 422 THE VASCULAR PLANTS 77. Horsetails (Equisetales).—Equisetum means horse- tail. It is the name of the only surviving group of the Equisetales. In an- cient times other groups of Equisetales flourished and were very abundant. Now the only evi- dences left to us of these once great groups are fossils found in coal and in other kinds of rock. The horsetails or equisetums are also called the scouring- rushes. Probably you have seen them. They have slender, round, green stems which are jointed, and they are often much branched in such a way as to suggest a horse's tail. The stems are stiff and rather brit- tle. They may be easily pulled apart at the joints. A ring of small, brown, scale-like leaves oc-. FlG. 215. — One of the horsetails {Equisetum arvense). A, a vegetative shoot; note the scale- like leaves at the joints. B, the fertile shoots which, in this species, appear in spring before the vegetative shoots; note the cone-like strobili at the tops; these are composed of sporophylls which are closely fitted together. C, a single sporophyll. See page 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 G. (John Gaylord), b. 1876. New York, American Book Co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
