. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. HORSETAILS 423 curs at each joint. (See Figure 215.) Equisetums grow in both dry and wet places. They are often found on rail- road embankments. Reproduction. — Equisetums have un- derground stems as well as aerial stems and their underground stems live over winter. One of the commonest kinds produces branched shoots the spring before branched shoots pear. These un- in the ap- un- branched shoots bear a yellowish, cone-shaped structure at the top. (See Fig
. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. HORSETAILS 423 curs at each joint. (See Figure 215.) Equisetums grow in both dry and wet places. They are often found on rail- road embankments. Reproduction. — Equisetums have un- derground stems as well as aerial stems and their underground stems live over winter. One of the commonest kinds produces branched shoots the spring before branched shoots pear. These un- in the ap- un- branched shoots bear a yellowish, cone-shaped structure at the top. (See Figure 215.) This structure is composed of peculiar leaves, each of which is shaped like the letter T. Only the tops of the T's are vis- ible. The bottoms are attached to the stem. The tops fit closely to- gether, forming the surface of the cone. On their under sides these leaves bear spo-. Fig. 216. — Botrychium. The moonwort. One of the true ferns which does not bear its sporangia on the under side of the green leaves, but upon specialized parts. In this fern the uppermost part of the frond is de- voted to spore production. It is a case of partial differentiation of a 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
Size: 1096px × 2279px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
