. Lessons in nature study. Nature study. PLANTS WITHOUT FI^OWERS 121 The class may take up the following concerning the fern. Any commot fern will answer for study See the whole plant, with leaves(fronds),undergrouna stem or root stalk, and roots coming off from this. Ex- amine the leaves and find on the backs of some the spore-bearing organs. These are arranged differently in different ferns. In many, as shown in figure 75, they are in round dots. Examine with a hand lens these dots, and each dot will be found to consist of a bunch of little roundish knobs, each knob born on a small curved st
. Lessons in nature study. Nature study. PLANTS WITHOUT FI^OWERS 121 The class may take up the following concerning the fern. Any commot fern will answer for study See the whole plant, with leaves(fronds),undergrouna stem or root stalk, and roots coming off from this. Ex- amine the leaves and find on the backs of some the spore-bearing organs. These are arranged differently in different ferns. In many, as shown in figure 75, they are in round dots. Examine with a hand lens these dots, and each dot will be found to consist of a bunch of little roundish knobs, each knob born on a small curved stalk. Figure 76 shows one of these stalks with the surmounting knob highly magnified. The little knobs are capsules which con- tain spores (fig. 76). The stalk with the capsule is called a sporangium. When the spores are ripe the stalk straightens out. Fig. 75. A leaf of a fcrn showing the underside with numerous dots which are made up of the the Capsule breaks Open and Bpore-bearitA J organs. the spores fall out. By sowing the spores under proper conditions and caring for. 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 Jenkins, Oliver Peebles; Kellogg, Vernon L. (Vernon Lyman), 1867-1937. joint author. San Francisco, The Whitaker & Ray Company
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