. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. Fig. 124. — Heads of dandelion. At the left is an open head as seen in the sunlight. At the right is the same head as it is at night. The bracts of the in- volucre are of two kinds, short outer ones (&) and long' inner ones (6'). The opening and closing is due chiefly to the movements of the inner Fig. 125. — Cyme of syringa, or mock orange. The terminal flower blossoms first. Note that the calyx is composed of sepals which, for about half the
. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. Fig. 124. — Heads of dandelion. At the left is an open head as seen in the sunlight. At the right is the same head as it is at night. The bracts of the in- volucre are of two kinds, short outer ones (&) and long' inner ones (6'). The opening and closing is due chiefly to the movements of the inner Fig. 125. — Cyme of syringa, or mock orange. The terminal flower blossoms first. Note that the calyx is composed of sepals which, for about half their length, are united. If .it is the stigma of another flower that the pollen reaches, that is cross-pollination; if it is the stigma of its own flower, that is close-polhnation. Evidently these are two quite distinct things. Close-polHna- tion is also called autogamy. Of cross-pollination there are two kinds; three if the polHnation of one kind of plant by the pollen of another kind be included. (i) The pollen may cross to the stigmas of flowers of the same. 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
