. Principles of modern biology. Biology. Stamens Fig. 12-15. white water eral Biology, Co.) Transition from petals to stamens in the lily. (Redrawn after Asa Gray. From Gen- by Mavor. By permission of The Macmillan In form, the anthers are so highly modified as to be quite unrecognizable as leaves (Fig. 12-15). This is also true of the macrosporo- phylls (commonly called the carpels) which make up the innermost whorl, at the very center of the flower. In most flowers the car- pels are united, partially or completely, to form a single compound organ called the pistil (Fig. 12-14). Typically the
. Principles of modern biology. Biology. Stamens Fig. 12-15. white water eral Biology, Co.) Transition from petals to stamens in the lily. (Redrawn after Asa Gray. From Gen- by Mavor. By permission of The Macmillan In form, the anthers are so highly modified as to be quite unrecognizable as leaves (Fig. 12-15). This is also true of the macrosporo- phylls (commonly called the carpels) which make up the innermost whorl, at the very center of the flower. In most flowers the car- pels are united, partially or completely, to form a single compound organ called the pistil (Fig. 12-14). Typically the pistil con- sists of an enlarged hollow basal part, the ovule chamber, surmounted by a slender cyl- inder, the style, which terminates in a moist. Fig. 12-16. The tulip is one of the Monocotyledoneae. The flower displays 3 sepals, 3 petals, 6 stamens, and a compound pistil with a 3-branched stigma. (From Co//ege Botany, by Fuller and Tippo. Holt, Rinehart and Winston, Inc.) sporangia) in which the pollen grains1 (mi- crospores) are produced in great numbers. 1 The terms "pollen grain" and "microspore" are almost, but not quite, synonymous, since the micro- spore nucleus usually divides once before the pollen is 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 Marsland, Douglas, 1899-. New York, Holt, Rinehart and Winston
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectbiology
