. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. VARIATIONS IN STRUCTURE 28s. ranged on the stem; they are not arranged in definite rings or whorls. The white water Hly illustrates this point very well. In it we find the many petals spirally arranged. We also find parts which are partly petal and partly stamen. (See Figure 108.) The stamens and carpels as well as the petals are, as to number, numerous and indefinite. This latter characteristic is considered more primi- tive than the low and regular numbe
. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. VARIATIONS IN STRUCTURE 28s. ranged on the stem; they are not arranged in definite rings or whorls. The white water Hly illustrates this point very well. In it we find the many petals spirally arranged. We also find parts which are partly petal and partly stamen. (See Figure 108.) The stamens and carpels as well as the petals are, as to number, numerous and indefinite. This latter characteristic is considered more primi- tive than the low and regular number of parts which characterize most of our familiar flowers. In all these respects the water lily is regarded a rather primitive type of flower. Petals and sepals are either separate or more or less united. Flowers with these parts sepa- rate are conside"ed more primitive than those in which they are united. This ap- pKes especially to the petals. Some flowers have united petals, but separate sepals. The bluebell, the phlox, the morning-glory, and the petunia are common plants whose petals are united. {SetFiguresQsB, ioy,) Flowers Fig, ios. — Flowers of the American aspen (Populus Iremuloides); sometimes called the trembling aspen. It is dioecious. A shows a catkin composed of staminate flowers. B, pistillate catkin. C, a single pistillate flower with the characteristic scale which accompanies it. D, the staminate flower and 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
