. Essentials of botany. Botany; Botany. 160 ESSENTIALS OF BOTANY very much like leaves, and in many cactuses the bracts about the flower are so sepal-like that it is impossible to tell where the bracts end and the sepals begin (Fig. 117). The same thing is true of sepals and petals in such flowers as the white water-lily. In this flower there is a remark- able series of intermediate steps, ranging all the way from petals, tipped with a bit of anther, through stamens with a broad petal-like filament, to regular stamens, as is shown. H ITiG. 118. Transitions from Petals to Stamens in Wliite Wate
. Essentials of botany. Botany; Botany. 160 ESSENTIALS OF BOTANY very much like leaves, and in many cactuses the bracts about the flower are so sepal-like that it is impossible to tell where the bracts end and the sepals begin (Fig. 117). The same thing is true of sepals and petals in such flowers as the white water-lily. In this flower there is a remark- able series of intermediate steps, ranging all the way from petals, tipped with a bit of anther, through stamens with a broad petal-like filament, to regular stamens, as is shown. H ITiG. 118. Transitions from Petals to Stamens in Wliite Water-Lily. E, F, G, H, various steps between petal and stamen. in Fig. 118, E, F, G, II. The same thing is shown in many double roses. In completely double flowers the stamens and pistils are transformed by cultivation into petals. In the flowers of the cultivated double cherry the pistils occasionally take the form of small leaves, and some roses turn wholly into green leaves. Summing up, then, we know that flowers are altered and shortened branches: (1) because flower-buds have, as regards position, the same kind of origin as leaf-buds: (2) because all the intermediate steps are found between bracts, on the one hand, and stamens, on the 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 Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1908
