Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . plications ofsingle stamens by collateral position of the stamens beforethe petals in these cases, as well asthat of the numerous petals in certaindouble Camellias, arranged through-out in five vertical ranks, is mostreadily explained by supposing a re-turn to the regular f or five-rankedphyllotaxis of leaves (240). 461. In the genuine Geranium (Fig. 421) the position of the outerof the two sets of stamens
Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . plications ofsingle stamens by collateral position of the stamens beforethe petals in these cases, as well asthat of the numerous petals in certaindouble Camellias, arranged through-out in five vertical ranks, is mostreadily explained by supposing a re-turn to the regular f or five-rankedphyllotaxis of leaves (240). 461. In the genuine Geranium (Fig. 421) the position of the outerof the two sets of stamens before the petals evidently resultsfrom the abortion of an exterior circle (486) ; and perhaps this isthe case in the Primrose family also. In the Barberry family thereis an apparent anteposition of the sepals, petals, and stamens through- FIG. 382. Diagram of the flower of the American Linden, in a cross-section of the A cluster of stamens with the petal-like body in the middle. FIG. 3S4. Flower of the Grape, casting its petals before expansion. 385. The same, with-out the petals : both show the glands distinctly, within the stamens. 3S6. Diagram of COALESCENCE OF ITS PARTS. 249 out. But this arises from the symmetrical augmentation of each setof organs into two circles, which in the expanded flower appear likeone. In the flower-bud of the Barberry the calyx is seen to consistof two alternating circles of sepals, three in each ; the corolla, of twocircles of petals, three in each ; the three exterior petals alternatingas they should with the inner circle of sepals, and the three interiorones alternating with these. But when the flower opens, the sixpetals, spreading apparently as one whorl, are necessarily opposedto the six sepals ; and the six stamens in two circles, which are stillmore confluent into one whorl, are equally opposed to these, taken sixand six ; although they really alternate in circles of three. In otherwords, decussating verticils of thre
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Keywords: ., bookauthorgra, bookcentury1800, bookdecade1860, booksubjectbotany
