Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . the sepals and petals are said to be transformed or metamor-phosed leaves; and the stamens and pistils are still more metamor-phosed, losing as they ordinarily do all appearance of leaves. Still,if these organs be, as it were, leaves developed in peculiar states,under the controlling agency of a power which has overborne theordinary forces of vegetation, they must always have a tendency to 345 346 develop in their primi
Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . the sepals and petals are said to be transformed or metamor-phosed leaves; and the stamens and pistils are still more metamor-phosed, losing as they ordinarily do all appearance of leaves. Still,if these organs be, as it were, leaves developed in peculiar states,under the controlling agency of a power which has overborne theordinary forces of vegetation, they must always have a tendency to 345 346 develop in their primitive form, when the causes that govern the production of blossomsare interfered with during their may then reverse the spell, and revertinto some organ below them in the series, asfrom stamens into petals, or pass at once intothe state of ordinary leaves. That is, organswhich from their position should be stamensor pistils may develop as petals or floralleaves, or else may revert at once to the stateof ordinary leaves. Such cases of retrogrademetamorphosis frequently occur in cultivatedflowers. 429. Thus we often meet with the actual reconversion of what. FIG. 345. A small leaf in place of a pistil from the centre of a flower of the double An organ intermediate between a leaf and a pistil, from a similar 347. Leaflet of a Brvophylluni, developing buds along its margins. ITS THEORETICAL STRUCTURE. 229 should be a pistil into a leaf in the double Garden Cherry, eithercompletely (Fig. 345), or else incompletely, so that the resultingorgan (as in Fig. 346) is something intermediate between the change of tvhat should be stamens into petals is of common oc-currence in what are called double and semi-double flowers of thegardens ; as in Roses, Camellias, Carnations, &c. When such flow-ers have many stamens, these disappear as the supernumerary petalsincrease in number; and the various bodies that may be often ob-served, intermediate betwe
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Keywords: ., bookauthorgra, bookcentury1800, bookdecade1860, booksubjectbotany
