. Fundamentals of botany. Botany. SEED-BEARING PLANTS 447 reality, a flower; or they may be megasporophylls. In the latter case they may occur on the main stem, as in Cycas (Fig. 291), or grouped on a specialized branch, forming a cone, as in Macrozamia (Fig. 289).^ 399. Perfect and Lnperfect Flowers.—A flower having stamens but no carpels, or carpels but no stamens is. Fig. 331.—Flowers of a rex begonia; staminate above; pistillate below; one of the latter with the perianth removed to show the ovary and stigmas. (Photo by Elsie M. Kittredge.) unable, by itself, to produce seed, and is hence c
. Fundamentals of botany. Botany. SEED-BEARING PLANTS 447 reality, a flower; or they may be megasporophylls. In the latter case they may occur on the main stem, as in Cycas (Fig. 291), or grouped on a specialized branch, forming a cone, as in Macrozamia (Fig. 289).^ 399. Perfect and Lnperfect Flowers.—A flower having stamens but no carpels, or carpels but no stamens is. Fig. 331.—Flowers of a rex begonia; staminate above; pistillate below; one of the latter with the perianth removed to show the ovary and stigmas. (Photo by Elsie M. Kittredge.) unable, by itself, to produce seed, and is hence called an imperfect flower (Figs. 331-333)- A species in which the imperfect flowers occur on separate plants is dioecious. ' Whether the carpellate cone of Pinus is a flower or a cluster of flowers (inflorescence), has long been debated. There is strong evidence for con- sidering it a cluster of flowers, since the individual scales are probably not simple sporophylls. (Cf., p. 419.). 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 Gager, C. Stuart (Charles Stuart), 1872-1943. Philadelphia, P. Blakiston's son & co.
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