. A manual of botany. Botany. MOEPHOLOGY OF EEPEODUCTIVE "OEGANS 139 petaloid or coloured as in Galtlia and Anemone. Its caly- cine nature in these cases can be determined by a comparative examination of other closely related flowers, as the Hellebore, where the true petals have undergone a curious change of form. In some cases the calyx appears absent, as in the Valerians and most UmbelliferEe. It is, however, only partly lost, being united throughout most of its length with the ovary, and only exposing a rim at the top of the latter. Suppression of a whorl of sporophyUs is not uncommon;
. A manual of botany. Botany. MOEPHOLOGY OF EEPEODUCTIVE "OEGANS 139 petaloid or coloured as in Galtlia and Anemone. Its caly- cine nature in these cases can be determined by a comparative examination of other closely related flowers, as the Hellebore, where the true petals have undergone a curious change of form. In some cases the calyx appears absent, as in the Valerians and most UmbelliferEe. It is, however, only partly lost, being united throughout most of its length with the ovary, and only exposing a rim at the top of the latter. Suppression of a whorl of sporophyUs is not uncommon; in such a case the flower is said to be iinperfect. The andrceoium or gyncecium may be thus suppressed, in either of which cases the flower is unisexual; if both are suppressed, as in certain florets in some of the Compositse, the flower is termed neuter. When the stamens are abortive it is xnstillate {fig. 258) ; when the pistil is absent it is staminate (fig. 257). Fig. 257. Fig. 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 Green, J. Reynolds (Joseph Reynolds), 1848-1914. London, J. & A. Churchill
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