. Text-book of botany, morphological and physiological. Botany. FIG. of Candollea FIG. ^.-Diagram of Citrus FIG. 463—Diagram of Tiliaceae. (Dilleniaceae). (Aurantiacea;). the formula S2+2PXiSt4C„ must also be included here. Although in Epilobium and Trapa the calyx really consists of two whorls, this pseudo-whorl formed of two decussate pairs is followed by the other whorls exactly as if it were a true tetramerous whorl. But other dimerous and tetramerous flowers exhibit a more considerable deviation from the type, inasmuch as the two dimerous perianth-whorls which develope as if
. Text-book of botany, morphological and physiological. Botany. FIG. of Candollea FIG. ^.-Diagram of Citrus FIG. 463—Diagram of Tiliaceae. (Dilleniaceae). (Aurantiacea;). the formula S2+2PXiSt4C„ must also be included here. Although in Epilobium and Trapa the calyx really consists of two whorls, this pseudo-whorl formed of two decussate pairs is followed by the other whorls exactly as if it were a true tetramerous whorl. But other dimerous and tetramerous flowers exhibit a more considerable deviation from the type, inasmuch as the two dimerous perianth-whorls which develope as if they were a tetramerous calyx or corolla are followed by a staminal whorl which is superposed on the pseudo-whorl consisting of two decussate pairs, as in Urtica and other genera of the order, and in Proteaceae with the formula S2+2 £V4 Cx (Fig. 370). Among the dimerous and trimerous flowers of the orders Polycarpae and Cruciflorae, where they are the most perfectly developed, a tendency prevails for more than one whorl to go to the formation of the calyx, the corolla, the andrcecium, and even the gynaeceum, a tendency which may be expressed by the formula S^^...)Pp{+p^)S^94,..)CpUp^.)i for example, Fumariaceae, S2P2+2St2+... Cr Berberideae, Epimedium, S2+2 P2+2 St2+2 Cv 1 See Payer, Organogenie de la fleur, PI. 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 Sachs, Julius, 1832-1897; Vines, Sydney Howard, 1849-1934. ed. and tr. Oxford, Clarendon press
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1882
