. The classification of flowering plants. Plants. 134 FLOWERING PLANTS [CH. with allied plants, to be the result of abortion (that is to say, the flower may be assumed to have been evolved from a type in which petals were present), the flower is apetalous. It is often difficult or impossible to say whether a flower is strictly mono- chlamydeous or apetalous. The internode between successive leaves or whorls is generally suppressed, though sometimes developed, as in some Caryophyllaceae, between calyx and corolla (when it is termed an anthophore), or between corolla and androecium, as in Passio
. The classification of flowering plants. Plants. 134 FLOWERING PLANTS [CH. with allied plants, to be the result of abortion (that is to say, the flower may be assumed to have been evolved from a type in which petals were present), the flower is apetalous. It is often difficult or impossible to say whether a flower is strictly mono- chlamydeous or apetalous. The internode between successive leaves or whorls is generally suppressed, though sometimes developed, as in some Caryophyllaceae, between calyx and corolla (when it is termed an anthophore), or between corolla and androecium, as in Passion- flower (the internode being termed a gonophore), or between the androecium and gynoecium, forming a gynophore, as in the Caper family. A growth of the axis may occur between the perianth and the androecium, or between the latter and the gynoecium, forming a disc, which is often honey-secreting, and forms a nectary. The disc may be ring-like, but varies much in Fig. 54. Flower of Ranunculus cut longitudinally. From Le Maout and Decaisne. In a complete flower, one that is which possesses calyx, corolla, stamens, and carpels, the order of succession of the series is as indicated, the growth of the floral axis terminating with the production of the gynoecium. Where, as may happen in abnormal cases, the axis goes on growing, a proliferous flower is the result. Frequently the ultimate position of the organs in space coincides with their order of development, the floral axis (receptacle, thalamus, or torus) assuming the form of a cone, at the apex of which is situated the gynoecium. Such a flower is said to be hypogynous, and the gynoecium superior (fig. 54). On the other hand, as happens in large groups of plants, the. 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 Rendle, A. B. (Alfred Barton), 1865-1
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplants, bookyear1904
