. Elementary botany. Botany. : 321 present the only suggestion which it gives of belonging to the leaf series is the fact that the end is divided into three parts, the number of parts in eacli successi\'e whorl of members of the flower. If we cut across the body of this pistil and examine it with a low power we see that there are three chambers or cavi- ties, and at the junction of each the walls suggest to us that this body may have been formed by the infolding of the margins of three leaf-like members, the places of contact having then become grown together. We see als
. Elementary botany. Botany. : 321 present the only suggestion which it gives of belonging to the leaf series is the fact that the end is divided into three parts, the number of parts in eacli successi\'e whorl of members of the flower. If we cut across the body of this pistil and examine it with a low power we see that there are three chambers or cavi- ties, and at the junction of each the walls suggest to us that this body may have been formed by the infolding of the margins of three leaf-like members, the places of contact having then become grown together. We see also that from the incurved margins of each division of the pistil there stand out in the cavity oval bodies. These are the ovules. Now the ovules we have learned from our study of the gymnosperms are the sporangia (here the macrosporangia). It is now more evident that this curious body, the pistil, is made up of three leaf-like members which have fused together, each mem- ber being the equivalent of a sporophyll (here the macrosporo- phyll). This must be a fascinating observation, that plants of such widely different groups and of such different grades of complexity should have members formed on the same plan and belonging to the same series of members, devoted to similar functions, and yet carried out with such great modifications that at first we do not see this common meeting ground which a comparative study brings out so clearly. 645. Transformations of the flower oftrillium.— anther'^'locTef If anything more were needed to make it clear that on the margin, ^j^^ p^^.^^ ^^ jj.^^ ^^^^.^^ ^j- ^^i\X\\\m bcloug to the leaf series we could obtain evidence from the transformations which. Fig. ?Sr. Abnormal iim. The nine parts ut tlie perianth are green, and tlie uuter whorls of stamens are expanded into petal -like Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of thes
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