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Updated: May 31, 2025
If a plant had the ovules erect, the stigmata divided, possessed the albumen, and was without stipules, it possibly would not be classed among the Rosaceæ. But it may want any one, or more than one of these characters, and not be excluded. The ends of a scientific classification are better answered by including it.
When the child discovers that the ovules are attached to the ovary by little stems, this very important question can be answered, How are the ovules nourished? They must have food, or they cannot develop into seeds. The sap, which is the food of the plant, runs through the little stems that hold the ovules to the ovary, and thus, entering the ovules, nourishes them. The ovule has no embryo.
Rarely all are changed into normal secondary ovaries with a stigma and with a cavity filled with ovules. Often the stigma is incomplete or even almost wanting, in other instances the ovules are lacking or the cavity itself is only partially developed. Not rarely some stamens are reduced and converted into thin hard stalks, without any appearance of an ovary at their tip.
Although the plants in these experiments appeared perfectly healthy, and although both the ovules and pollen of the same flower were perfectly good with respect to other species, yet as they were functionally imperfect in their mutual self-action, we must infer that the plants were in an unnatural state.
In the case of the prawn-like crabs, their movements were as coinstantaneous as in a regiment of soldiers; but this cannot happen from anything like voluntary action with the ovules, or the confervae, nor is it probable among the infusoria. Secondly, what causes the length and narrowness of the bands?
No wonder the inspired Psalmist exclaims; "The heavens declare the glory of God, and the firmament showeth his handiwork." But listen to the Darwinian exclamation: "The heavens declare the glory of my little whirligig, and the firmament showeth the immensity of my little ovules."
In the human being the womb has only a single cavity, and usually develops but a single embryo. Sometimes two ovules are matured at the same time. If fecundated, two embryos instead of one will develop, producing twins. Triplets and quadruplets, the results of the maturing of three or four ovules at the same time, occur more rarely.
Someway, it needs the stimulus from less closely related pollen in order to grow vigorously and perfectly. While the cross-fertilization of the same order of plants is so desirable, it is not possible for the pollen of one order to fertilize the ovules of another order. There must be a certain degree of similarity between flowers able to fertilize each other.
It is then dropped or carried by some external agent, wind, water or some member of the animal kingdom, on to the receptive surface of the carpel of the same or another flower. The carpel, or aggregate of carpels forming the pistil or gynaeceum, comprises an ovary containing one or more ovules and a receptive surface or stigma; the stigma is sometimes carried up on a style.
When he goes to his nest in the grass at evening, they will all have been drained of their nectar, and the petals will be wilted by the sun. But they have achieved their object, the ovules have been fertilized.
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