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Updated: June 1, 2025
Every one knows the difference in the ray and central florets of, for instance, the daisy, and this difference is often accompanied with the abortion of parts of the flower. But, in some Compositous plants, the seeds also differ in shape and sculpture; and even the ovary itself, with its accessory parts, differs, as has been described by Cassini.
Stamens many, springing from the side of the tube or throat of the calyx, sometimes joined to the petals, generally equal in length; anthers small and oblong. Ovary smooth, or covered with scales and spines, or woolly, one-celled; style simple, filiform or cylindrical, with a stigma of two or more spreading rays, upon which are small papillae.
Upon the irritation caused by a bit of leaf, it will go sometimes through all the visible processes of fecundation, the ovary will swell and ripen, and in due time burst, with every appearance of fertility; but, of course, there is no seed. Beginners, therefore, must not be too sanguine when their bold attempts promise well. From that day Mr.
We have considered the evidence concerning the relation of the development and functional action of the milk glands to hormones arising in the ovary or uterus, now we have to consider the origin of the glands and of their peculiar physiology in evolution.
When killed no trace of ovary was in any of them; in every case it had been completely absorbed, and the uteri and vagina were diminished in size and anaemic. For grafting I used ovaries from young rabbits of various ages from seven days to six weeks or more, but all were equally unsuccessful.
Ovary covered with small cushions of short bristles, with sometimes a solitary spine in the centre of each cushion. Fruit 1 in. long, egg-shaped, red, edible. There is a large plant of this in the Succulent House at Kew which flowers almost annually, but it has never ripened fruits.
One point which Guthrie does not mention, and of which apparently he was not aware, is that the white of the White Leghorn is dominant to colour, the heterozygotes not being pure white but white with spots. Thus when he mated a black cock with a white hen with grafted ovary and obtained spotted chicks, this would have been the result if the original white ovary was functional.
The ovary is also malformed, having six or seven and sometimes probably more cells, and bearing ten to fifteen styles. The resulting fruit has a core character unknown in other apples but approached in certain apple-like fruits, as the medlar. The fruit, in such specimens as I have seen or read about, has no horticultural merit; but it is a curiosity of great botanical interest.
The curious formations and contents and the bizarre shapes are of great variety. Graves mentions a dermoid cyst containing the left side of a human face, an eye, a molar tooth, and various bones. Dermoid cysts are found also in regions of the body quite remote from the ovary.
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.
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