You will know that it is made up of “flower leaves,” and that there is no calyx like that of a primrose, for instance. The corolla is a deep yellow tube, and to it the flower leaves are joined. If now we cut the flower in half, we find that there is a long rod, called the style, at the end of which is a kind of sticky knob, called the stigma; this you will see on Plate XXXVI. There are six smaller rods grouped round the style, and these are called the stamens. They are thickened at the end near the stigma, and the thickenings are called the anthers. The anthers are the pollen-bearing parts of the flower, and though their position often varies, you will find both anthers and stigma in nearly every kind of flower. Below the corolla of the daffodil is the ovary, and this is where the seeds are formed. If we look in the ovary of our daffodil, we shall see several tiny round objects of a transparent nature. These are called the ovules, and in time they may become seeds. There is a remarkable difference between an ovule and a seed, for if we planted one of the former, it would simply wither and decay in the ground. If, however, we set a seed, sooner or later a plant, like that from which the seed was taken, will spring up. An ovule only becomes a seed after it has been fertilised, and this is accomplished by some pollen being placed on the stigma. The style is a kind of tube, and is connected with the ovary, and when grains of pollen fall on the stigma they send out long shoots, called pollen tubes. These pollen tubes grow down the style till they reach the ovary. Each pollen tube then finds an ovule, forces its way in, and pours in nutrition from the pollen grain on the stigma above. The ovules then undergo certain important changes, and are turned into seeds. Pollen grains are of all sizes and shapes, but they are generally very tiny indeed. When I tell you that hundreds of grains of the kind would take up no more room than a pin-head, you will understand how very minute and wonderful are these tiny pollen tubes. The change in the ovules, which we have just read about, is called fertilisation, and we know that this is necessary to a plant if its ovules are to be changed into seeds. We might imagine that there is no difficulty about this in the cases of flowers where there are both anthers and stigma, but it is a law of Nature that it is not desirable for flowers to be fertilised by their own pollen. Why this should be we do not know, but it certainly is an actual fact. By this I do not mean to say that flowers cannot be fertilised by their own pollen, but that they produce healthier and more numerous seeds when fertilised by pollen from another plant. Pollen from another flower of the same plant will not do, but it should be from another plant altogether. Of course the two plants must be of the same kind, for it would not do to expect the pollen of a sweet-pea to fertilise a wallflower.