Carefully tear the corolla down the lines; you see, a very little pressure does it. Now we have the corolla in five parts, like five petals, only it is so weak it can no longer hold itself up. Once upon a time we think it grew this way, with five separate petals, only the petals stood up then, for they must have been stiffer and perhaps were not so long. It was long, long ago, oh, very long ago, that it had its five petals. Then the edges of the petals began to grow together, and they kept on doing this until, in course of time, the whole length of each petal had grown fast to the next one, all except that little tiny spot where the notch is. We are glad our morning-glory kept this little notch and the line where the sides of the petals grew together, for that is what tells us the story of long, long ago when all the petals were separate. When finally they were grown together, the corolla did not need to be so stiff, for its shape helped to make it firm, and then it no longer used good material to make stiffening for the petals, for that would have been a waste of plant sap, and plants do not like to waste materials. When they find they can get along without something they have been used to having, they stop making it. Life is too short and too precious to waste a bit of it. Our flower only kept the stiffening in the corolla along the paths where it wished the bees to go to its honey cups and where, when folded, it could best protect the bud. The morning-glory, you see, is as wise as it is beautiful. [Illustration: [Flower]] WHY ARE THE FLOWERS SO LARGE AND BRIGHT? Why are the flowers so large and bright? [Illustration: [Flower]] We cannot say that they were always so. It is probable they were not. But good Mother Nature has watched over them as they came upon the earth, and she has lovingly made them so large and bright. How could she do this? Let us see. Here is a tangle of plants. They all bear flowers and all set seeds. Some are stronger and more beautiful than others. The seeds fall to the ground. Those from strong and beautiful plants are larger and stronger than the others. After a while the seeds sprout. Not all do this, however. The very weakest do not sprout. Dear Mother Nature has other work for them. “You are not suited to struggle in the earth with the strong seeds, dears,” she whispers and lays them to rest. They do not wake up; the materials in them change. These materials let go of each other; they depart from the seed; some as gases float off in the air; others as minerals sink in the earth. The gases and the minerals are not lost. They join some other plant and help to make it strong. “It is better to help another than to try to grow yourselves,” Mother Nature whispers to these little seeds that could not sprout. And they are happy. They are glad to change into gases and minerals and help another plant to grow.