C. Third Day's Welcome.—Four Stamens at Doorway.
D. Fourth Day.—Fall of Blossom. Its Mission fulfilled.
E. Fifth Day.—Pod Enlarging.
The flower bud usually opens in the morning, and shows a face as at A, which must be fully understood by looking at the side section shown at A¹.
The anthers and pollen are not yet ripe, but the stigma is ready, and now guards the doorway. To-morrow morning we shall see a new condition of things at that doorway, as seen at B and B¹. The stigma has now bent down out of the way, while two anthers have unfolded on their stalks and now shed their pollen at the threshold. The third morning, or perhaps even sooner, the other pair come forward, and we see the opening of the blossom as at C. Blossoms in all these three conditions are to be found on this cluster.
Fig. 1.