The response of plants to length of day and night based on the number of hours of light and darkness they receive. An example of a photoperiod response is budding or producing flowers. The whole of the female reproductive system of the flower. The pistil is composed of the ovary , style , and stigma . Developed by the anther , the dust-like grains of pollen have a distinctive shape and elaborately sculptured outer wall.
Pollen grains contain two cells, one of which forms a pollen tube with two sperm cells.
A fungal disease that appears as a white powder coating the surface of the leaves. Can be the result of leaves that remain wet for too long with inadequate circulation. Clip back leaves to improve circulation and spray with a baking powder and water mixture or a commercial fungicide. The stem tip that bears the parts of the flower and rests on the pedicel . A condition in which the roots of a plant have grown entangled in a tight mass, or completely filled a container.