They are located on reproductive branching structure in pollen sacs, often in groups of 4.
It is often in groups of 4. They are located in pollen sacs attached to another reproductive branching structure.
They are located in pollen sacs attached to another reproductive branching structure. It is often in groups of 4.
They are located in pollen sacs attached to another reproductive branching structure. It is often in groups of 4.