Hi, my professor is asking me to write about the reproductive process of the Hydrangea macrophylla.
Could you thoroughly explain the process for me?

You will have to do the research - we aren't in the habit of doing student's homework for them.

I Googled "Hydrangea macrophylla pollination" and came up with a couple scientific papers. When using the internet for research, make sure of your source (I would use only papers from universities or colleges). Not everything on the internet is true. Another good resource will be your University library. Remember to cite your sources.

We can help if you come up with questions while researching your project.

To get more scientific papers than mixed sources, try searching with Google Scholar instead of plain Google:

https://scholar.google.ca/