Right clicking on double high flowers produces more flowers

I was not expecting this when I was creating a garden of double high flowers.

What actually happened was...:
I right-clicked with bone meal to grow grass and various flowers, but when i accidentally right-clicked on a rose bush, another rosebush entity spawned.

Steps to Reproduce:
1. Plant Rose Bush, Peony, Lilac, or Sunflower
2. Obtain Bone Meal and right-click on double high flowers
3. produce endless supply of flowers