Monoecious and Dioecious Trees – What’s the difference?


16th September 2019 | Info

We often use the terms ‘Dioecious’ and ‘Monoecious’ when talking about the reproduction of trees/plants. 


Here are the basic definitions applied to trees: 


  • Monoecious: Species that have separate male and female flowers on the same tree. 
  • Dioecious: Species that have male and female flowers on different trees. 

Monoecious Trees

Monoecious trees can produce flowers and set seed on their own, without the need for another individual pollinator. Most tree species are monoecious. 


Some monoecious trees include

Male and female Hazel flowers (Corylus avellana)

Close up of a male Hazel flower (Corylus avellana)

Dioecious Trees

Dioecious trees require another tree with a flower of the opposite sex in order to pollinate. It is quite rare for trees to be dioecious.


Some dioecious trees include:

Male White poplar catkin (populus alba)

Female White poplar catkin (populus alba)

But how do you tell whether your tree is dioecious or monoecious?

It can be quite hard to tell the difference but the telling factor in defining whether a tree is monoecious or dioecious is whether there are both male and female flowers, or only one sex of flower on it:


  • Male flowers have a stamen that contains pollen (looks like it has small filaments) 
  • Female flowers have a stigma which receives pollen 

Want to get listed on Directree?

Are you a tree surgeon? Click the button to claim your free listing and see our other membership options today!

Are you looking for a tree surgeon?

Are you looking for a professional in your area to help you? Click the button to search our database today!

Related Resources


How To Stump Grind

1st April 2019 | Info

Your tree surgeon should have considered underground services when pricing the job. If you...

Read More

How to Prepare Your Garden for Your Tree Surgeon

29th April 2019 | Info

Always make a nice cup of tea for your tree surgeon!

Read More
Guides Health & Safety

What is the Best High Viz for Tree Surgery

23rd August 2019 | Info

CLASS 3 – Is the highest protection level of retro-reflective material that is a...

Read More