Hey, this is how I made the canopee/leaves for my last project : https://www.artstation.com/artwork/3QAL2
You can also download it for free here if you want to have the tutorial with you : https://gum.co/BoFGo
Edit 2 : Thanks 80.lv for publishing the tutorial on your website : https://80.lv/articles/creating-stylized-leaves-in-maya/
Don't hesitate to ask questions !
Hope this will be usefull for some of you !