Free images results:

Spiky pictures, stock photos and images


Grass Royalty Free Stock Photo
Author: Dshawley
Thorns Stock Photos
Author: Aki
Thorns Stock Photo
Author: Photong
Cactus Royalty Free Stock Photography
Author: Boddington
Solitary man Stock Image
Author: 3pi
Clematis Royalty Free Stock Photography
Author: Nickyv32

Also, here are some commercial RF-licensed images that match your search criteria:  
Spiky leaves Royalty Free Stock Photos
Author: Tomd

Explore more commercial options: More Spiky Stock Illustrations & Vectors | More Spiky Stock Video Footage