Burr
A prickly seed case is a protective structure that surrounds a seed and is covered in sharp or pointed projections. These prickles help deter animals from consuming or damaging the seed, allowing it to disperse and grow successfully.
The type of tree that has round prickly seed pods is called a sweet gum tree.
The answer to that is a string bean or a cactus seed they are mighty prickley! : )
The prickly balls that fall from trees are called "seed pods" or "cones."
Seed coat.
A thistle bird seed is a seed that comes from a prickly plant usually produces a purplish or yellowish flower.
germination
linseed.
The shell covering a seed is sometimes called a hull.
seed leaves
Moon Flower
Prickly pear cactus can reproduce by seed, root division and by cuttings from the paddles being individually rooted.