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.
Moon Flower
Prickly pear cactus can reproduce by seed, root division and by cuttings from the paddles being individually rooted.
The name "burr" has origins in Old English, derived from the word "bur," which means "to carry" or "to bear." It is often associated with a prickly seed or seed case, reflecting the plant's ability to cling to fur or clothing. Additionally, it can refer to a rough or jagged edge, particularly in metalworking. The term has also been used in various contexts, including geology and linguistics, to describe different features or characteristics.