A type of bur to identify
I wish to identify a type of bur here in Ohio. It grows in semi - wooded areas or neglected weed areas.
It is very common in this area, but no one seems to be able to identify it although its characteristics are very distinctive.
It yields small roughly spherical burs < 1 cm in diameter. The leaves are unique. They appear fern like on the plant. The leaves are odd in that they alternate between larger fern like leaves to smaller leaves half the size of larger ones. They alternate from big to small one beside the other.
Warren County Ohio
Email some pictures directly to me at email@example.com.