"The plant fragments contain a thousand times more alkaloid than any naturally occurring plant."

There are real obstacles, starting with the tenacity of watermilfoil, which can spread from even a few broken plant fragments.

Later, they feed from within a case made from plant fragments.

Macerals are considered to be dehydrogenated plant fragments.

Reproduction can either be vegetative with tubers and plant fragments or sexual with seeds.

These biological remains include pollen, plant fragments, seeds, bones, shells, and insects.

Like hardened amber, the solidified waste is an ideal matrix to keep plant fragments intact for thousands of years.

However, it has escaped cultivation and spread via plant fragments and intentional plantings.

The plant fragments found on the suspension on the car were similar to the plants found on the crime scene.

Forensic botany can often establish whether plant fragments found on a victim or defendant have a unique origin.