The Golden Rules of ATV Safety as outlined by the ATV Safety Institute's Mike Mount (see sidebar on page 75) is a good place to start for personal safety issues.
Xanthium (cocklebur) is a genus of flowering plants in the sunflower tribe within the daisy family, native to the Americas and eastern Asia.
The cocklebur is a classic example of a short-day plant (i.e. it only flowers when the nights are long). At least one leaf of a cocklebur plant needs 15 hours of darkness to undergo various complex biochemical reactions leading to the release of a hypothetical flower stimulant called florigen..