Common Name: Horseweed (Canadian Fleabane, Mare's Tail, Hairy Fleabane)
Latin Name:Conyza canadensis (formerly Erigeron canadensis)
Family Name: Asteraceae/Compositae
Horseweed has some diuretic properties and is also a potential skin irritant. It is said to take up significant amounts of cadmium when grown on soil contaminated with heavy metals and is not palatable to pigs, sheep or cows, so it is best kept away from your tortoise enclosure.