fern-leaved

Updated: June 4, 2025

Many other varieties have sprung from the type-species under similar conditions from time to time. A fern-leaved mercury, Mercurialis annua laciniata, was discovered in the year 1719 by Marchant. The type was quite new at the time and maintained itself during a series of years.

Hugo de Vries - Species and Varieties, Their Origin by Mutation