Stebbins system

The Stebbins system is an angiosperm plants classification drawn up by the American botanist G. Ledyard Stebbins (1906–2000). The system was published in the book "Flowering plants: evolution above the species level" (1974), and was followed by Vernon Heywood (b. 1927) in his "Flowering plants of the world" (1978).
Classification.
Flowering plants