Title: Floral Biology: Studies on Floral Evolution in Animal-Pollinated Plants / Edition 1, Author: David G. Lloyd
Title: Flowering Plant Origin, Evolution & Phylogeny / Edition 1, Author: David W. Taylor
Title: Evolutionary Trends in Flowering Plants, Author: Armen Takhtajan
Title: Flowering Plants: Evolution above the Species Level, Author: G Ledyard Stebbins