In botany, apomixis was defined by Hans Winkler as replacement of the normal sexual reproduction by asexual reproduction, without fertilization.
Crepis, commonly known in some parts of the world as hawksbeard or hawk's-beard (but not to be confused with the related genus Hieracium with a similar common name), is a genus of annual and perennial flowering plants of the family Asteraceae superficially resembling the dandelion, the most conspicuous difference being that Crepis usually has branching scapes with multiple heads (though solitary heads can occur).
Evolution is change in the heritable characteristics of biological populations over successive generations.
George Ledyard Stebbins Jr. (January 6, 1906 – January 19, 2000) was an American botanist and geneticist who is widely regarded as one of the leading evolutionary biologists of the 20th century.
A geneticist is a biologist who studies genetics, the science of genes, heredity, and variation of organisms.
Plants are mainly multicellular, predominantly photosynthetic eukaryotes of the kingdom Plantae.
Polyploid cells and organisms are those containing more than two paired (homologous) sets of chromosomes.
The United States of America (USA), commonly known as the United States (U.S.) or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions.