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As the plants are genetically identical from one generation to the next, each apomictic plant has the characters of a true species, maintaining their distinction from each other, despite having much smaller differences from other similar apomicts than is normal between species. They are therefore often called microspecies. In some genera, it is possible to identify and name hundreds or even thousands of microspecies, which may be grouped together as aggregate species, typically listed in Floras with the convention "Genus species agg." (e.g., the bramble, Rubus fruticosus agg.).
Good examples of apomixis can be found in the genera Crataegus ( hawthorns), Sorbus ( rowans and whitebeams), Rubus (brambles or blackberries), Hieracium ( hawkweedHawkweed Scientific classification Kingdom: Plantae Division: Magnoliophyta Class: Magnoliopsida Order: Asterales Family: Asteraceae Genus Hieracium Species Hieracium alpinum (Alpine Hawkweed) Hieracium aurantiacum ( Orange Hawkweed) Hieracium lachenaliis) and Taraxacum ( dandelionTaraxacum officinale ''Taraxacum japonicum ''Taraxacum albidum and a few others. The Dandelion ( genus Taraxacum of the family Asteraceae) is a tap-rooted annual or biennial plant, found in most temperate zones. Distribution and Etymology Dandelions weres).
A unique example of male apomixis has recently been discovered in the Saharan CypressThe Saharan Cypress ''Cupressus dupreziana is a very rare coniferous tree native to the Tassili n'Ajjer mountains in the central Sahara Desert, southeast Algeria, where it forms a unique population of trees hundreds of kilometres from any other trees. ( CupressusSee text The genus Cupressus is one of several genera within the family Cupressaceae that have the common name cypress for the others, see cypress (disambiguation). As currently treated, these cypresses are native to scattered localities in mainly warm te dupreziana), where the seeds are derived entirely from the pollenSEM image of pollen grains from a variety of common plants: sunflower Helianthus annuus , morning glory Ipomea purpurea ,hollyhock Sildalcea malviflora , lily Lilium auratum , primrose Oenothera fruticosa , and castor bean Ricinus communis . Pollen is a f with no contribution from the female "parent" (Pichot et al., 2000, 2001).
ParthenogenesisParthenogenesis ( Greek παρθενος, "virgin", + γενεσις, "birth") means the growth and development of an embryo or seed without fertilization by a male. Parthenogenesis is the animalSubkingdom Parazoa Porifera (sponges) Subkingdom " Agnotozoa" Placozoa Orthonectida Rhombozoa Subkingdom Metazoa "Radiata" Cnidaria Ctenophora (comb jellies) Bilateria Protostomia Acoelomorpha Platyhelminthes (flatworms) Nemertina (ribbon worms) Gastrotri equivalent of apomixis.