Complex sentence: Cultivar names are usually given to superior plants with the expectation of propagating that plant; all genetically identical copies of a plant, regardless of method of propagation (divisions or clones) share a cultivar name.
Split into simpler sentences: Cultivar names are usually given to superior plants with the expectation of propagating that plant. All genetically identical copies of a plant, regardless of method of propagation (divisions or clones) share a cultivar name.