“Two or more individuals, originally derived from one plant by asexual propagation, which remain genetically identical (ICNCP Art. 2.5).” (see also vegetative propagation)

References

International society for horticultural science. International Code for the Nomenclature for Cultivated Plants, Ninth Edition. Scripta Horticulturae 18. Eds. Brickell, C.D., Alexander, C., Cubey, J.J., David, J.C., Hoffman, M.H.A., Leslie, A.C., Malécot, V., Xiaobai Jin. ISHS, Leuven, Belgium. June, 2016. Pp.190. ISBN: 978-94-6261-116-0. https://www.ishs.org/scripta-horticulturae/international-code-nomenclature-cultivated-plants-ninth-edition