Four new Cryptocoryne (Araceae) from Sumatera, Indonesia: a new variety and three interspecific natural hybrids July 2019

Abstract
A new diploid variety, Cryptocoryne cordata var. wellyi from the Riau Province in Sumatera is described. Three interspecific natural hybrids are also described: the diploid C. ×ardyi, the triploid C. ×jambiensis and the tetraploid C. ×zukalii nothovar. sumateraensis, of which the tetraploid hybrid involves C. cordata var. diderici as one parent. The hybrids are sterile but propagate vegetatively, forming large stands. A key to the Cryptocoryne taxa of Sumatera is provided.

https://www.researchgate.net/publication/334761144_Four_new_Cryptocoryne_Araceae_from_Sumatera_Indonesia_a_new_variety_and_three_interspecific_natural_hybrids