%0 Journal Article %A Suwidji Wongso %A Ni Putu Sri Asih %A Jan D. Bastmeijer %A Karen Rysbjerg Jsensen, William Reichert %A Marian Ørgaard %A Niels Jacobsen %T Four new Cryptocoryne (Araceae) from Sumatera, Indonesia: a new variety and three interspecific natural hybrids %D 2019 %J Taiwania %V 64 %N 3 %P 326-338 %U https://taiwania.ntu.edu.tw/abstract/1630 %X 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. %M doi:10.6165/tai.2019.64.326