alb Crypt. alba "> xAGU ×agusii = SEK x FUS NT0405 SW1847 West of Soko xARD x_ardyii Flower Emerse xBAT ×batangkayanensis = GRA X FER In 2004 Isa Ipor found an unknown Cryptocoryne in Western Sarawak that looked somewhat like C.×purpurea nothovar. purpurea from the Malay peninsula and gave it the working name "nothovar. sarawacensis" but proved to be a natural hybrid between C. cordata var. cordata and C. griffithii and is fully sterile. As var. cordata does not grow in Borneo at all, the close related C. cordata var. grabowskii could replace, but C. griffithii is only known from southern Borneo and is not reported from Sarawak. It was later found to be a hybrid between C. cordata var. grabowskii and C. ferruginea var. ferruginea who published their results in 2015. Ref: Cryptocoryne ×batangkayanensis (Araceae), a new hybrid from Sarawak xDEC decus-silvae Found to be a naturally occurring hybrid a cross of C. cordata and C. nurii. xHEN ×hendrae = STR x HUD Suwidji Wongso writes: "During trip with Hendra Budianto in 2003, we collected a few specimens of an interesting plant in the C. striolata habitat at Loksado, Mount Besar which I suspected to be natural hybrid between C. striolata and C. hudoroi. I cultures it and later it bloomed in my place. Fifteen years later it was finally confirmed and is indeed a natural hybrid between C. striolata and C. hudoroi. Unfortunately the collction spot has been cleared shortly after our visit and further collections there proved just to be striolata. When my previous system broken down in 2009, I sent it to Jan Bastmeijer who reports it is thriving and propagating very well in Europe and I was fortunate enough to get a plant from Niels Jacobsen in 2014. Long story short, we named it C. x hendrae. It has intermediate form of leaf and spathe of its parents and develop runners like hudoroi. xIKE ×ikezewaldiae xJAM ×jambiensis = NUR x BAK C. ×jambiensis, hybrid of C. bangkaensis and C. nurii same as old collection C. sp. Pijoan.

xNAK x_Nakamotoi = xPUR purpuraea CI2008 PUR Commercial import '08 Emerse PUR emerse habit Flower PUR inflorescence Johore Kota Tingga PUR 'Kota Tingga' Mawai PUR 'Mawai' Sg Sedili Ketchikan Submerse PUR Submerse habit Tasek Bera PUR 'Tasel Bera' From West (peninsular) Malaysia. xRAU1 xRAU2 xTIM x timahensis Emerse Flower Habitat Submersed A naturally occuring hybrid from one location in Singapore. xWIL x wilissii Flower Lucens The "old aquarium nevillii" is really wilissii - and are naturally occuring hybrids. There are many forms of this plant, for example the old "C. lucens" - this is not a sepcies, just another form of WIL. xYellow Ring COR x NUR "Cryptocoryne sp. „Yellow Ring“ has got the most commonalities with C. cordata var. cordata. Due to the fact that the pollen fertility is about 0% (Bastmeijer, personal communication), it must be a natural hybrid. It is questionable which species of Cryptocoryne are the parents. Because of the commonalities with C. cordata var. cordata (leaves, broad collar zone and yellow color of the spathe) C. cordata var. cordata comes into consideration to be one parent. Due to Nakamoto (2011) C. cordata var. cordata is growing in a distance of about one hour car trip from the locality of Cryptocoryne sp. „Yellow Ring“. The other parent could be C. nurii, which also occurs in this area." (Reitel 2011)