A ABI albida AFF affinis ALB alba ANN annamica APO aponogetifolia AUA aura AUR auriculata B BAL balansae BAN bankaensis BAS bastmeijerii BEK beckettii BGI ciliata bogneri BOG bogneri BOR borneoensis BUL bullosa C CIL ciliata (2n=22) COG cognata (2n=28) CON consobrina COR cordata (2n=34) CRI crispatula (2n=24, 3n=54) CRO coronata (2n=34) D DEM CRI decus-mekongensis DEW dewitii DID cordata diderici E EDI edithiae (2n=51,68) ELL elliptica ERW erwinii F FER ferruginea (2n=34) FLA CRI flaccidifolia FUS fusca (2n=34) G GRA grabowski (4n=68) GRI griffithii (2n=34) H HEN C. yujii var. hendrikii HUD C. hudoroi HUL C. "huluensis" I IDE ideii ISA isae J JAC jacobsenii JOS joshanii JAY versteegii var. jayaensis K KEE C. keei KUB C. crispatula var. kubotae L LAT ciliata latifolia LIN lingua LON longicauda M MAT matakensis MEK mekongensis MIN minima MOE moehlmannii

N NEV nevellii NOR noritoi NUR nurii P PAL pallidinervia PAR parva PLA planifolia PLW palawanensis PON pontederiifolia PYG pygmaea R RAU raubensis REG regina RET retrospiralis S SAH sahalii SCH schultzi SCU scurrilis SEK FER sekadauensis SIA COR siamensis SIV sivadasanii SPC SPI cognatoides SPG SPI caudigera SPH SPI huegelii STR striolata SPI SPI spiralis T THW thwaitesii TIR tirtadinatae U UEN C. uenoi UND C. undulata UST C. usteriana V VER versteegii VIE vietnamensis VIL villosa VRC verrucosa W WAL walkeri WAS wasseri WEL cordata var. wellyi WEN wendtii WON wongsoi X Naturally occurring hybrids XAGU ×agusii = SEK x FUS XARD x_ardyii XBAT ×batangkayanensis = GRA X FER XDEC decus-silvae XHEN ×hendrae = STR x HUD XIKE ×ikezewaldiae XJAM ×jambiensis = NUR x BAK XNAK x_Nakamotoi = XPUR purpuraea XRAU1 XRAU2 XTIM x timahensis XWIL x wilissii XYellow Ring COR x NUR Y YUJ yujii var yujii Z ZAI zaidiana ZUK zukalii new ID Not Known Athwelthta Chaah Indonesia Kota Tingga Lingga Lingga 19 Lingga 2 Lingga 5 White Line Muarateweh Crypt. sp. Muarateweh N8 Nileshwar-b Riau C. sp. Riau "Rosenverig" Sekadau Sri Lanka Ghost Venus New / undescribed species, as yet undescribed. crosses GRAxMIN C. cordata grabowski x C. minima NURxMIN C. nurii x C. minima SIAxZAI C. cordata siamensis x C. zaidaina USTxWAL C. usteriana x C. walkeri WENxWAL X NEV (C. wendtii × C. walkeri) × C. nevillii WENxWAL X WENxNEV (C. wendtii × C. walkeri) × (C. wendtii × C. nevillii) ZAI x YUJ C. zaidaina x C. yujii It's important hybrids be documented - with so many species being natural hybrids we might "make" a known species from two others and it's also important is to see what crosses do not work.