C. beckettii: 2n = 28, 3n = 42
Sri Lanka
C. cognata: 2n = 28
India
C. nevillii: 2n = 28
C. parva: 2n = 28
C.: 2n = 28, 3n = 42
C. walkeri: 2n = 28, 3n = 42
C. wendtii: 2n = 28, 3n = 42
C. ×willisii: 2n = 28