North America, Europe, Asia
China, Eastern Asia, Japan
Lemna minor
Platycodon grandiflorus Astra series, Platycodon grandiflorus Fuji series, Platycodon grandiflorus 'Komachi', Platycodon grandiflorus 'Sentimental Blue'
21,22
A1, A2, A3, H1, H2, 1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24