| Orchidaceae | |
Calypso bulbosa fo. albiflora
| P.M. Br. | N. Amer. Native Orchid J. 1: 17 | 1995 |
| Orchidaceae | |
Calypso bulbosa fo. americana
| (R. Br.) P.M. Br. | N. Amer. Native Orchid J. 1: 17 | 1995 |
| Orchidaceae | |
Calypso bulbosa var. americana
| (R. Br.) Luer | Native Orchids U.S. & Canada 336 | 1975 |
| Orchidaceae | |
Calypso bulbosa fo. bulbosa
| | | |
| Orchidaceae | |
Calypso bulbosa var. bulbosa
| | | |
| Orchidaceae | |
Calypso bulbosa fo. candida
| Hyl. | | |
| Orchidaceae | |
Calypso bulbosa var. japonica
| (Maximova ex Kom.) Makino | Bot. Mag. (Tokyo) 19: 14 | 1905 |
| Orchidaceae | |
Calypso bulbosa nothovar. kostiukiae
| Catling | Native Orchid Conf. J. 9(1): 1-6 | 2012 |
| Orchidaceae | |
Calypso bulbosa fo. nivea
| P.M. Br. | N. Amer. Native Orchid J. 1: 17 | 1995 |
| Orchidaceae | |
Calypso bulbosa fo. occidentalis
| Holz. | Contr. U.S. Natl. Herb. 3(4): 251 | 1895 |
| Orchidaceae | |
Calypso bulbosa subsp. occidentalis
| (Holz.) Calder & Roy L. Taylor | Canad. J. Bot. 43(11): 1393 | 1965 |
| Orchidaceae | |
Calypso bulbosa var. occidentalis
| (Holz.) Cockerell | Torreya 16: 185 | 1916 |
| Orchidaceae | ** |
Calypso bulbosa var. occidentalis
| (Holz.) B. Boivin | Naturaliste Canad. 94(4): 522 | 1967 |
| Orchidaceae | |
Calypso bulbosa fo. rosea
| P.M. Br. | N. Amer. Native Orchid J. 1: 17 | 1995 |
| Orchidaceae | ! |
Calypso bulbosa var. speciosa
| (Schltr.) Makino | J. Jap. Bot. 3: 25 | 1926 |