| Orchidaceae | ** |
Phragmipedium longifolium fo. album
| O. Gruss & Koop. | Orchid Digest 72: 133 | 2008 |
| Orchidaceae | |
Phragmipedium longifolium fo. chapadense
| (Campacci & R.Takase) Braem | Orchid Digest 80(1): 40–41 | 2016 |
| Orchidaceae | |
Phragmipedium longifolium var. chapadense
| (Campacci & R.Takase) O. Gruss | Orchid Digest 67: 232 | 2003 |
| Orchidaceae | |
Phragmipedium longifolium var. coloratum
| (Rchb. f.) Pfitzer | Pflanzenr. IV. 50(Heft 12): 49 | 1903 |
| Orchidaceae | |
Phragmipedium longifolium var. darienense
| (Rchb. f.) Hallier f. | Ann. Jard. Bot. Buitenzorg 14: 45 | 1897 |
| Orchidaceae | |
Phragmipedium longifolium fo. gracile
| (H.J. Veitch) O. Gruss | Caesiana 16: 40 | 2001 |
| Orchidaceae | |
Phragmipedium longifolium var. gracile
| Rolfe | | |
| Orchidaceae | |
Phragmipedium longifolium var. gracile
| (H.J. Veitch) Pfitzer | Pflanzenr. IV. 50(12): 49 | 1903 |
| Orchidaceae | |
Phragmipedium longifolium fo. hartwegii
| (Rchb. f.) Braem | Orchid Digest 80(1): 41 | 2016 |
| Orchidaceae | |
Phragmipedium longifolium var. hincksianum
| (Rchb. f.) Pfitzer | Pflanzenr. IV. 50(Heft 12): 49 | 1903 |
| Orchidaceae | |
Phragmipedium longifolium var. hincksianum
| (Rchb. f.) Stein | Orchid.-Buch 475 | 1892 |
| Orchidaceae | |
Phragmipedium longifolium fo. minutum
| O. Gruss | Caesiana 16: 40 | 2001 |
| Orchidaceae | |
Phragmipedium longifolium fo. roezlii
| (Rchb. f.) Braem | Orchid Digest 80(1): 42 | 2016 |
| Orchidaceae | |
Phragmipedium longifolium var. roezlii
| (Rchb. f.) Hallier f. | Ann. Jard. Bot. Buitenzorg 14: 45 | 1897 |
| Orchidaceae | |
Phragmipedium longifolium var. splendidum
| (Pucci) Pfitzer | Pflanzenr. IV. 50(Heft 12): 50 | 1903 |