| Gesneriaceae | |
Ortholoma acuminatum
| (Benth.) Hanst. | Linnaea 26: 209 | 1853 [1854] |
| Gesneriaceae | |
Ortholoma alienum
| (C.V. Morton) Wiehler | Phytologia 27(5): 320 | 1973 |
| Gesneriaceae | |
Ortholoma ambiguum
| (Urb.) Wiehler | Phytologia 27: 320 | 1973 |
| Gesneriaceae | |
Ortholoma anisophyllum
| (DC.) Wiehler | Phytologia 27: 320 | 1973 |
| Gesneriaceae | |
Ortholoma calotrichum
| (Donn. Sm.) Wiehler | Phytologia 27: 321 | 1973 |
| Gesneriaceae | |
Ortholoma clarum
| (C.V. Morton) Wiehler | Phytologia 27(5): 321 | 1973 |
| Gesneriaceae | |
Ortholoma cristatum
| (Griseb.) Wiehler | Phytologia 27: 321 | 1973 |
| Gesneriaceae | |
Ortholoma dictyophyllum
| (Donn. Sm.) Wiehler | Phytologia 27(5): 321 | 1973 |
| Gesneriaceae | |
Ortholoma dielsii
| (Mansf.) Wiehler | Phytologia 27(5): 321 | 1973 |
| Gesneriaceae | |
Ortholoma dissimile
| (C.V. Morton) Wiehler | Phytologia 27: 321 | 1973 |
| Gesneriaceae | |
Ortholoma domingense
| (Urb.) Wiehler | Phytologia 27: 321 | 1972 |
| Gesneriaceae | |
Ortholoma erythrophyllum
| (Hanst.) Wiehler | | |
| Gesneriaceae | |
Ortholoma filipes
| (Oliv.) Wiehler | | |
| Gesneriaceae | |
Ortholoma formosa
| (C.V. Morton) Wiehler | Phytologia 27(5): 321 | 1973 |
| Gesneriaceae | |
Ortholoma herthae
| (Mansf.) Wiehler | Phytologia 27(5): 321 | 1973 |
| Gesneriaceae | |
Ortholoma heterophylla
| (Oerst. ex Hanst.) Wiehler | | |
| Gesneriaceae | |
Ortholoma illepidum
| (H.E. Moore) Wiehler | Phytologia 27: 322 | 1973 |
| Gesneriaceae | |
Ortholoma incarnatum
| (C.V. Morton) Wiehler | Phytologia 27: 322 | 1973 |
| Gesneriaceae | |
Ortholoma lehmannii
| (Mansf.) Wiehler | Phytologia 27: 322 | 1973 |
| Gesneriaceae | |
Ortholoma minor
| (Hook.) Wiehler | Phytologia 27: 322 | 1973 |
| Gesneriaceae | |
Ortholoma moorei
| (C.V. Morton) Wiehler | Phytologia 27: 322 | 1973 |
| Gesneriaceae | |
Ortholoma oblongifolium
| (Rusby) Wiehler | Phytologia 27: 322 | 1973 |
| Gesneriaceae | |
Ortholoma ochroleucum
| Klotzsch ex Oerst. | Centralamer. Gesner. 51 | 1858 |
| Gesneriaceae | |
Ortholoma parviflorum
| (C.V. Morton) Wiehler | Phytologia 27: 322 | 1973 |
| Gesneriaceae | |
Ortholoma pendulum
| Klotzsch ex Oerst. | Centralamer. Gesner. 52 | 1858 |
| Gesneriaceae | |
Ortholoma peruvianum
| (Zahlbr.) Wiehler | Phytologia 27(5): 322 | 1973 |
| Gesneriaceae | |
Ortholoma pubescens
| (Griseb.) Wiehler | Phytologia 27: 323 | 1973 |
| Gesneriaceae | |
Ortholoma repens
| (Hook.) Wiehler | Phytologia 27: 323 | 1973 |
| Gesneriaceae | |
Ortholoma roseum
| (C.V. Morton) Wiehler | Phytologia 27(5): 323 | 1973 |
| Gesneriaceae | |
Ortholoma sanguinolentum
| (Klotzsch ex Oerst.) Wiehler | Phytologia 27: 323 | 1973 |
| Gesneriaceae | |
Ortholoma serratum
| (Klotzsch ex Oerst.) Wiehler | Phytologia 27: 323 | 1973 |
| Gesneriaceae | |
Ortholoma tropicale
| (C.V. Morton) Wiehler | Phytologia 27(5): 323 | 1973 |
| Gesneriaceae | |
Ortholoma ulei
| (Mansf.) Wiehler | | |
| Gesneriaceae | |
Ortholoma venustum
| (Standl.) Wiehler | | |
| Gesneriaceae | |
Ortholoma vestitum
| Klotzsch ex Oerst. | Centralamer. Gesner. 51 | 1858 |
| Gesneriaceae | |
Ortholoma warscewiczianum
| Klotzsch ex Oerst. | Centralamer. Gesner. 51–52 | 1858 |