Cucurbitales
Family: Anisophylleaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Anisophyllea impressinervia | Madani | 1972 | Malaysia | Missing | Access |
Family: Apodanthaceae
–No subordinate taxa
Family: Begoniaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
|
Begonia adscendens
|
C.B. Clarke | (rediscovered) | Manipur, India | Rediscovered | Access | |
| Begonia aliciae | C.E.C.Fisch. | (rediscovered) | Kerala, Western Ghats, India | Rediscovered | Access | |
| Begonia brevicaulis | A.DC. | (rediscovered) | Assam, India | Rediscovered | Access | |
| Begonia bufoderma | L.B.Sm. & Wassh. | ? | Brazil? | Extinct in the wild? | Access | |
| Begonia cladocarpoides | Humbert ex Aymonin & Bosser | 1912 | Madagascar | Missing | Access | |
| Begonia cowellii | Nash | ? | Cuba | Missing? | Access | |
| Begonia eciliata | Schulz. | pre-1911 | Trinidad & Tobago | Missing | Access | |
| Begonia eiromischa | Ridl. | Woolly-stalked begonia | November 1898 | Penang Island, Malaysia | Extinct | Access |
| Begonia elatostematoides | Merr. (1912) | (rediscovered) | Mindanao, Philippines | Rediscovered | Access | |
| Begonia fasciculata | Jack | (rediscovered) | Sumatra, Indonesia | Rediscovered | Access | |
| Begonia fischeri fischeri | Schrank | ? | Cuba | Missing? | Access | |
| Begonia jocelinoi | Brade | (rediscovered) | Atlantic Forest, Brazil | Rediscovered | Access | |
| Begonia kingdon-wardii | Tebbitt | (rediscovered) | Myanmar (=Burma) | Rediscovered | Access | |
| Begonia linearifolia | J. Sierra | ? | Cuba | Missing? | Access | |
| Begonia macrotis | Vis. | ? | Malesia? | Extinct in the wild? | Access | |
| Begonia morelii | Irmsch. ex Kareg. | ? | Tropical Asia? | Extinct in the wild? | Access | |
| Begonia parvilimba | Merr. | (rediscovered) | Mindanao, Indonesia | Rediscovered | Access | |
| Begonia promethea | Ridl., 1906 | (rediscovered) | Borneo, Indonesia | Rediscovered | Access | |
| Begonia rajah | Ridl. | (rediscovered) | Malaysia | Rediscovered | Access | |
| Begonia tessaricarpa | C.B. Clarke, J. Linn. Soc., 1880 | (rediscovered) | Upper Subansiri district, Arunachal Pradesh, India | Rediscovered | Access | |
| Begonia trullifolia | Guillaumin | ? | Madagascar? | Extinct in the wild? | Access |
Family: Coriariaceae
–No subordinate taxa
Family: Corynocarpaceae
–No subordinate taxa
Family: Cucurbitaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Cucumis ritchiei | (C.B.Clarke) Ghebret. & Thulin | (rediscovered) | Kerala, India | Rediscovered | Access | |
| Cucurbita okeechobeensis okeechobeensis | (Small) L.H.Bailey 1930 | Okeechobee gourd | (rediscovered) | Florida, USA | Rediscovered | Access |
|
Sicyos hillebrandii
|
H.St. John | Maui burr cucumber, Maui bur cucumber | ? | Maui, Hawaiian Islands, USA | Missing | Access |
| Sicyos villosus | Hook.f., 1847 | 1835 | Floreana, Galápagos Islands, Ecuador | Extinct | Access |
Family: Datiscaceae
–No subordinate taxa
Family: Tetramelaceae
–No subordinate taxa
Appendix 1: Possible additions to the list above
Begonia canarana (India)