Oxalidales
Family: Brunelliaceae
–No subordinate taxa
Family: Cephalotaceae
–No subordinate taxa
Family: Connaraceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Connarus beyrichii | Planch. | (rediscovered) | Brazil (southeastern) | Rediscovered | Access | |
| Connarus ecuadorensis | Schellenb. | (rediscovered) | Ecuador | Rediscovered | Access |
Family: Cunoniaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Geissois ternata serrata | A. C. Sm. | 1937 | Waya Island, Yasawa Islands, Fiji | Missing | Access | |
| Weinmannia henricorum | Bernardi | 1928 | Madagascar | Missing | Access | |
| Weinmannia spiraeoides | A.Gray | 1840 | Ovalau, Fiji | Extinct | Access | |
| Weinmannia ysabelensis | L.M.Perry | 1932 | Solomon Islands | Missing | Access |
Family: Elaeocarpaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Elaeocarpus blascoi | Weibel, 1972 | Blascoi('s) elaeocarpus | (rediscovered) | Tamil Nadu, Western Ghats, India | Rediscovered | Access |
|
Elaeocarpus burebidensis |
Elmer | ? | Mt. Apo, Mindanao, Philippines | Missing | Access | |
| Elaeocarpus gaussenii | Weibel | (rediscovered) | Tamil Nadu, India | Rediscovered | Access | |
| Elaeocarpus hypadenus | Miq. | 1800's | Sumatra, Indonesia | Missing | Access | |
| Elaeocarpus integripetalus | Miq. | 1800's | Sumatra, Indonesia | Missing | Access | |
| Elaeocarpus ngii curtisii | Weibel ex Coode | ? | Penang Island, Malaysia | Missing | Access | |
| Elaeocarpus occidentalis | Tirel | 13 August 1955 | Madagascar | Missing | Access | |
| Elaeocarpus submonoceras procerus | (Aug. DC.) Weibel | 1908 | Cuernos Mountains, Philippines | Missing | Access | |
| Elaeocarpus sp. nov. 'Rapa Nui' | - | subfossil | Rapa Nui (=Easter Island) | Extinct | Access | |
|
Tetratheca deltoidea
|
J.Thompson, 1976 | (rediscovered) | Western Australia, Australia | Rediscovered | Access | |
|
Tetratheca elliptica
|
J. Thompson, 1976 | ? | Australia | Invalid (synonym) | Access | |
| Tetratheca fasciculata | J.Thompson, 1976 | Cronin's tetratheca | 1895 | Wagin area, Western Australia, Australia | Extinct | Access |
| Tetratheca fordiana | R.Butcher, 2005 | (rediscovered) | Western Australia, Australia | Rediscovered | Access | |
| Tetratheca gunnii | J. D. Hook., 1855 | Shy pinkbells | (rediscovered) | Tasmania, Australia | Rediscovered | Access |
| Tetratheca spartea | (Benth.) R.Butcher | (rediscovered) | Near Toodyay, Western Australia, Australia | Rediscovered | Access |
Family: Huaceae
–No subordinate taxa
Family: Oxalidaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Dapania pentandra | Capuron | ? | Madagascar | Extinct in the wild | Access | |
|
Oxalis fragilis
|
T.M.Salter | pre-1936 | Moorreesburg, Western Cape Province, South Africa | Missing | Access | |
| Oxalis hygrophila | Dreyer | 2001 | Pakhuis Pass, Western Cape Province, South Africa | Missing | Access | |
| Oxalis involuta | T.M.Salter | 1935 | Porterville, Western Cape Province, South Africa | Missing | Access | |
| Oxalis levis | T.M.Salter, 1944 | (rediscovered) | Malmesbury, Western Cape Province, South Africa | Rediscovered | Access | |
| Oxalis perineson | T.M.Salter & Exell | 1932-1935 | Moorreesburg, Western Cape Province, South Africa | Missing | Access | |
| Oxalis pseudo-hirta | T.M.Salter, 1944 | 1930 | Du Toit's Kloof to Robertson, Western Cape Province, South Africa | Missing | Access | |
| Oxalis purpurata | Jacq., 1798 | (rediscovered) | Bokkeveld Escarpment near Nieuwoudtville, Northern Cape Province, South Africa | Rediscovered | Access | |
| Oxalis variifolia | Steud. | ? | Northern Swartland, Western Cape Province, South Africa | Missing | Access |
Appendix 1: Possible additions to the list above