Malpighiales
Family: Achariaceae
–No subordinate taxa
Family: Balanopaceae
–No subordinate taxa
Family: Bonnetiaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Bonnetia ptariensis | Steyerm. | 1978 | summit of Ptari-tepui, Canaima National Park, Bolívar State, Venezuela | Missing | Access |
Family: Calophyllaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Marila biflora | Urb. | 1925 | Haiti, Hispaniola | Missing | Access | |
| Mesua stylosa | (Thwaites) Kosterm. | - | Sri Lanka | Rediscovered? | Access | |
| Poeciloneuron pauciflorum | Beddome | - | India (Kerala, Tamil Nadu) | Rediscovered | Access |
Family: Caryocaraceae
–No subordinate taxa
Family: Centroplacaceae
–No subordinate taxa
Family: Chrysobalanaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Couepia meridionalis | Prance | 1875 | Brazil | Missing | Access | |
| Dactyladenia cinerea | (Engl. ex De Wild.) Prance & F.White | ? | Cameroon | Missing | Access | |
| Licania caldasiana | Cuatr., 1951 | ? | Colombia | Missing | Access |
Family: Clusiaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Chrysochlamys pavonii | Planch. & Triana | 1778 | Peru | Missing | Access | |
| Garcinia imberti | (Bourdillon, 1899) | - | Western Ghats (southern), Kerala, India | Rediscovered | Access | |
| Garcinia klabang | Miq. | 1800's | Sumatra, Indonesia | Missing | Access |
Family: Ctenolophonaceae
–No subordinate taxa
Family: Dichapetalaceae
–No subordinate taxa
Family: Elatinaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Bergia arenarioides | (Cambess.) Fenzl. | 1914 | Minais Gerais, Brazil | Missing | Access |
Family: Erythroxylaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Erythroxylum echinodendron | Ekman | ? | Cuba | Extinct in the wild | Access |
Family: Euphorbiaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Acalypha cardielii | I.Montero & G.A.Levin (2022) | 1932-1933 | Madagascar | Missing | Access | |
| Acalypha dikuluwensis | P.A. Duvign. & Dewit | 10 December 1959 | Dikuluwe, Katanga, Democratic Republic of Congo | Extinct | Access | |
| Acalypha ecuadorica | Pax & K.Hoffm. | 1897 | Ecuador | Missing | Access | |
| Acalypha eggersii | Pax & K.Hoffm. | 1893 | Ecuador | Missing | Access | |
| Acalypha fragilis | Pax & K.Hoffm. | 1934 | Brazil | Missing | Access | |
| Acalypha rubrinervis | Cronk | Stringwood, Red acalypha | 1870 | St Helena (central ridge) | Extinct | Access |
|
Acalypha subbullata
|
Pax & K.Hoffm. | (rediscovered) | Peru | Rediscovered | Access | |
| Acalypha wilderi | Merr. | 1929 | Rarotonga, Cook Islands | Extinct | Access | |
| Acalypha sp. nov. 'Rapa Nui' | - | subfossil | Rapa Nui (=Easter Island) | Extinct | Access | |
| Amperea protensa | Nees | (rediscovered) | Western Australia, Asutralia | Rediscovered | Access | |
| Amperea xiphoclada pedicellata | Henderson, 1992 | 1892 | Sydney, New South Wales, Australia | Missing | Access | |
| Beyeria cygnorum | (Müll.Arg.) Benth. | ? | Western Australia, Australia | Invalid (synonym) | Access | |
| Beyeria lepidopetala | F.Muell., 1859 | Short-petalled beyeria, Small-petalled beyeria | - | Western Australia, Australia | Rediscovered | Access |
| Bonania myricifolia | (Griseb.) Benth. & Hook.f. | ? | Cuba | Missing | Access | |
| Caryodendron angustifolium | Standl. | ? | Progresso, Chiriquí, Panama | Missing | Access | |
| Chamaesyce sebastinei | (Binojk. & N.P.Balakr.) V.S.Raju | - | Andhra Pradesh, India | Rediscovered | Access | |
| Claoxylon grandifolium | (Poir.) Müll.Arg. | ? | Mauritius & Réunion, Mascarene Islands | Extinct | Access | |
| Cleidion lemurum | McPherson | 1871 | Hienghène Caves, New Caledonia | Missing | Access | |
| Cnidoscolus fragrans | (H.B. K.) Pohl | ? | Cuba | Extinct | Access | |
| Croton aleuritoides | P.E.Berry, 2016 | - | Madagascar (northern) | Rediscovered | Access | |
| Croton anisatus | Baill. | ? | Madagascar | Extinct | Access | |
| Croton buchii | Urb. | 1924 | Haiti, Hispaniola | Missing | Access | |
| Croton chapelieri | Baill., 1861 | - | Madagascar (eastern) | Rediscovered | Access | |
| Croton chittagongensis | Chakrab. & N.P. Balakr., 1983 | 1939 | Bangladesh | Missing | Access | |
| Croton claussenianus | Baill. | - | Brazil | Rediscovered | Access | |
| Croton grangerioides | Bojer ex Baill. | (rediscovered) | Mauritius, Mascarene Islands | Rediscovered | Access | |
| Croton hadrianii | Baill. | - | Brazil | Rediscovered | Access | |
| Croton ichthygaster | L.B.Sm. & Downs | - | Paraná State & Santa Catarina State, Brazil (southern) | Rediscovered | Access | |
| Croton josephina | Müll.Arg. | (rediscovered) | Minas Gerais, Brazil | Rediscovered | Access | |
| Croton macrocarpus | Ridl. | ? | Telok, Selangor, Malaysia | Missing | Access | |
| Croton magneticus | Airy Shaw | (rediscovered) | Queensland (incl. Magnetic Island), Australia | Rediscovered | Access | |
| Croton poggei | Pax | 1882 | DR Congo | Missing | Access | |
| Croton staechadis | Baill. | - | Brazil | Rediscovered | Access | |
| Croton vatomandrensis | Leandri | - | Madagascar (eastern) | Rediscovered | Access | |
| Discoclaoxylon occidentale | (Muell. Arg.) Pax & Hoffm. | - | Sao Tomé and Principe | Rediscovered | Access | |
| Euphorbia alata | Hook. | - | Jamaica | Rediscovered | Access | |
| Euphorbia alcicornis | Baker | 1880 | Madagascar | Missing | Access | |
| Euphorbia baliola | N.E.Br. | (rediscovered) | Namibia | Rediscovered | Access | |
| Euphorbia boinensis | Denis ex Humbert & Leandri | 1920 | Madagascar (western) | Extinct | Access | |
| Euphorbia brevirama | N.E.Br. | (rediscovered) | South Africa | Rediscovered | Access | |
| Euphorbia burchellii | Müll.Arg. | (rediscovered) | Brazil | Rediscovered | Access | |
| Euphorbia capuronii | Ursch & Leandri | 1954 | Madagascar | Extinct in the wild? | Access | |
| Euphorbia carissoides | F.M.Bailey | - | north-east Queensland, Australia | Rediscovered | Access | |
| Euphorbia celastroides tomentella | Boiss. | 2000 | Oahu, Hawaiian Islands, USA | Missing | Access | |
| Euphorbia cereiformis | L. | 1600's? | South Africa? | Missing | Access | |
| Euphorbia conzattii | V. W. Steinmann, 2003 | - | Cerro Espino, Pochutla District, Oaxaca, Mexico | Rediscovered | Access | |
| Euphorbia crassipes | Marloth | (rediscovered) | Namibia & South Africa | Rediscovered | Access | |
| Euphorbia cyri | V. W. Steinmann, 2003 | - | Mexico | Rediscovered | Access | |
| Euphorbia daphnoides | Baill., nom. illeg. | ? | Rodrigues, Mascarene Islands | Missing | Access | |
| Euphorbia dressleri | V. W. Steinm. 2003 | ? | Mexico | Missing | Access | |
| Euphorbia golisana | N.E.Br. | (rediscovered) | Somalia | Invalid (synonym) | Access | |
| Euphorbia leandriana | Boiteau | (rediscovered) | Madagascar | Rediscovered | Access | |
| Euphorbia mayurnathanii | Croiz. | ? | Palghat Gap, Western Ghats, India | Extinct in the wild | Access | |
| Euphorbia milii milii | Des Moul. | Crown-of-thorns | ? | Madagascar | Extinct in the wild? | Access |
| Euphorbia milii splendens | (Bojer ex Hook.)Ursch & Leandri | Crown-of-thorns | ? | Madagascar | Extinct in the wild? | Access |
| Euphorbia neospinescens | Bruyns | 1942 | Chunya District, Tanzania | Missing | Access | |
| Euphorbia peltata | Roxb. | ? | India | Extinct | Access | |
| Euphorbia pirahazo | Jum. | ? | Madagascar (western) | Missing | Access | |
| Euphorbia piscidermis | M.G.Gilbert | (rediscovered) | Ethiopia | Rediscovered | Access | |
| Euphorbia ramofraga | Denis & Humbert ex Leandri | 1924 | Madagascar | Missing | Access | |
| Euphorbia remyi hanaleiensis | (Sherff) Degener & I. Degener | (rediscovered) | Kauai, Hawaiian Islands, USA | Rediscovered | Access | |
| Euphorbia sendaica musashiensis | (Hurus.) Hurus. | Kantō region, Honshu, Japan | Invalid (synonym) | Access | ||
| Euphorbia skottsbergii kalaeloana | (Sherff) | (rediscovered) | Oahu, Hawaiian Islands, USA | Rediscovered | Access | |
| Fontainea subpapuana | P.I.Forst. | 1971 | Papua New Guinea | Missing | Access | |
| Macaranga chatiniana | (Baill.) Müll.Arg. | ? | Asia | Invalid (synonym) | Access | |
| Macaranga sp. nov. 'Rapa Nui' | - | subfossil | Rapa Nui (=Easter Island) | Extinct | Access | |
| Manihot quinquefolia | Pohl | (rediscovered) | Brazil | Rediscovered | Access | |
| Manihot stellata | M.Mend. | 2009 | Bolivia | Missing | Access | |
| Manihot walkerae | Croizat | Walker's manihot | (rediscovered) | Mexico & USA | Rediscovered | Access |
| Manihotoides pauciflora | (Brandegee) D.J.Rogers & Appan | (rediscovered) | Mexico (northern) | Rediscovered | Access | |
| Monadenium coccineum | Pax, 1895 | Masai spurge | (rediscovered) | Kenya | Rediscovered | Access |
| Ostodes minor | (Thwaites) Muell.arg. | ? | Sri Lanka (south-west) | Missing | Access | |
| Pedilanthus coalcomanensis | Croizat, 1943 | (rediscovered) | México | Rediscovered | Access | |
| Pedilanthus pulchellus | Dressler | ? | Oaxaca, Mexico | Invalid (binomial replaced) | Access | |
| Pedilanthus tomentellus | B.L. Rob. & Greenm. | ? | Mexico | Invalid (binomial replaced) | Access | |
| Pycnocoma subflava | J.Léonard | 1960 | DR Congo | Missing | Access | |
| Tragia pogostemonoides | Radcl.-Sm. | 1937 | Tanzania | Missing | Access | |
| Trigonostemon diplopetalus | Thwaites | 1854 | Sri Lanka | Missing | Access | |
| Trigonostemon hartleyi | Airy Shaw | 1963 | Papua New Guinea | Missing | Access | |
| Trigonostemon praetervisus | Shaw, 1982 | 1828 | Bangladesh | Missing | Access |
Family: Euphroniaceae
–No subordinate taxa
Family: Goupiaceae
–No subordinate taxa
Family: Humiriaceae
–No subordinate taxa
Family: Hypericaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Hypericum gnidiifolium | A.Rich | 1865 | Ethiopia | Missing | Access | |
| Hypericum setiferum | Stef. | ? | ? | Invalid (synonym) | Access | |
| Hypericum subsessile | N. Robson | - | Sichuan Province & Yunnan Province, China | Rediscovered | Access |
Family: Irvingiaceae
–No subordinate taxa
Family: Ixonanthaceae
–No subordinate taxa
Family: Lacistemataceae
–No subordinate taxa
Family: Linaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Linum cratericola | Eliasson | Floreana flax | - | Ecuador | Rediscovered | Access |
Family: Lophopyxidaceae
–No subordinate taxa
Family: Malpighiaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Banisteriopsis magdalenensis | B. Gates | - | Rio de Janeiro state, Brazil | Rediscovered | Access | |
| Malpighia proctorii | Vivaldi | ? | Jamaica | Missing | Access | |
| Triaspis schliebenii | A.Ernst | 1935 | Lindi District, Lake Lutamba, Tanzania | Missing | Access |
Family: Ochnaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Medusagyne oppositifolia | Baker, 1877 | Jellyfish tree | - | Seychelles | Rediscovered | Access |
| Ochna braunii | Sleumer | 2001 | Tanzania | Missing | Access | |
| Ochna citrina | Gilg | 1901 | Tanzania | Missing | Access | |
| Ochna polyarthra | Verdc. | 1965 | Tanzania | Rediscovered | Access | |
| Ochna rufescens | Thwaites | ? | Sri Lanka (south-west) | Missing | Access | |
| Ochna schliebenii | Sleumer | 1934 | Tanzania | Missing | Access | |
| Ouratea alternifolia | (A. Rich.) Engl. | ? | Cuba | Missing | Access |
Family: Pandaceae
–No subordinate taxa
Family: Passifloraceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Adenia lewallei | A.Robyns | 1969 | Burundi | Missing | Access | |
| Adenia natalensis | W.J.de Wilde, 1971 | - | lower Tugela River Valley in central KwaZulu-Natal, South Africa | Rediscovered | Access | |
| Arboa antsingyae | (Arbo) Thulin & Razafim. | 1952 | Madagascar | Missing | Access | |
| Basananthe cupricola | Robyns ex G.A. Levin | 4 February 1980 | Katanga, Democratic Republic of Congo | Extinct | Access | |
|
Passiflora cuneata ssp. nov. ‘Miguel Molinari’ |
- | ? | Colombia & Venezuela | Extinct in the wild | Access | |
| Passiflora danielii | Killip, 1960 | - | Department of Antioquia, Colombia | Rediscovered | Access | |
| Passiflora elliptica | Gardner | (rediscovered) | Rio de Janeiro, Brazil | Rediscovered | Access | |
| Passiflora kwangtungensis | Merrill, 1934 | - | China | Rediscovered | Access | |
| Passiflora lanceolata | (Mast.) Harms | - | Peru | Rediscovered | Access | |
| Passiflora mariquitensis |
Mutis ex L.Uribe
|
(rediscovered) | Colombia | Rediscovered | Access | |
| Turnera pernambucensis | Urb. | - | Brazil | Rediscovered | Access |
Family: Peraceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Chaetocarpus pubescens | (Thwaites) Hook.f. | ? | Sri Lanka (south-west) | Missing | Access | |
| Pera aperta | Croiz. | ? | Panama | Missing | Access |
Family: Phyllanthaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Antidesma discolor | Airy Shaw | ? | ? | Invalid (synonym) | Access | |
| Antidesma keralense | Chakrab. & M. Gangop., 2000 | - | Western Ghats (southern), India | Rediscovered | Access | |
| Cleistanthus collinus | (Roxb.) Hook.f. | ? | Sri Lanka | Missing | Access | |
| Cleistanthus evrardii | J.Léonard | 1958 | DR Congo | Missing | Access | |
| Cleistanthus major | Airy Shaw | ? | Kemaman, Terengganu (south), Malaysia | Missing | Access | |
| Cleistanthus robustus | Muell.Arg. | ? | Sri Lanka (south-west) | Missing | Access | |
| Flueggea acicularis | (Croizat) G.L.Webster | (rediscovered) | China | Rediscovered | Access | |
| Maesobotrya pierlotii | J.Léonard | 1958 | DR Congo | Missing | Access | |
| Margaritaria hispidula | G.L.Webster | 1962 | Madagascar | Missing | Access | |
| Meineckia trichogynis | (Baill.) G.L.Webster | ? | Madagascar | Extinct or rediscovered | Access | |
|
Phyllanthus allemii |
G.L.Webster | (rediscovered) | Goiás, Brazil | Rediscovered | Access | |
| Phyllanthus aoraiensis | Nadeaud | 1857 | Tahiti, Society Islands, French Polynesia | Missing | Access | |
| Phyllanthus burundiensis | Jean F.Brunel | 1973 | Burundi | Missing | Access | |
| Phyllanthus comptonii | S.Moore | 1914 | New Caledonia | Missing | Access | |
| Phyllanthus fadyenii | Urb. | ? | Jamaica | Missing | Access | |
| Phyllanthus felicis | J.F.Brunel | 1930-1967 | Guinea | Missing | Access | |
| Phyllanthus hortensis | Govaerts & Radcl.-Sm. | ? | Unknown | Extinct in the wild? | Access | |
| Phyllanthus indigoferoides | Benth. | (rediscovered) | Northern Territory, Queensland & Western Australia | Rediscovered | Access | |
| Phyllanthus itatiaiensis | Brade, 1957 | (rediscovered) | Minas Gerais & Rio de Janeiro, Brazil | Rediscovered | Access | |
| Phyllanthus jaubertii | Vieill. ex Guillaumin | 1864 | New Caledonia | Missing | Access | |
| Phyllanthus mimicus | Webster | 1909 | Trinidad & Tobago | Missing | Access | |
| Phyllanthus oppositifolius | Baill. ex Müll.Arg. | ? | Mauritius, Mascarene Islands | Extinct | Access | |
| Phyllanthus rhizomatosus | Radcl.-Sm. | 1955 | Tanzania | Missing | Access | |
| Phyllanthus schliebenii | Radcl.-Sm. | 1935 | Tanzania | Missing | Access | |
| Phyllanthus veillonii | M.Schmid | 1978 | New Caledonia | Missing | Access | |
| Sauropus assimilis | Thwaites | pre-1991 | Sinharaja Biosphere Reserve, Sri Lanka (south-western) | Missing | Access | |
| Sauropus elegantissimus | Ridley | ? | Ulu Gombak Forest Reserve, Selangor, Malaysia | Invalid (synonym) | Access |
Family: Picrodendraceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Stachyandra imberbis | (Airy Shaw) Radcl.-Sm. | 1954 | Madagascar | Missing | Access | |
| Stachystemon nematophorus | (F.Muell.) Halford & R.J.F.Hend., 2003 | Three-flowered pseudanthus | - | Western Australia, Australia | Rediscovered | Access |
Family: Podostemaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Butumia marginalis | G. Tayl. | - | Cameroon & Nigeria | Rediscovered | Access | |
| Inversodicraea abbayesii | G.Taylor | 1950 | Guinea | Missing | Access | |
| Inversodicraea achoundongii | J.J.Schenk, Herschlag & D.W.Thomas | 1992 | Cameroon | Missing | Access | |
|
Inversodicraea senei |
Cheek | 2016 | Memve’ele Falls, Ntem River, Cameroon | Missing | Access | |
|
Inversodicraea tanzaniensis |
Cheek (2020) | 22 August 1931 | Ruhidji River, Tanzania | Missing | Access | |
| Ledermanniella batangensis | (Engl.) C. Cusset | c.1908 | Lobe Waterfalls, Cameroon | Missing | Access | |
| Ledermanniella lunda | Cheek | ? | Angola | Missing | Access | |
| Podostemum flagelliforme | Tul. & Wedd., Tulasne 1849 | - | Tocantins River, near Port Nacional, Brazil | Rediscovered | Access | |
| Saxicolella marginalis | (G.Taylor) C.Cusset ex Cheek | - | Cameroon & Nigeria | Rediscovered | Access | |
|
Saxicolella nana |
Engl. (1926) | (rediscovered) | Nyong river (near Mbalmayo), Cameroon | Rediscovered | Access | |
| Stonesia fascicularis | G.Taylor | 1950's | Guinea | Missing | Access | |
| Stonesia gracilis | G.Taylor | 1951 | Guinea | Missing | Access | |
| Thelethylax isalensis | (H.Perrier) C.Cusset | 1910 | Madagascar | Missing | Access | |
| Wettsteiniola accorsii | (Toledo) P.Royen | ? | Brazil | Extinct | Access |
Family: Putranjivaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Drypetes dussii | Krug & Urb. | (rediscovered) | Martinique | Rediscovered | Access | |
| Drypetes ochrodasya | Airy Shaw | 1938 | Sumatra, Indonesia | Missing | Access | |
| Drypetes porteri | (Gamble) Pax & K. Hoffm. | - | Western Ghats, India | Rediscovered | Access |
Family: Rafflesiaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Rafflesia schadenbergiana | Göppert, 1885 | Schadenberg's rafflesia | - | Mindanao, the Philippines | Rediscovered | Access |
| Sapria poilanei | Gagnep. | - | Cardamom Mountains, Cambodia & Thailand | Rediscovered | Access |
Family: Rhizophoraceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Cassipourea ceylanica | (Gardner) Alston, 1925 | - | India | Rediscovered | Access | |
| Cassipourea eketensis | Baker f. | ? | Eket, Nigeria (south-eastern) | Missing | Access | |
| Cassipourea obovata | Alston | 1911 | Mozambique | Missing | Access | |
| Cassipourea thomassetii | (Hemsl.) Alston | ? | ? | Invalid (synonym) | Access |
Family: Salicaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Banara wilsonii | Alain | ? | Cuba | Extinct | Access | |
| Casearia quinduensis | Tulasne | ? | Tolima (& Quindio), Colombia | Extinct | Access | |
| Casearia sessiliflora | Cambess. | ? | Rio de Janeiro, Brazil | Extinct | Access | |
| Casearia tinifolia | Vent. | 1976 | Mauritius, Mascarene Islands | Extinct | Access | |
| Dovyalis spinosissima | Gilg | ? | Malawi (southern) | Missing | Access | |
| Populus cataracti | Kom. | ? | Tajikistan | Invalid (synonym) | Access | |
| Ryania speciosa mutisii | Monach. | ? | Colombia | Missing | Access | |
| Xylosma ruizianum | Sleumer | 1930's | Peru | Missing | Access | |
| Xylosma serrata | (Sw.) Krug & Urb. | 1980 | Montserrat | Missing | Access | |
| Xylosma sp. nov. 'Rapa Nui' | - | subfossil | Rapa Nui (=Easter Island) | Extinct | Access |
Family: Trigoniaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Humbertiodendron saboureaui | Leandri, 1949 | ? | Madagascar (eastern) | Missing | Access |
Family: Violaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Isodendrion hawaiiense | H.St.John | ? | Hawaiian Islands, USA | Invalid (synonym) | Access | |
| Isodendrion hillebrandii | H.St.John | ? | Hawaiian Islands, USA | Invalid (synonym) | Access | |
| Isodendrion lanaiense | H.St.John | ? | Hawaiian Islands, USA | Invalid (synonym) | Access | |
| Isodendrion molokaiense | H.St.John | ? | Hawaiian Islands, USA | Invalid (synonym) | Access | |
| Isodendrion pyrifolium | A.Gray | (rediscovered) | Hawaiian Islands, USA | Rediscovered | Access | |
| Isodendrion remyi | H.St.John | ? | Hawaiian Islands, USA | Invalid (synonym) | Access | |
| Viola cryana | Gillot | Cry violet, Cry pansy | 1950's? | France | Invalid (synonym) | Access |
| Viola hissarica | Juz. | ? | Tajikistan & Uzbekistan | Extinct | Access | |
| Viola plantaginea | Webb ex Christ | ? | Spain | Invalid (synonym) | Access | |
| Viola stoloniflora | Yokota et Higa | 1982 | Okinawa Island, Ryukus, Japan | Extinct in the wild | Access |