Extinct plants

Silphium (also known as silphion, laserwort, or laser) was a plant that was used in classical antiquity as a seasoning and as a medicine.

Cynometra beddomei is a species of tree in the Fabaceae family.

Acalypha rubrinervis (string tree or stringwood) is an extinct plant in the spurge family (Euphorbiaceae), from the island of Saint Helena in the South Atlantic Ocean.

Gomidesia cambessedeana was a species of plant in the Myrtaceae family.

Argocoffeopsis lemblinii is an extinct relative of the coffee within the Rubiaceae family.

Pleuromeiaceae is an extinct family of plants related to living quillworts (Isoetes), but with tall stems and terminal compact cones.

Pausinystalia brachythyrsum was a species of plant in the Rubiaceae family.

Neomariopteris is a genus dating from the Permian and triassic Lower.

Oldenlandia adscensionis was a species of plant in the Rubiaceae family.

Guettarda retusa was a species of plant in the Rubiaceae family.

Blutaparon rigidum, sometimes known as the Galapagos amaranth, was a species of plant in the Amaranthaceae family.

Achyranthes atollensis (also called atoll achyranthes or Hawaiʻi chaff flower) was a species of plant in the Amaranthaceae family.

Heliotropium pannifolium, the Saint Helena heliotrope, is now extinct but was formerly a hairy-leaved small shrub up to 1 m in height.

Sauvallea is a genus of monocotyledonous flowering plants in the dayflower family, first described as a genus in 1871.

Sporobolus durus was a species of grass in the Poaceae family, found only on Ascension Island.

Madhuca insignis is a species of plant in the Sapotaceae family.

Adiantum lianxianense was a fern species in the Vittarioideae subfamily of the Pteridaceae.

Psidium dumetorum, the Jamaican guava or Jamaican psidium, was a species of plant in the Myrtaceae family endemic to Jamaica.

Persoonia prostrata was a shrub native to Fraser Island in Queensland in eastern Australia.

Sommerxylon a genus is described from petrified trunks of Gymnosperms that lived in the Triassic, found in the Caturrita Formation on Linha São Luiz in the municipality of Faxinal do Soturno in the region of Paleorrota.

Hernandia drakeana was a species of plant in the Hernandiaceae family.

Sartidia perrieri is a grass species endemic to Madagascar, known from only one collected individual and now considered extinct.

Ilex gardneriana was a species of plant in the Aquifoliaceae family.

Ormosia howii, the Hainan ormosia, is a species of legume in the Fabaceae family native to southern China.

Mathieua is a genus of South American plants in the family Amaryllidaceae.

Fitchia mangarevensis was a species of flowering plant in the Asteraceae family.

Kawizophyllum is an extinct genus that lived in the Permian.

Ochrosia tahitensis was a species of plant in the Apocynaceae family.

Pradosia argentea was a species of plant in the Sapotaceae family.

Mangifera casturi (also called Kalimantan Mango or Kasturi) is a species of plant in the Anacardiaceae family.

Pradosia glaziovii was a species of plant in the Sapotaceae family.

Acalypha wilderi was a species of spurge that was only known from forested habitats along the northern and western sides of Rarotonga in the Cook Islands, at elevations of 200–300 m.

Weinmannia spiraeoides was a species of plant in the Cunoniaceae family.

Anonidium usambarense was a tall tree in the Annonaceae family, formerly endemic to Tanzania.

Solanum bauerianum is an extinct species in the plant Solanaceae family.

Hesperelaea is a plant genus with only one species, probably now extinct.

Lysimachia minoricensis is a species of plant in the Primulaceae family.

Hopea shingkeng was a species of plant in the Dipterocarpaceae family.

Ilex ternatiflora is a possibly extinct plant in the Aquifoliaceae family.

Licania caldasiana was a species of plant in the Chrysobalanaceae family.

Ochrosia fatuhivensis was a species of plant in the Apocynaceae family.

Pluchea glutinosa is a species of flowering plant in the sunflower family that is endemic to the Island of Socotra in the Indian Ocean, part of the Republic of Yemen.

Pouteria stenophylla was a species of plant in the Sapotaceae family.

Neisosperma brownii was a species of plant in the Apocynaceae family.

Rauvolfia nukuhivensis is a species of plant in the family Apocynaceae.

Shorea cuspidata is a species of plant in the Dipterocarpaceae family.

Sterculia khasiana was a species of plant in the Sterculiaceae family.

Stenocarpus dumbeensis was a species of plant in the Proteaceae family.

Thismia americana, the banded trinity, was a species of flowering plant that was described and published as living in wetlands surrounding Chicago's Lake Calumet in the 1910s.

The Dwarf Ebony (Trochetiopsis melanoxylon) of the island of Saint Helena is related to Trochetiopsis ebenus (the Saint Helena ebony) but is now extinct in the wild.

Myoporum rimatarense is a plant in the figwort family, Scrophulariaceae and is endemic to Rimatara Island in French Polynesia.

Orbexilum stipulatum, commonly known as largestipule leather-root or Falls-of-the-Ohio scurfpea, was a flowering plant that was endemic to Rock Island in the Falls of the Ohio; an area of rapids and rocky limestone outcrops in Kentucky's portion of the Ohio River.

Stephanophyllites is an extinct genus that lived in the Permian.

Oeceoclades seychellarum is a terrestrial orchid species in the genus Oeceoclades that was endemic to the island of Mahé in the Seychelles but is now considered to be extinct.

Paschalococos disperta (Rapa Nui palm or Easter Island palm), formerly Jubaea disperta, was the native cocoid palm species of Easter Island.

Encephalartos brevifoliolatus, the escarpment cycad, is a cycad in the African genus Encephalartos.

The Saint Helena olive (Nesiota elliptica) was a plant from the monotypic genus of flowering plants Nesiota within the family Rhamnaceae.

Santalum fernandezianum was a species of plant in the Santalaceae family.

Hexagonocaulon is an extinct genus of bryophyte that lived during the Middle Triassic.

Mennegoxylon, commonly referred to as "snakewood", is a genus of now extinct trees exhibiting a cell structure resembling snake skin when viewed in cross section.

Psiadia schweinfurthii is a species of flowering plant in the Asteraceae family.

Radula visiniaca was a species of liverwort in the Radulaceae family.

Begonia eiromischa, commonly known as woolly-stalked begonia, is a presumed extinct plant from Malaysia.

Myrcia skeldingii was a species of plant in the Myrtaceae family.

Roystonea stellata is a species of palm endemic to Yagruma terrace in the Maisí region of Guantánamo Province in eastern Cuba.

Campomanesia lundiana, also known as the Rio de Janeiro myrtle, was a species of plant in the Myrtaceae family.

Wahlenbergia roxburghii (Roxburgh bellflower or dwarf cabbage tree) is an extinct member of a group of four species of Wahlenbergia once known from the island of Saint Helena, in the South Atlantic Ocean.

Wendlandia angustifolia is a species of plant in the Rubiaceae family.

Neomacounia nitida (Macoun's shining moss) is an extinct moss that was found only in a small area of Ontario, and the sole species in the genus Neomacounia.

Otophora unilocularis was a species of plant in the Sapindaceae family.

Pradosia mutisii was a species of plant in the Sapotaceae family.

Casearia quinduensis was a species of plant in the Salicaceae family.

Casearia tinifolia was a species of plant in the Salicaceae family.

Cnidoscolus fragrans is a tree endemic to the area around the capital city of Cuba.

Byttneria ivorensis is a tree in the Sterculiaceae family that is now classified as extinct.

Calochortus indecorus was a species of flowering plant in the lily family known by the common name Sexton Mountain mariposa lily.

Calochortus monanthus is an extinct North American species of flowering plant in the lily family known by the common names single-flowered mariposa lily and Shasta River mariposa lily.

Crudia zeylanica was a species of legume in the Fabaceae family.

Valerianella affinis was a species of plant in the Caprifoliaceae family.

Galipea ossana was a species of plant in the Rutaceae family.