Flora of Subantarctic Islands

Lyallia kerguelensis is a species of flowering cushion plant in the monotypic genus Lyallia of the family Montiaceae.

Plantago moorei, also called Moore's plantain, is a species of plant in the family Plantaginaceae. It is endemic to Falkland Islands. Its natural habitat is temperate shrubland. It is threatened by habitat loss.

Puccinellia macquariensis is a species of salt-tolerant, perennial, tufted grass in the family Poaceae. It is endemic to Australia's subantarctic Macquarie Island in the Southern Ocean, though very closely related to P. chathamica of New Zealand's southern offshore islands. It grows to between 4 and 25 cm in height and is common in dense patches on coastal cliffs and stacks. It flowers from November to June.

Nassauvia serpens, the snakeplant, is a species of plant in the family Asteraceae. It is endemic to the Falkland Islands. Its natural habitats are temperate shrublands, and rocky areas. Although assessed as Least Concern, it is experiencing continued habitat loss.

Deschampsia wacei is a species of grass in the family Poaceae. It is found in Tristan da Cunha in the South Atlantic. Its natural habitat is swamps.

Carex thouarsii is a species of sedge found in the Tristan da Cunha archipelago. It lives chiefly in heaths dominated by Blechnum palmiforme, and Phylica arborea woodland. It is widespread and common on Tristan da Cunha and Inaccessible Island, but scarce on Nightingale Island, possibly due to a lack of habitat. It was first described by Dugald Carmichael in 1819 following the British annexation of Tristan da Cunha in 1816.

Callitriche christensenii is a species of plant in the family Plantaginaceae. It is a hydrosubshrub endemic to Tristan da Cunha. Its natural habitats are rivers, freshwater marshes, and freshwater springs.

Atriplex plebeja is a species of plant in the family Amaranthaceae. It is endemic to Tristan da Cunha, including Inaccessible and Nightingale Islands. Its natural habitat is rocky shores. It is threatened by habitat loss.

Senecio vaginatus, the smooth ragwort, is a species of flowering plant in the aster family. It is endemic to the Falkland Islands. Its natural habitats are temperate shrubland, rocky shores and other rocky areas. It is threatened by habitat loss.

Rostkovia tristanensis is a species of flowering plant in the family Juncaceae, the rushes. It is endemic to Tristan da Cunha, where it occurs only on the main island and Gough Island. It grows in heath habitat with Empetrum. It is not uncommon on Gough Island, but it is rarely seen in flower.

Hamadryas argentea, the silvery buttercup, is a species of plant in the family Ranunculaceae. It is endemic to Falkland Islands. Its natural habitats are temperate dwarf shrub heath and temperate grassland.

Erigeron incertus, the hairy daisy, is a species of flowering plant in the family Asteraceae. It is found only in the Falkland Islands. Its natural habitat is temperate shrubland. It is threatened by habitat loss.

Azorella macquariensis, also known as Macquarie azorella or Macquarie cushions, is a species of cushion plant endemic to Australia’s subantarctic Macquarie Island. It was referred to the more widely distributed Azorella selago until 1989, when it was described as a separate species.

Agrostis trachychlaena is a species of grass in the family Poaceae. It is endemic to Inaccessible and Nightingale Islands, Tristan da Cunha. Its natural habitat is subantarctic grassland. Less than 250 mature individuals are thought to exist.

Plantago stauntonii is a species of flowering plant in the family Plantaginaceae that is endemic to Île Amsterdam and Île Saint-Paul in the French southern territories. Sir Heinrich Wilhelm Reichardt described P. stauntonii in 1871, naming it after Sir George Leonard Staunton, who collected specimens of it in 1793.

Nassauvia gaudichaudii, the coastal nassauvia, is a species of flowering plant in the family Asteraceae. It is found only in Falkland Islands. Its natural habitats are temperate shrubland, rocky areas, and rocky shores.

Lyallia kerguelensis is a species of flowering cushion plant in the monotypic genus Lyallia of the family Montiaceae.

Isolepis bicolor is a species of plant in the sedge family, Cyperaceae. The plant is endemic to Tristan da Cunha, Nightingale Island, Inaccessible Island and Gough Island. Its natural habitats are subantarctic forests, subantarctic shrubland, and swamps.

Gamochaeta antarctica, the Antarctic cudweed, is a species of flowering plant in the family Asteraceae. It is found only in the Falkland Islands in the South Atlantic Ocean, where its natural habitat is temperate dwarf shrub heath.

Elaphoglossum randii is a species of fern that grows only on the sub-Antarctic islands of Kerguelen and the Marion and Prince Edward Islands in the Indian Ocean.

Deschampsia robusta is a species of grass in the family Poaceae. It is found on Gough Island, near Tristan da Cunha in the South Atlantic Ocean.

Asplenium aequibasis is a species of fern in the family Aspleniaceae. It is found in Tristan da Cunha. Its natural habitat is subantarctic shrubland.

Agrostis media is a species of grass in the family Poaceae. It is found only in Tristan da Cunha. Its natural habitats are subantarctic shrubland, subantarctic grassland, rocky areas, and rocky shores.

Agrostis goughensis is a species of grass in the family Poaceae. It is found on Gough Island.

Agrostis delislei is a species of flowering plant in the family Poaceae. It is endemic to the subantarctic Amsterdam Island. It was first described by William Hemsley in 1884.

Corybas sulcatus, also known as the grooved helmet-orchid, is one of two helmet orchids endemic to Australia's subantarctic Macquarie Island, and the second to be discovered. The Latin specific epithet sulcatus means "grooved”, with reference to the prominent groove in the labellum boss. It is a small, terrestrial, tuberous, herbaceous plant that forms clonal colonies. The flower is erect, mostly dark red, 25–30 mm long and 10–14 mm wide. The flowering period is November–December. It occurs on the plateau uplands of the island, growing in wet grassy seepage areas. It can be distinguished from

Athyrium medium is a species of fern in the family Athyriaceae. It is found in Tristan da Cunha. Its natural habitat is subantarctic shrubland.

Phlebolobium maclovianum, known as Falkland rock-cress, is a species of flowering plant in the family Brassicaceae. It is endemic to the Falkland Islands, and is the only species in the genus Phlebolobium.

Cotula moseleyi, also known as Nightingale brassbuttons, is a species of flowering plant in the sunflower family. It has been found only in the Tristan da Cunha chain of islands in the South Atlantic Ocean. Its natural habitats are subantarctic forests, subantarctic grassland, rocky shores, and hillsides. It is threatened by habitat loss.

Senecio falklandicus, synonym Senecio littoralis Gaudich., is a species of flowering plant in the family Asteraceae endemic to the Falkland Islands. It is known as the woolly ragwort. Its natural habitats are temperate shrubland, rocky areas, and rocky shores. This species is threatened by habitat loss.