Flora of the South Sandwich Islands

This is a list of the flora of the South Sandwich Islands, a group of islands in the subantarctic Atlantic Ocean, part of the British overseas territory of South Georgia and the South Sandwich Islands. The list contains flora in the strict sense; that is, plants only. It comprises a single species of vascular plant, 38 mosses, and 11 liverworts. Unusually, not a single species is known to have naturalised on the islands; all are presumed native.

The islands also contain 5 species of fungus, 41 lichens and 16 diatoms.

Vascular plants

 * Deschampsia antarctica

Mosses

 * Andreaea gainii
 * Andreaea regularis
 * Anisothecium hookeri
 * Bartramia patens
 * Bracythecium austrosalebrosum
 * Bracythecium fuegianum
 * Bracythecium glaciale
 * Bryum argenteum
 * Bryum dichotomum
 * Bryum orbiculatifolium
 * Bryum pseudomicron
 * Bryum pseudotriquetrum
 * Campylopus introflexus
 * Campylopus spiralis
 * Ceratodon purpureus
 * Dicranella hilariana
 * Dicranoweisia brevipes
 * Dicranoweisia grimmiacea
 * Ditrichum gemmiferum
 * Ditrichum heteromallum
 * Ditrichum hyalinum
 * Ditrichum lewis-smithii
 * Hennediella antarctica
 * Kiaeria pumila
 * Notoligotrichum trichodon
 * Pohlia drummondii
 * Pohlia nutans
 * Polytrichastrum alpinum
 * Polytrichum juniperinum
 * Polytrichum piliferum
 * Polytrichum strictum
 * Racomitrium orthotrichaceum
 * Racomitrium sudeticum
 * Sanionia georgico-uncinata
 * Sanionia uncinata
 * Schizymenium austrogeorgicum
 * Syntrichia filaris
 * Syntrichia princeps

Liverworts

 * Cephalozia badia
 * Cephaloziella varians
 * Clasmatocolea rigens
 * Cryptochila grandiflora
 * Lepidozia chordulifera
 * Lophocoela lenta
 * Lophozia chordulifera
 * Marchantia berteroana
 * Pachyglossa dissitifolia
 * Riccardia georgiensis
 * Triandrophyllum subtrifidum