As of September 2016, the International Union for Conservation of Nature (IUCN) lists 6645 least concern plant species. 30% of all evaluated plant species are listed as least concern. The IUCN also lists 131 subspecies and 118 varieties as least concern. No subpopulations of plants have been evaluated by the IUCN.
This is a complete list of least concern plant species, subspecies and varieties evaluated by the IUCN.
Algae
Chara hydropitys
Nitella flexilis, stonewort
Nitella mucronata
Nitella myriotricha
Nitella oligospira
Nitella pseudoflabellata
Nitella tenuissima
Nitella terrestris
Ochtodes crokeri
Pachymenia saxicola
Pleonosporium complanatum
Pugetia latiloba
Bryophytes
There are 14 bryophyte species assessed as least concern.
Mosses
Hymenostylium gracillimum
Orthotrichum scanicum
Wardia hygrometrica
Liverworts
Cheilolejeunea cedercreutzii
Cololejeunea azorica
Frullania polysticta
Herbertus borealis
Lepidozia azorica
Leptoscyphus azoricus
Luteolejeunea herzogii
Marsupella profunda
Plagiochila fuscolutea
Sauteria spongiosa
Stenorrhipis rhizomatica
Pteridophytes
There are 113 species, three subspecies, and one variety of pteridophyte assessed as least concern.
Leptosporangiate ferns
There are 78 species, three subspecies, and one variety in the class Polypodiopsida assessed as least concern.