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.
Polypodiales
Species
Acrostichum aureum, golden leather fern Acrostichum danaeifolium Acrostichum speciosum Adiantum capillus-veneris, maidenhair fern Aspidium ochthodes Asplenium aequibasis Asplenium formosum, showy spleenwort Athyrium medium Athyrium solenopteris Blotiella stipitata Bolbitis appendiculata Bolbitis presiliana Bolbitis semicordata Bolbitis subcrenata Ceratopteris cornuta Ceratopteris thalictroides Cyclosorus ciliatus Cyclosorus interruptus, Hottentot fern Didymochlaena truncatula Diplazium chimborazense Diplazium esculentum Diplazium filamentosum, black-scale fern Dryopteris corleyi, Costa Verde male-fern Elaphoglossum beddomei Elaphoglossum nilgiricum Elaphoglossum stelligerum Lellingeria rupestris Leptochilus decurrens Lindsaea kirkii Lorinseria areolata Microlepia trapeziformis Microsorum pteropus Nephrolepis exaltata Onoclea sensibilis Onoclea struthiopteris, ostrich fern Oreogrammitis pilifera Polypodium mindense Polypodium segregatum Polypodium tridens Pseudophegopteris dianae, brown-scale fern Pseudophegopteris pyrrhorachis Pteridium aquilinum Pteris barkleyae Pteris paleacea, lays-back fern Pteris usambarensis Pteris vittata, ladder brake Thelypteris palustris, marsh fern Thelypteris semilunata Thelypteris tetragona, freetip maiden fern Thelypteris xylodes Woodwardia virginica
Subspecies
Pteris albersii subsp. mufindiensis Pteris albersii subsp. uaraguessensis Thelypteris tetragona subsp. aberrans
Varieties Asplenium formosum var. carolinum
Hymenophyllales
Crepidomanes intramarginale Crepidomanes maximum Trichomanes angustatum Trichomanes speciosum, Killarney fern
Cyatheales
Alsophila nilgirensis Cyathea humilis Cyathea parksiae, rough tree-fern
Salviniales
Azolla microphylla Azolla nilotica Azolla pinnata, ferny azolla Marsilea aegyptiaca, Egyptian water-clover Marsilea apposita Marsilea berhautii Marsilea burchellii Marsilea coromandelina Marsilea crenata Marsilea ephippiocarpa Marsilea fenestrata Marsilea minuta, dwarf water clover Marsilea quadrifolia, water shamrock Marsilea unicornis Marsilea vera Marsilea villifolia Salvinia cucullata, Asian watermoss Salvinia natans, floating fern
Schizaeales Lygodium microphyllum Schizaea pusilla
Osmundales Osmunda hugeliana Osmunda regalis, royal fern
Isoetopsida
Isoetes alstonii Isoetes bischlerae Isoetes bolanderi Isoetes boliviensis Isoetes cleefii Isoetes coromandelina Isoetes echinospora, spring quillwort Isoetes engelmannii Isoetes giessii Isoetes howellii Isoetes lacustris, common quillwort Isoetes lechleri Isoetes maritima Isoetes nuttallii Isoetes palmeri Isoetes riparia Isoetes toximontana Isoetes tuckermanii Isoetes welwitschii
Lycopodiopsida
Huperzia cumingii Huperzia dacrydioides Lycopodiella appressa Lycopodiella inundata, marsh clubmoss Selaginella balansae Selaginella denticulata, toothed-leaved clubmoss
Psilotopsida
Ophioglossum azoricum Ophioglossum lusitanicum, least adder's-tongue Ophioglossum nudicaule Ophioglossum reticulatum
Horsetails
Equisetum arvense, field horsetail Equisetum fluviatile, water horsetail Equisetum giganteum, southern giant horsetail Equisetum hyemale, rough horsetail Equisetum palustre, marsh horsetail Equisetum scirpoides, delicate horsetail Equisetum telmateia, great horsetail
Gymnosperms There are 419 species, 34 subspecies, and 66 varieties of gymnosperm assessed as least concern.
Cycads
Species
Bowenia serrulata, Byfield fern Bowenia spectabilis Cycas angulata Cycas arnhemica Cycas basaltica Cycas calcicola Cycas canalis Cycas clivicola Cycas condaoensis Cycas furfuracea Cycas lane-poolei Cycas maconochiei Cycas media Cycas orientis Cycas pruinosa Cycas revoluta, fern palm Cycas thouarsii, Madagascar cycad Cycas xipholepis Dioon mejiae Encephalartos cycadifolius, Winterberg cycad Encephalartos hildebrandtii, Mombasa cycad Encephalartos poggei, Kananga cycad Encephalartos tegulaneus, Kenyan giant cycad Encephalartos turneri, Turner's cycad Encephalartos villosus, poor man's cycad Lepidozamia hopei Lepidozamia peroffskyana Macrozamia communis Macrozamia concinna, Nundle cycad Macrozamia diplomera Macrozamia douglasii Macrozamia dyeri Macrozamia fearnsidei Macrozamia fraseri Macrozamia glaucophylla Macrozamia heteromera Macrozamia johnsonii Macrozamia lucida Macrozamia macdonnellii Macrozamia macleayi Macrozamia miquelii Macrozamia montana Macrozamia mountperriensis Macrozamia polymorpha Macrozamia reducta Macrozamia riedlei
Subspecies
Cycas arnhemica subsp. arnhemica Cycas arnhemica subsp. muninga Cycas arnhemica subsp. natja Cycas clivicola subsp. clivicola Cycas clivicola subsp. lutea Cycas maconochiei subsp. lanata Cycas maconochiei subsp. viridis Cycas media subsp. banksii Cycas media subsp. ensata Cycas media subsp. media Encephalartos tegulaneus subsp. tegulaneus
Conifers
Species
Abies alba, silver fir Abies amabilis, Pacific silver fir Abies balsamea, balsam fir Abies cephalonica, Greek fir Abies chensiensis, Shensi fir Abies concolor, white fir Abies delavayi, Delavay's fir Abies densa, Sikkim fir Abies durangensis, Durango fir Abies fargesii, Farges' fir Abies firma, Momi fir Abies forrestii, Forrest's fir Abies grandis, grand fir Abies lasiocarpa, subalpine fir Abies magnifica, red fir Abies mariesii, Marie's fir Abies nephrolepis, Hinggan fir Abies nordmanniana, Caucasian fir Abies pindrow, pindrow fir Abies procera, noble fir Abies religiosa, sacred fir Abies sachalinensis, Sakhalin fir Abies sibirica, Siberian fir Abies veitchii, Veitch's fir Actinostrobus arenarius, Bruce cypress Actinostrobus pyramidalis, Swan River cypress Agathis robusta, Queensland kauri pine Araucaria bidwillii, bunya pine Araucaria columnaris, Cook's pine Araucaria cunninghamii, hoop pine Callitris canescens, Morrison's cypress pine Callitris columellaris, white cypress-pine Callitris endlicheri, black cypress-pine Callitris macleayana, stringybark pine Callitris muelleri, Illawarra cypress-pine Callitris preissii, Rottnest Island pine Callitris rhomboidea, Port Jackson pine Callitris verrucosa, scrub cypress-pine Calocedrus decurrens, incense cedar Cedrus deodara, deodar cedar Cephalotaxus fortunei, Fortune's yew plum Cephalotaxus harringtonii, Harrington's plum yew Cephalotaxus sinensis, Chinese plum yew Chamaecyparis pisifera, sawara cypress Chamaecyparis thyoides, Atlantic white cedar Cunninghamia lanceolata, Chinese fir Cupressus arizonica, Arizona cypress Cupressus lusitanica, cedar of Goa Cupressus macnabiana, Macnab cypress Cupressus sempervirens, Mediterranean cypress Cupressus torulosa, Himalayan cypress Diselma archeri, Cheshunt pine Juniperus arizonica, Arizona juniper Juniperus ashei, Ashe juniper Juniperus californica, California juniper Juniperus chinensis, Chinese juniper Juniperus coahuilensis Juniperus communis, common juniper Juniperus convallium Juniperus deppeana, alligator juniper Juniperus drupacea, Syrian juniper Juniperus durangensis Juniperus excelsa, Greek juniper Juniperus flaccida, weeping juniper Juniperus foetidissima, stinking juniper Juniperus formosana, Formosan juniper Juniperus horizontalis, Waukegan juniper Juniperus indica, black juniper Juniperus komarovii Juniperus monosperma, one-seed juniper Juniperus monticola Juniperus occidentalis, western juniper Juniperus osteosperma, Utah juniper Juniperus oxycedrus, prickly juniper Juniperus phoenicea, Phoenician juniper Juniperus pinchottii, Pinchot juniper Juniperus procera, African pencil cedar Juniperus procumbens Juniperus przewalskii, Przewalsi juniper Juniperus pseudosabina Juniperus recurva, sacred juniper Juniperus rigida, needle juniper Juniperus sabina, Savin juniper Juniperus saltuaria Juniperus scopulorum, Rocky Mountain juniper Juniperus semiglobosa Juniperus squamata, Nepalese juniper Juniperus thurifera, Spanish juniper Juniperus virginiana, eastern redcedar Keteleeria davidiana Larix decidua, European larch Larix gmelinii, Dahurian larch Larix griffithii, Sikkim larch Larix kaempferi, Japanese larch Larix laricina, tamarack Larix lyallii, alpine larch Larix occidentalis, western larch Larix potaninii, Chinese larch Larix sibirica, Siberian larch Microbiota decussata, Siberian cypress Papuacedrus papuana Picea abies, Norway spruce Picea crassifolia, Qinghai spruce Picea engelmannii, Engelmann spruce Picea glauca, white sprue Picea glehnii, Sakhalin spruce Picea jezoensis, Yezo spruce Picea koraiensis, Korean spruce Picea mariana, black spruce Picea obovata, Siberian spruce Picea orientalis, Oriental spruce Picea pungens, blue spruce Picea rubens, red spruce Picea schrenkiana, Schrenk's spruce Picea sitchensis, Sitka spruce Picea smithiana, Indian spruce Picea spinulosa, Sikkim spruce Picea wilsonii, Wilson spruce Pinus aristata, Colorado bristlecone pine Pinus arizonica, Arizona pine Pinus armandii, Armand's pine Pinus attenuata, knobcone pine Pinus ayacahuite, Mexican white pine Pinus banksiana, jack pine Pinus bhutanica, Bhutan white pine Pinus brutia, Calabrian pine Pinus bungeana, lace-bark pine Pinus canariensis, canary pine Pinus caribaea, Caribbean pine Pinus cembra, Arolla pine Pinus cembroides, Mexican nut pine Pinus clausa, sand pine Pinus contorta, lodgepole pine Pinus cubensis, Cuban pine Pinus densata, Gaoshan pine Pinus densiflora, Japanese red pine Pinus devoniana, Michoacan pine Pinus echinata, shortleaf pine Pinus edulis, Colorado pinyon Pinus elliottii, slash pine Pinus engelmannii, Apache pine Pinus flexilis, limber pine Pinus glabra, spruce pine Pinus gordoniana, Douglas pine Pinus halepensis, Aleppo pine Pinus hartwegii, Hartweg's pine Pinus heldreichii, Heldreich's pine Pinus herrerae, Herrera's pine Pinus hwangshanensis, Huangshan pine Pinus jeffreyi, Jeffrey pine Pinus kesiya, Khasia pine Pinus koraiensis, Korean pine Pinus lambertiana, sugar pine Pinus lawsonii, Lawson's pine Pinus leiophylla, smooth-leaved pine Pinus longaeva, Great Basin bristlecone pine Pinus luchuensis, Luchu pine Pinus luzmariae Pinus massoniana, Masson's pine Pinus maximinoi, thin-leaf pine Pinus monophylla, single leaf pinyon pine Pinus montezumae, Montezuma pine Pinus mugo, Mugo pine Pinus nigra, Austrian pine Pinus oocarpa, egg-cone pine Pinus parviflora, Japanese white pine Pinus patula, jelecote pine Pinus pinaster, maritime pine Pinus pinceana, weeping pinyon pine Pinus pinea, stone pine Pinus ponderosa, ponderosa pine Pinus pringlei, Pringle's pine Pinus pseudostrobus, smooth-bark Mexican pine Pinus pumila, dwarf Siberian pine Pinus pungens, Table Mountain pine Pinus quadrifolia, Parry pinyon Pinus remota, Texas pinyon pine Pinus resinosa, Norway pine Pinus rigida, hard pine Pinus roxburghii, chir pine Pinus sabiniana, gray pine