This page's list covers the monocotyledon plants found in Great Britain and Ireland. This clade includes grasses, lilies, orchids, irises and a wide variety of aquatic plants.
Status key: * indicates an introduced species and e indicates an extinct species.
Order Alismatales (alismatids) Family Butomaceae (flowering-rushes) English name Scientific name Status Flowering rush Butomus umbellatus
Family Alismataceae (water-plantains) English name Scientific name Status Arrowhead Sagittaria sagittifolia Duck-potato Sagittaria latifolia * Canadian arrowhead Sagittaria rigida * Narrow-leaved arrowhead Sagittaria subulata * Lesser water-plantain Baldellia ranunculoides Floating water-plantain Luronium natans Water-plantain Alisma plantago-aquatica Narrow-leaved water-plantain Alisma lanceolatum Ribbon-leaved water-plantain Alisma gramineum Starfruit Damasonium alisma Frogbit Hydrocharis morsus-ranae Family Hydrocharitaceae (tape-grasses) English name Scientific name Status Water-soldier Stratiotes aloides Large-flowered waterweed Egeria densa * Canadian waterweed Elodea canadensis * Nuttall's waterweed Elodea nuttallii * South American waterweed Elodea callitrichoides * Esthwaite waterweed Hydrilla verticillata * Curly waterweed Lagarosiphon major * Tapegrass Vallisneria spiralis * Slender naiad Najas flexilis Holly-leaved naiad Najas marina
Family Aponogetonaceae (Cape-pondweeds) English name Scientific name Status Cape-pondweed Aponogeton distachyos * Family Scheuchzeriaceae (Rannoch-rush, pod grass) English name Scientific name Status Rannoch-rush Scheuchzeria palustris
Family Juncaginaceae (arrowgrasses) English name Scientific name Status Marsh arrowgrass Triglochin palustris Sea arrowgrass Triglochin maritimum Family Potamogetonaceae (pondweeds) English name Scientific name Status Opposite-leaved pondweed Groenlandia densa Broad-leaved pondweed Potamogeton natans Bog pondweed Potamogeton polygonifolius Fen pondweed Potamogeton coloratus Loddon pondweed Potamogeton nodosus Shining pondweed Potamogeton lucens Various-leaved pondweed Potamogeton gramineus Red pondweed Potamogeton alpinus Long-stalked pondweed Potamogeton praelongus Perfoliate pondweed Potamogeton perfoliatus American pondweed Potamogeton epihydrus Flat-stalked pondweed Potamogeton friesii Shetland pondweed Potamogeton rutilus Lesser pondweed Potamogeton pusillus Blunt-leaved pondweed Potamogeton obtusifolius Small pondweed Potamogeton berchtoldii Hairlike pondweed Potamogeton trichoides Grass-wrack pondweed Potamogeton compressus Sharp-leaved pondweed Potamogeton acutifolius Curled pondweed Potamogeton crispus Slender-leaved pondweed Potamogeton filiformis Fennel pondweed Potamogeton pectinatus Horned pondweed Zannichellia palustris
Family Ruppiaceae (widgeonweeds, ditch grasses, widgeon grass) English name Scientific name Status Beaked tasselweed Ruppia maritima Spiral tasselweed Ruppia cirrhosa Family Zosteraceae (seagrasses)
English name Scientific name Status Eelgrass Zostera marina Narrow-leaved eelgrass Zostera angustifolia Dwarf eelgrass Zostera noltei
Family Araceae (arum) English name Scientific name Status American skunk-cabbage Lysichiton americanus * Asian skunk-cabbage Lysichiton camtschatcensis * Bog arum Calla palustris * Altar-lily Zantedeschia aethiopica * Lords-and-ladies Arum maculatum Italian lords-and-ladies Arum italicum Dragon arum Dracunculus vulgaris * Mousetailplant Arisarum proboscideum * Greater duckweed Spirodela polyrhiza Fat duckweed Lemna gibba Common duckweed Lemna minor Ivy-leaved duckweed Lemna trisulca Least duckweed Lemna minuta * Rootless duckweed Wolffia arrhiza
Order Acorales (sweet flag)
Family Acoraceae (sweet flag)
English name Scientific name Status Sweet flag Acorus calamus * Slender sweet-flag Acorus gramineus *
Order Commelinales Family Commelinaceae (dayflowers, spiderworts) English name Scientific name Status Spiderwort Tradescantia virginiana * Wandering-Jew Tradescantia fluminensis * Family Pontederiaceae (pickerel-weed family) English name Scientific name Status Pickerelweed Pontederia cordata *
Order Poales Family Eriocaulaceae (pipeworts) English name Scientific name Status Pipewort Eriocaulon aquaticum
Family Juncaceae (rushes)
English name Scientific name Status Heath rush Juncus squarrosus Slender rush Juncus tenuis * Round-fruited rush Juncus compressus Saltmarsh rush Juncus gerardii Three-leaved rush Juncus trifidus Leafy rush Juncus foliosus Toad rush Juncus bufonius Frog rush Juncus ambiguus Broad-leaved rush Juncus planifolius * Dwarf rush Juncus capitatus Blunt-flowered rush Juncus subnodulosus Alpine rush Juncus alpinoarticulatus Jointed rush Juncus articulatus Sharp-flowered rush Juncus acutiflorus Bulbous rush Juncus bulbosus Pigmy rush Juncus pygmaeus Two-flowered rush Juncus biglumis Three-flowered rush Juncus triglumis Chestnut rush Juncus castaneus Sea rush Juncus maritimus Sharp rush Juncus acutus Somerset rush Juncus subulatus * Baltic rush Juncus balticus Thread rush Juncus filiformis Hard rush Juncus inflexus Soft-rush Juncus effusus Compact rush Juncus conglomeratus Great soft-rush Juncus pallidus * Southern wood-rush Luzula forsteri Hairy wood-rush Luzula pilosa Great wood-rush Luzula sylvatica White wood-rush Luzula luzuloides * Field wood-rush Luzula campestris Heath wood-rush Luzula multiflora Fen wood-rush Luzula pallidula Curved wood-rush Luzula arcuata Spiked wood-rush Luzula spicata Family Cyperaceae (sedges) English name Scientific name Status Common cottongrass Eriophorum angustifolium Broad-leaved cottongrass Eriophorum latifolium Slender cottongrass Eriophorum gracile Hare's-tail cottongrass Eriophorum vaginatum Cotton deergrass Trichophorum alpinum e Deergrass Trichophorum cespitosum Common spike-rush Eleocharis palustris Northern spike-rush Eleocharis austriaca Slender spike-rush Eleocharis uniglumis Many-stalked spike-rush Eleocharis multicaulis Few-flowered spike-rush Eleocharis quinqueflora Needle spike-rush Eleocharis acicularis Dwarf spike-rush Eleocharis parvula Sea club-rush Bolboschoenus maritimus Wood club-rush Scirpus sylvaticus Round-headed club-rush Scirpoides holoschoenus Common club-rush Schoenoplectus lacustris Grey club-rush Schoenoplectus tabernaemontani Triangular club-rush Schoenoplectus triqueter Sharp club-rush Schoenoplectus pungens Bristle club-rush Isolepis setacea Slender club-rush Isolepis cernua Floating club-rush Eleogiton fluitans Flat-sedge Blysmus compressus Saltmarsh flat-sedge Blysmus rufus Galingale Cyperus longus Pale galingale Cyperus eragrostis * Brown galingale Cyperus fuscus Black bog-rush Schoenus nigricans Brown bog-rush Schoenus ferrugineus White beak-sedge Rhynchospora alba Brown beak-sedge Rhynchospora fusca Great fen-sedge Cladium mariscus False sedge Kobresia simpliciuscula Greater tussock-sedge Carex paniculata Fibrous tussock-sedge Carex appropinquata Lesser tussock-sedge Carex diandra True fox-sedge Carex vulpina False fox-sedge Carex otrubae American fox-sedge Carex vulpinoidea * Spiked sedge Carex spicata Prickly sedge Carex muricata Grey sedge Carex divulsa Sand sedge Carex arenaria Brown sedge Carex disticha String sedge Carex chordorrhiza Divided sedge Carex divisa Curved sedge Carex maritima Remote sedge Carex remota Oval sedge Carex leporina Star sedge Carex echinata Dioecious sedge Carex dioica Davall's sedge Carex davalliana e Elongated sedge Carex elongata Hare's-foot sedge Carex lachenalii White sedge Carex curta Hairy sedge Carex hirta Slender sedge Carex lasiocarpa Lesser pond-sedge Carex acutiformis Greater pond-sedge Carex riparia Cyperus-like sedge Carex pseudocyperus Bottle sedge Carex rostrata Bladder-sedge Carex vesicaria Russet sedge Carex saxatilis Pendulous sedge Carex pendula Wood-sedge Carex sylvatica Hair sedge Carex capillaris Thin-spiked wood-sedge Carex strigosa Glaucous sedge Carex flacca Carnation sedge Carex panicea Sheathed sedge Carex vaginata Starved wood-sedge Carex depauperata Smooth-stalked sedge Carex laevigata Green-ribbed sedge Carex binervis Distant sedge Carex distans Dotted sedge Carex punctata Long-bracted sedge Carex extensa Tawny sedge Carex hostiana Large yellow-sedge Carex flava Yellow-sedge Carex viridula Pale sedge Carex pallescens Fingered sedge Carex digitata Bird's-foot sedge Carex ornithopoda Dwarf sedge Carex humilis Spring sedge Carex caryophyllea Downy-fruited sedge Carex filiformis Rare spring-sedge Carex ericetorum Soft-leaved sedge Carex montana Pill sedge Carex pilulifera Scorched alpine-sedge Carex atrofusca Bog-sedge Carex limosa Mountain bog-sedge Carex rariflora Tall bog-sedge Carex magellanica Black alpine-sedge Carex atrata Club sedge Carex buxbaumii Close-headed alpine sedge Carex norvegica Estuarine sedge Carex recta Water sedge Carex aquatilis Slender tufted-sedge Carex acuta Three-nerved sedge Carex trinervis e Common sedge Carex nigra Tufted-sedge Carex elata Stiff sedge Carex bigelowii Bristle sedge Carex microglochin Few-flowered sedge Carex pauciflora Rock sedge Carex rupestris Flea sedge Carex pulicaris Family Poaceae (grasses)