Flora of the Houtman Abrolhos

This is a list of the terrestrial flora of the Houtman Abrolhos. Only vascular plants are listed — there have been some collections of mosses, liverworts and lichens from the Houtman Abrolhos, but no information has been published on these non-vascular groups.[1]

The distribution of each species within each island group is provided. A list of islands is provided for species that occur on fewer than ten islands in a group; for species that occur on ten or more islands in a group, an island count is provided. Islands without a formally gazetted name are referred to by informal names, given in quotation marks.

A grey background indicates a naturalised species.

Scientific name Common name Distribution Remarks Image
Wallabi Group
(45 islands)		Easter Group
(34 islands)		Pelsaert Group
(41 islands)
Carpobrotus sp. Rat I.
Carpobrotus virescens Coastal Pigface13 islands25 islands23 islands
Disphyma crassifolium subsp. clavellatum Round-leaved PigfacePigeon I.Leo I., Rat I.
Mesembryanthemum crystallinum Iceplant40 islands18 islands30 islandsNaturalised
Sesuvium portulacastrum Campbell I.
Tetragonia decumbens Sea SpinachCrake I., Keru I., White I., Wooded I.Naturalised
Ptilotus divaricatus Climbing Mulla MullaEast Wallabi I.
Ptilotus eriotrichus East Wallabi I., West Wallabi I.
Ptilotus gaudichaudii East Wallabi I.Serventy I.
Ptilotus obovatus Cotton BushEast Wallabi I.
Ptilotus villosiflorus West Wallabi I.
Thysanotus patersonii East Wallabi I., North I., Pigeon I., Seagull I., West Wallabi I.
Apium annuum East Wallabi I., West Wallabi I.Alexander I., Campbell I., Serventy I.
Apium prostratum Sea CeleryTattler I.Middle I.
Daucus glochidiatus Australian CarrotEast Wallabi I., North I., Pigeon I., West Wallabi I.Campbell I., Keru I., White I.Middle I.
Hydrocotyle diantha East Wallabi I., West Wallabi I.Rat I.Basile I., Middle I.
Petroselinum crispum ParsleyLittle Rat I., Rat I., Roma I.Naturalised
Trachymene pilosa Native ParsnipEast Wallabi I.
Alyxia buxifolia Dysentery BushEast Wallabi I., Seagull I. and West Wallabi I.
Sarcostemma viminale subsp. australe "Eagle Point Islet", East Wallabi I., Oystercatcher I., Pigeon I., Seagull I. and West Wallabi I.Basile I., Middle I.
Bulbine semibarbata Leek Lily"Eagle Point Islet", East Wallabi I., Little Pigeon I., North I., Pigeon I. and West Wallabi I.Rat I.Middle I., Pelsaert I.
Actinobole condensatum East Wallabi I., North I., West Wallabi I.
Actites megalocarpa Dune ThistleLittle Pigeon I., Long I., Oystercatcher I., Pigeon I., Seagull I.Pelsaert I.
Angianthus tomentosus Camel-grassEast Wallabi I.
Brachyscome ciliaris East Wallabi I., North I., Pigeon I.Little Rat I.
Brachyscome iberidifolia East Wallabi I.
Calocephalus aervoides Woolly Beauty-headsEast Wallabi I., West Wallabi I.Rated "Priority Three - Poorly Known Taxa" in the Department of Environment and Conservation's Declared Rare and Priority Flora List.[2]
Chthonocephalus tomentellus West Wallabi I.Rated "Priority Two - Poorly Known Taxa" in the Department of Environment and Conservation's Declared Rare and Priority Flora List.[3]
Conyza bonariensis Flaxleaf FleabaneLittle Pigeon I., Pigeon I.Bushby I., Little Rat I., Rat I., Roma I.Naturalised
Conyza sumatrensis Tall FleabaneRat I.Naturalised. Harvey et al. (2001) lists C. albida, but this is now a taxonomic synonym of C. sumatrensis.[4]
Erigeron karvinskianus Gun I., Murray I.Naturalised
Euchiton sphaericus East Wallabi I., North I.Rat I.
Gnaphalium indutum Tiny CudweedEast Wallabi I.Leo I.
Helichrysum luteoalbum Jersey CudweedEast Wallabi I., North I., Turnstone I., West Wallabi I.Little Rat I., Rat I.Naturalised. Harvey et al. (2001) lists Pseudognaphalium luteoalbum, but this is now a nomenclatural synonym of Helichrysum luteoalbum.[5]
Hypochaeris glabra Smooth CatsearBasile I.Naturalised
Lactuca saligna Wild LettucePigeon I.Naturalised
Olearia axillaris Coastal DaisybushEastern I., East Wallabi I., Long I., North I., Pigeon I., Turnstone I., West Wallabi I.Campbell I.
Podotheca angustifolia Sticky LongheadsNorth I., West Wallabi I.
Reichardia tingitana False SowthistleCampbell I., Rat I.Basile I., Middle I.Naturalised
Senecio glossanthus Slender GroundselEast Wallabi I., North I., West Wallabi I.
Senecio pinnatifolius 23 islands17 islands16 islandsHarvey et al. (2001) lists S. lautus but this name has been misapplied in Western Australia to S. pinnatifolius.[6]
Sonchus oleraceus Common Sowthistle20 islands19 islands16 islandsNaturalised. Harvey et al. (2001) lists both S. oleraceus and S. tenerrimus on four islands, and S. tenerrimus alone on another. However, the latter name is now considered a misapplication against the former in Western Australia,[7] so here the entries for these names have been pooled.
Urospermum picroides False Hawkbit10 islands10 islandsBurnett Rock, Burton I., Gun I., Post Office I., Uncle Margie I.Naturalised
Ursinia anthemoides UrsiniaAlexander I., Leo I., Serventy I., White I.Burnett Rock, Burton I.Naturalised.
Vittadinia cuneata var. cuneata Woolly VittadiniaAkerstrom I., Barge Rock, East Wallabi I., Marinula I., Seagull I., Turnstone I.
Vittadinia sp. East Wallabi I.
Avicennia marina White MangroveAkerstrom I., "East Mangrove I.", Marinula I., Oystercatcher I., Seagull I., Tattler I., Turnstone I., West Wallabi I.Alexander I., Campbell I., Keru I., Little Rat I., "Little Stokes I.", Morley I., Serventy I., Suomi I., Wooded I.14 islands
Cynoglossum australe Australian Hound's-tongueEast Wallabi I., West Wallabi I.Harvey et al. (2001) lists this species, but according to FloraBase it does not occur in Western Australia.[8]
Echium plantagineum Paterson's CurseEast Wallabi I.Naturalised; classed as a noxious weed.[9]
Trichodesma zeylanicum Camel BushNorth I.
Brassica rapa Beacon I.Naturalised
Cakile maritima Sea Rocket10 islands13 islands12 islandsNaturalised
Hornungia procumbens Oval Purse14 islandsBynoe I., Leo I., Morley I., Serventy I.Burton I., Pelsaert I.Naturalised. Harvey et al. (2001) lists Hornungia procumbens on 13 islands, and Hymenolobus procumbens on another, but the latter name is now considered a synonym of the former.[10]
Lepidium lyratogynum Eastern I.Bynoe I., Leo I., Little North I., White I.
Lepidium pseudoruderale Beacon I., Dakin I., Dick I., Eastern I., Saville-Kent I., Seal I.Burnett Rock, Burton I., Coronation I., Jackson I., "Little Jackson I.", Newman I., Pelsaert I., Post Office I., Square I.
Lepidium puberulum Eastern I., "First Sister Islet"10 islandsRated "Priority Four — Rare Taxa" in the Department of Environment and Conservation's system of Declared Rare and Priority Flora List.[11]
Raphanus raphanistrum Wild radishPigeon I.Alexander I., Little Rat I., Rat I., Serventy I.Basile I., Gun I., Murray I., Pelsaert I., Post Office I.Naturalised
Raphanus sativus RadishAlexander I.Basile I., Burnett RockNaturalised
Sisymbrium irio London RocketSuomi I.Naturalised
Sisymbrium orientale Indian Hedge MustardBeacon I.Little Rat I., Rat I.Burnett RockNaturalised
Opuntia stricta Common Prickly PearRat I.Basile I.Naturalised
Wahlenbergia gracilis Rat I.
Wahlenbergia multicaulis Rat I.
Capparis spinosa Coastal Caper"Eagle Point Islet", East Wallabi I., Little Pigeon I., Oystercatcher I., Pigeon I., Seagull I., Tattler I., Turnstone I., West Wallabi I.
Cerastium glomeratum Mouse Ear ChickweedEight I., Three I.Naturalised
Petrorhagia dubia Velvet PinkRat I.Naturalised. Harvey et al. (2001) lists P. velutina, but this is now a taxonomic synonym of P. dubia.[12]
Polycarpon tetraphyllum Fourleaf AllseedEast Wallabi I., Little Pigeon I., Pigeon I.Little Roma I.Basile I., Jackson I.Naturalised
Sagina apetala Annual PearlwortEast Wallabi I.Naturalised
Silene gallica French CatchflyWhite I.Naturalised
Silene nocturna Mediterranean CatchflyAlexander I., Bynoe I., Little Rat I., Morley I., Serventy I.Naturalised
Spergularia diandra Lesser Sand SpurryGun I.Naturalised
Spergularia rubra Sand Spurry12 islandsLittle Rat I., Roma I.Pelsaert I., Three I.Naturalised
Spergularia sp. 5 Leeman Rat I.Harvey et al. (2001) lists S. nesophila, but this is an unpublished manuscript name, which is considered a nomenclatural synonym of the above.[13]
Stellaria media ChickweedWest Wallabi I.Naturalised
Stackhousia sp. West Wallabi I.Harvey et al. (2001) lists this under Stackhousiaceae, but it is now generally treated under Celastraceae.[14]
Stackhousia sp. East Wallabi I., North I., West Wallabi I.Harvey et al. (2001) lists this as Stackhousia viminea, but this name has been misapplied in Western Australia against three species: S. clementii, S. muricata and S. intermedia.[15] Harvey et al. (2001) treats Stackhousia under Stackhousiaceae, but it is now generally treated under Celastraceae.[14]
Tripterococcus brunonis East Wallabi I.Harvey et al. (2001) lists this under Stackhousiaceae, but it is now generally treated under Celastraceae.[14]
Atriplex amnicola Swamp SaltbushGun I., Murray I., Pelsaert I.
Atriplex bunburyana Silver SaltbushRat I.
Atriplex cinerea Grey Saltbush27 islands21 islands22 islands
Atriplex paludosa Marsh SaltbushLittle Pigeon I., Long I., Mangrove I., North I., Pelican I., Pigeon I., Tattler I., West Wallabi I.
Atriplex paludosa subsp. baudinii Rat I.
Atriplex vesicaria subsp. variabilis Bladder SaltbushSeagull I.
Atriplex sp. Saltbush17 islands10 islands18 islands
Chenopodium album Fat HenRat I.Naturalised
Chenopodium melanocarpum Black CrumbweedEast Wallabi I.
Chenopodium murale Nettle-leaf GoosefootBeacon I., North I., Pelican I., West Wallabi I.Alexander I., Joe Smith I., "Landscope I.", "Nitraria I.", Rat I., Wooded I.Burton I., Gun I., "Little Jackson I.", Pelsaert I., Square I., Uncle Margie I.Naturalised
Chenopodium nitrariaceum Nitre GoosefootEast Wallabi I., West Wallabi I.
Dysphania plantaginella East Wallabi I.
Enchylaena tomentosa Barrier Saltbush26 islands11 islands17 islands
Rhagodia baccata Berry SaltbushAkerstrom I., East Wallabi I., North I., Oystercatcher I., Pigeon I., Seagull I., Tattler I., Turnstone I., West Wallabi I.
Rhagodia latifolia Akerstrom I., "Eagle Point Islet", Little Pigeon I., North I., Pigeon I.
Rhagodia preissii subsp. obovata Little Rat I., Rat I.
Rhagodia sp. Rat I.
Salsola kali Prickly SaltwortDick I., Eastern I., East Wallabi I., Long I., North I., Seal I., Third Sister, West Wallabi I.Bynoe I., Campbell I., Crake I., Leo I., Morley I., Rat I.Basile I., Coronation I., Pelsaert I., Stick I.Naturalised
Sarcocornia quinqueflora Beaded Samphire17 islands19 islands15 islands
Suaeda australis Seablite11 islands"Nitraria I.", Tapani I., Wooded I.Newman I., Pelsaert I.
Tecticornia arbuscula East Wallabi I., North I., Pigeon I., West Wallabi I.Gun I., Middle I., Murray I., Pelsaert I.Harvey et al. (2001) listed Sclerostegia arbuscula, but all Sclerostegia were transferred into Tecticornia in 2007.[16]
Tecticornia halocnemoides Shrubby SamphireAkerstrom I., Alcatraz I., Barge Rock, East Wallabi I., North I., Pigeon I., Shag Rock, West Wallabi I.13 islands25 islandsHarvey et al. (2001) listed Halosarcia halocnemoides, but all Halosarcia were transferred into Tecticornia in 2007.[16]
Tecticornia lepidosperma subsp. bidens Akerstrom I.Little Rat I., Rat I.Lagoon I., Pelsaert I.Harvey et al. (2001) listed Halosarcia indica subsp. bidens, but all Halosarcia were transferred into Tecticornia in 2007.[16]
Tecticornia sp. SamphireWest Wallabi I.Harvey et al. (2001) listed Halosarcia sp., but all Halosarcia were transferred to Tecticornia in 2007.[16]
Threlkeldia diffusa Coast Bonefruit33 islands19 islands20 islands
Wurmbea monantha East Wallabi I., North I., West Wallabi I.Alexander I., Serventy I.
Ipomoea cairica Little Rat I.Naturalised
Bryophyllum delagoense Mother of MillionsPigeon I.Rat I.Naturalised. In 2000 this poisonous weed was found to have colonised over half of Rat and Pigeon Islands.[17]
Crassula colorata Dense StonecropDick I., Eastern I., East Wallabi I., Long I., North I., Tattler I., West Wallabi I.10 islandsBasile I., Burton I., Middle I., Pelsaert I., Stick I.
Crassula exserta Bynoe I., Campbell I., Leo I., White I.
Cotyledon orbiculata Dick I., Eastern I., Pigeon I., West Wallabi I.
Cucurbita pepo Rat I.
Aphanopetalum clematideum East Wallabi I.
Ficinia nodosa Knotted Club RushNorth I.Harvey et al. (2001) listed Isolepis nodosa, but this species has since been transferred into Ficinia.[18]
Isolepis marginata Coarse ClubrushEast Wallabi I., West Wallabi I.Naturalised
Acanthocarpus preissii "Eagle Point Islet", East Wallabi I., Little Pigeon I., North I., Oystercatcher I., Pigeon I., Seagull I., Tattler I., West Wallabi I.
Hibbertia racemosa Stalked Guinea FlowerEast Wallabi I., West Wallabi I.
Leucopogon insularis East Wallabi I., West Wallabi I.
Beyeria viscosa PinkwoodEast Wallabi I., Oystercatcher I., West Wallabi I.
Euphorbia boophthona Gascoyne SpurgePigeon I.
Euphorbia drummondii Caustic WeedEast Wallabi I., West Wallabi I.Little Rat I., Rat I.Middle I.
Euphorbia tannensis "Eagle Point Islet", Little Pigeon I., North I., Oystercatcher I., Pigeon I., Seagull I., Turnstone I.Middle I.
Euphorbia terracina Geraldton Carnation WeedPigeon I.Little Rat I., Rat I.Naturalised
Phyllanthus calycinus False BoroniaEast Wallabi I., West Wallabi I.
Frankenia pauciflora Seaheath11 islandsBushby I., Campbell I., Little Rat I., Rat I.Davis I., Gun I., Middle I., Murray I., Pelsaert I., Sweet I.
Centaurium erythraea Common CentauryBushby I., Little Rat I.Naturalised
Schenkia australis East Wallabi I., North I., Pigeon I., Tattler I., Turnstone I., West Wallabi I.Basile I., Gun I., Pelsaert I.Naturalised. Harvey et al. (2001) lists this as Centaurium spicatum, but this species has been transferred into Schenkia, and the Australian specimens segregated into a new species as S. australis. Harvey et al. (2001) also lists C. maritimum on East Wallabi Island, but this name has been misapplied for C. spicatum in Australia.[19]
Erodium cicutarium Common StorksbillBarge Rock, East Wallabi I., Long I., North I., Pigeon I., West Wallabi I.Little Rat I., Rat I.Middle I., Pelsaert I., Square I.Naturalised
Erodium cygnorum Blue HeronsbillEast Wallabi I., North I., Pigeon I.
Pelargonium littorale East Wallabi I.
Pelargonium zonale Rat I.Naturalised. Harvey et al. (2001) lists this species, but FloraBase has no record of it occurring in Western Australia.[20]
Scaevola crassifolia Thick-leaved Fan-flowerEast Wallabi I., North I., Seagull I., West Wallabi I.Campbell I., Rat I., Suomi I.Pelsaert I.
Haloragis trigonocarpa East Wallabi I., Pigeon I.
Juncus bufonius Toad RushEast Wallabi I., North I., Pigeon I., West Wallabi I.Naturalised
Triglochin centrocarpa Dick I., Pigeon I., West Wallabi I.Gun I., Middle I., Pelsaert I., Three I.
Triglochin mucronata North I., West Wallabi I.
Triglochin muelleri East Wallabi I.
Triglochin trichophora Barge Rock, East Wallabi I., North I.Keru I., Rat I., Serventy I.
Westringia dampieri East Wallabi I., First Sister, West Wallabi I.
Aloe sp. Little Pigeon I.Naturalised
Phyllangium paradoxum West Wallabi I.
Lavatera sp. "Shearwater Islet"
Malva preissiana Australian Hollyhock21 islands15 islands12 islandsHarvey et al. (2001) lists this as Lavatera plebeia, but this is now a synonym of M. preissiana.[21]
Malva linnaei Cretan MallowLittle North I., White I.Naturalised according to FloraBase, though not according to Harvey et al. (2001).[22] The latter source lists this as Lavatera cretica, but this is now a synonym of M. linnaei.[23]
Malva parviflora MarshmallowEast Wallabi I., North I., Pigeon I., West Wallabi I.Rat I.Newman I., Sid Liddon I.Naturalised
Sida spodochroma East Wallabi I.
Acacia didyma East Wallabi I.
Eremophila glabra Tar BushEast Wallabi I., West Wallabi I.Basile I., Middle I.
Eremophila deserti East Wallabi I.
Myoporum insulare Blueberry Tree27 islands22 islands17 islands
Eucalyptus oraria OoragmandeeEast Wallabi I.
Epilobium billardiereanum Glabrous Willow HerbEast Wallabi I.
Orobanche minor Lesser BroomrapeEast Wallabi I.Naturalised
Microtis media Tall Mignonette OrchidEast Wallabi I.
Microtis sp. East Wallabi I.
Oxalis corniculata Yellow Wood SorrelEast Wallabi I., West Wallabi I.Naturalised
Bossiaea spinescens East Wallabi I.
Medicago polymorpha Burr MedicLittle Pigeon I., Pigeon I.Little Rat I., Rat I., Suomi I.Pelsaert I.Naturalised
Medicago sp. Rat I.Naturalised
Melilotus indicus Beacon I., North I.Bushby I., Little Rat I., Rat I.Basile I., Gun I., Pelsaert I., Post Office I.Naturalised
Mirbelia ramulosa East Wallabi I.
Dianella revoluta Blueberry Lily"Eagle Point Islet", East Wallabi I., Oystercatcher I., Pigeon I., Seagull I., Tattler I., West Wallabi I.
Pittosporum phillyreoides Weeping Pittosporum10 islandsMiddle I.
Plantago coronopus Buckshorn PlantainLittle Rat I.
Plantago debilis East Wallabi I., North I., Pigeon I., West Wallabi I.Middle I.
Muellerolimon salicorniaceum 10 islandsLittle Rat I., Rat I.Middle I.
Austrodanthonia caespitosa East Wallabi I., North I.
Austrostipa crinita North I.
Austrostipa elegantissima East Wallabi I., Long I., Oystercatcher I., Pigeon I., Seagull I., Turnstone I., West Wallabi I.Middle I.
Austrostipa flavescens Akerstrom I., Oystercatcher I., Seagull I., Tattler I.
Austrostipa variabilis East Wallabi I., North I., Tattler I., West Wallabi I.Rat I.
Avena barbata Bearded OatLittle Pigeon I., Pigeon I.Roma I., Wooded I.Basile I., Pelsaert I.Naturalised
Avena fatua Wild OatNorth I.Alexander I., Little Rat I., Rat I., Serventy I., Suomi I., Wooded I.Basile I., Burnett Rock, Burton I., Pelsaert I., Uncle Margie I.Naturalised
Avena sp. Beacon I., Tattler I.Bushby I.Naturalised
Bromus arenarius Sand Brome13 islands13 islandsBurnett Rock, Burton I., Coronation I. Newman I., Pelsaert I., Post Office I., Stick I.
Bromus diandrus Great BromeBeacon I., Little Pigeon I., Long I., North I., Pigeon I., Seagull I., Turnstone I.Alexander I., Campbell I., Gilbert I., Leo I., Wooded I.Basile I., Burton I., Eight I., Three I.Naturalised
Bromus hordeaceus Soft Brome11 islandsMiddle I., Pelsaert I., Square I.Naturalised
Bromus japonicus var. vestitus Seal I.Naturalised
Bromus madritensis Madrid BromeNorth I.Naturalised
Bromus rubens Red BromeBasile I., Burnett Rock, Uncle Margie I.Naturalised
Bromus sp. Campbell I.Gun I., Murray I., One I., Sweet I.Naturalised
Cynodon dactylon CouchEast Wallabi I., North I., Pigeon I.Rat I., Wooded I.Naturalised
Cynodon sp. Rat I.
Ehrharta brevifolia Annual Veldt GrassEast Wallabi I.Pelsaert I.Naturalised
Ehrharta longiflora Annual Veldt GrassBarge Rock, Beacon I., Little Pigeon I., Pigeon I., Seagull I., Tattler I.12 islandsBasile Rock, Burton I., Eight I., Gun I., Jackson I., Newman I., Pelsaert I., Uncle Margie I.Naturalised
Eragrostis dielsii Mallee LovegrassAkerstrom I., East Wallabi I., Little Pigeon I., North I., Pigeon I., Turnstone I.Little Rat I., Rat I.Pelsaert I.
Hordeum murinum subsp. leporinum Barley GrassLittle Pigeon I., North I., Pigeon I.Alexander IslandBasile I.Naturalised; in Western Australia this is treated at species rank as Hordeum leporinum.[24]
Lachnagrostis filiformis Blown GrassEast Wallabi I., West Wallabi I.Harvey et al. (2001) lists this as Agrostis avenacea, but this is now a synonym of L. filiformis.[25]
Lolium multiflorum Italian RyegrassWest Wallabi I.Naturalised
Lolium perenne Perennial RyegrassWest Wallabi I.Basile I.Naturalised
Lolium rigidum Wimmera RyegrassAlcatraz I., Little Pigeon I.Pelsaert I.Naturalised
Lolium temulentum DrakeCampbell I., Leo I., Rat I.Stick I.Naturalised
Parapholis incurva Coast BarbgrassNorth I.Bynoe I., Campbell I., Keru I., Leo I., Morley I., Roma I.Uncle Margie I.Naturalised
Pennisetum clandestinum Kikuyu GrassLittle Rat I.Naturalised
Phalaris canariensis Canary GrassPost Office I.Naturalised
Phalaris minor Lesser Canary GrassNorth I., Pigeon I., East Wallabi I.Alexander I., Morley I., Serventy I., Suomi I.Basile I., Burnett Rock, Burton I., Post Office I., Uncle Margie I.Naturalised
Phleum pratense Timothy"Gun Islet"Naturalised
Poa annua Winter GrassBeacon I., East Wallabi I.Naturalised
Poa poiformis Coastal PoaEast Wallabi I.
Polypogon monspeliensis Annual BeardgrassLittle Pigeon I., Long I., West Wallabi I.Naturalised
Polypogon tenellus East Wallabi I., Pigeon I., West Wallabi I.
Rostraria cristata Little Pigeon I., North I., Pigeon I.Bynoe I., Serventy I.Naturalised
Setaria dielsii Diels' Pigeon Grass16 islands11 islandsBurnett Rock, Burton I., Gun I., Middle I., Newman I., Pelsaert I., Square I., Three I.
Setaria sp. Dick I.
Spinifex longifolius Beach Spinifex15 islands13 islandsBurton I., Coronation I., Hummock I., Middle I., Pelsaert I., Post Office I., Stick I., Uncle Margie I.
Sporobolus virginicus Marine CouchNorth I., Oystercatcher I., Pigeon I., Seagull I., Turnstone I., West Wallabi I.Middle I.
Triticum aestivum WheatNorth I.Naturalised
Vulpia myuros Rat's Tail FescueAkerstrom I., East Wallabi I., Little Pigeon I., North I., Pigeon I., Turnstone I., West Wallabi I.Little Rat I., Rat I., Serventy I.Naturalised
Emex australis DoublegeeLittle Pigeon I., Pigeon I.Rat I.Naturalised
Calandrinia calyptrata Pink PurslaneNorth I.Rotondella I., Uncle Margie I.
Anagallis arvensis PimpernelPigeon I., West Wallabi I.Alexander I., Bushby I., Little Rat I., Rat I., Serventy I.Gun I., Middle I., Pelsaert I.Naturalised
Grevillea argyrophylla Silvery-leaved GrevilleaEast Wallabi I., North I., Pelican I., Saville-Kent I., West Wallabi I.Basile I., Middle I., Murray I.
Ranunculus sessiliflorus Smallflower ButtercupEast Wallabi I.
Spyridium globulosum Basket BushEast Wallabi I., North I., West Wallabi I.
Galium sp. East Wallabi I.Harvey et al. (2001) list this as "Galium migrans" but, according to FloraBase, that species is not present in Western Australia.[26]
Opercularia vaginata Dog WeedEast Wallabi I.
Diplolaena grandiflora Wild Rose"Eagle Point Islet", East Wallabi I., Little Pigeon I., Oystercatcher I., Pigeon I., Seagull I., Tattler I., Turnstone I., West Wallabi I.Little Rat I., Rat I.Gun I.
Exocarpos aphyllus Leafless BallartEast Wallabi I., Little Pigeon I., Long I., Oystercatcher I., Pigeon I., Seagull I., Tattler I., West Wallabi I.
Exocarpos sparteus Broom BallartNorth I., West Wallabi I.
Dodonaea aptera Coast Hop-bushEast Wallabi I., North I., Oystercatcher I., West Wallabi I.
Dodonaea inaequifolia East Wallabi I., Oystercatcher I., West Wallabi I.
Dodonaea viscosa Sticky HopbushSeagull I.
Dischisma arenarium West Wallabi I.Naturalised
Lycium ferocissimum African BoxthornWooded I.Arthur I., Davis I., Eight I., Gun I., Pelsaert I., Seven I., Sid Liddon I., Sweet I., Three I.Naturalised. This has been declared a noxious weed, and an eradication program is in place. Harvey et al. (2001) record the plant on only these ten islands, but in 2007 the Department of Environment and Conservation reported that it had been eradicated from 14 out of 18 islands on which it had previously occurred.[27]
Lycopersicon esculentum TomatoRat I., Roma I.Jackson I., Middle I.Naturalised
Nicotiana glauca Tree TobaccoPigeon I.Naturalised
Nicotiana occidentalis subsp. hesperis Native Tobacco14 islandsAlexander I., Morley I., White I., Wooded I.Middle I., Pelsaert I.
Solanum laciniatum Kangaroo AppleEast Wallabi I.Naturalised
Solanum nigrum Black Berry NightshadeBeacon I., East Wallabi I., Little Pigeon I., Pigeon I., West Wallabi I.Bushby I., Little Rat I., Rat I., Roma I.Eight I., Gun I.Naturalised
Solanum symonii Alcatraz I., Beacon I., East Wallabi I., Oystercatcher I., Seagull I.
Lasiopetalum angustifolium Narrow Leaved LasiopetalumEast Wallabi I.
Tamarix aphylla Athel TreePigeon I., West Wallabi I.Naturalised. Harvey et al. (2001) list this as "Tamarix sp.", but T. aphylla is the only Tamarix species naturalised in Western Australia.[28]
Pimelea microcephala Shrubby Riceflower11 islands
Parietaria cardiostegia Dakin I., Saville-Kent I.Bynoe I., Keru I.Burton I.
Parietaria debilis PellitoryBeacon I., Dakin I., Dick I., Eastern I., East Wallabi I., Long I., North I., Saville-Kent I., West Wallabi I.Alexander I., Bynoe I., Keru I., Leo I., Little North I., Morley I., Rat I., White I.13 islands
Urtica urens Small NettleEast Wallabi I., West Wallabi I.Naturalised
Nitraria billardierei Nitre Bush43 islands30 islands34 islandsThis is the most widespread plant species in the Houtman Abrolhos.
Zygophyllum simile Beacon I., Dakin I., Dick I., East Wallabi I., Long I., North I., Saville-Kent I., West Wallabi I.

References

  1. ↑ Harvey, Judith M. (2001). "A flora and vegetation survey of the islands of the Houtman Abrolhos, Western Australia". CALMScience. 3 (4): 521–623. Data also available in McCrea, Jo, ed. (October 2003). "Inventory of the Land Conservation Values of the Houtman Abrolhos Islands". Department of Fisheries. Government of Western Australia. ISSN 0819-4327. 151. Archived from the original on 2008-07-23. Retrieved 2008-02-02.
  2. ↑ "Calocephalus aervoides (F.Muell.) Benth". FloraBase. Western Australian Government Department of Parks and Wildlife.
  3. ↑ "Chthonocephalus tomentellus (F.Muell.) Benth". FloraBase. Western Australian Government Department of Parks and Wildlife.
  4. ↑ "Name Currency — Conyza albida Spreng". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 2008-02-23.
  5. ↑ "Name Currency — Pseudognaphalium luteoalbum (L.) Hilliard & B.L.Burtt". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 2009-01-09.
  6. ↑ "Name Currency — Senecio lautus Willd". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 2008-02-03.
  7. ↑ "Name Currency — Sonchus tenerrimus L." FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 2008-02-23.
  8. ↑ "Name Currency — Cynoglossum australe R.Br". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 2008-02-03.
  9. ↑ Department of Fisheries (Western Australia) (2007). "Management of the Houtman Abrolhos System: A Draft Review 2007 – 2017" (PDF). Fisheries Management Paper No. 220. Retrieved 2007-12-01.
  10. ↑ "Name Currency — Hymenolobus procumbens (L.) Schinz & Thell". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 2008-02-04.
  11. ↑ "Lepidium puberulum Bunge". FloraBase. Western Australian Government Department of Parks and Wildlife.
  12. ↑ "Name Currency — Petrorhagia velutina (Guss.) P.W.Ball & Heywood". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 2008-02-24.
  13. ↑ "Name Currency — Spergularia nesophila L.G.Adams ms". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 2008-02-24.
  14. 1 2 3 Stevens, P. F. (June 2007). "Celastrales". Angiosperm Phylogeny Website (Version 8). Retrieved 2008-02-22.
  15. ↑ "Name Currency — Stackhousia viminea Sm". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 2009-01-04.
  16. 1 2 3 4 Shepherd, Kelly A.; Wilson, Paul G. (2007). "Incorporation of the Australian genera Halosarcia, Pachycornia, Sclerostegia and Tegicornia into Tecticornia (Salicornioideae, Chenopodiaceae)". Australian Systematic Botany. 20 (4): 319–331. doi:10.1071/SB07002.
  17. ↑ Longman, Vanda; Harvey, Judith M.; Keighery, G. J. "Bryophyllum delagoense (Crassulaceae) : a new weed for Western Australia and a potentially serious problem for the Abrolhos Islands". Nuytsia. 13 (2): 399–401.
  18. ↑ "Name Currency — Isolepis nodosa (Rottb.) R.Br". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 2008-02-05.
  19. ↑ "Name Currency — Centaurium maritimum (L.) Janch". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 2008-02-07.
  20. ↑ "FloraBase Search: genus:Pelargonium species:zonale". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 2008-02-25.
  21. ↑ "Name Currency — Malva australiana M.F.Ray". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 2008-02-09.
  22. ↑ "* Malva linnaei M.F.Ray". FloraBase. Western Australian Government Department of Parks and Wildlife.
  23. ↑ "Name Currency — Malva cretica L." FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 2008-02-25.
  24. ↑ "Hordeum leporinum Link". FloraBase. Western Australian Government Department of Parks and Wildlife.
  25. ↑ "Name Currency — Agrostis avenacea J.F.Gmel". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 2008-02-09.
  26. ↑ "Name Currency — Galium migrans Ehrend. & McGill". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 2010-10-28.
  27. ↑ "African boxthorn eradication close". NatureBase. Department of Environment and Conservation, Western Australia. 2007-07-03. Retrieved 2008-02-27.
  28. ↑ "Search: Genus: Tamarix". FloraBase. Department of Environment and Conservation, Western Australia. Retrieved 2008-02-23.
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