Flora of the Houtman Abrolhos

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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)

Aizoaceae
Carpobrotus sp. Rat I.
Carpobrotus virescens Coastal Pigface 13 islands 25 islands 23 islands
Disphyma crassifolium subsp. clavellatum Round-leaved Pigface Pigeon I. Leo I., Rat I. 100px
Mesembryanthemum crystallinum Iceplant 40 islands 18 islands 30 islands Naturalised 100px
Sesuvium portulacastrum Campbell I. 100px
Tetragonia decumbens Sea Spinach Crake I., Keru I., White I., Wooded I. Naturalised

Amaranthaceae
Ptilotus divaricatus Climbing Mulla Mulla East Wallabi I.
Ptilotus eriotrichus East Wallabi I., West Wallabi I.
Ptilotus gaudichaudii East Wallabi I. Serventy I.
Ptilotus obovatus Cotton Bush East Wallabi I.
Ptilotus villosiflorus West Wallabi I.

Anthericaceae
Thysanotus patersonii East Wallabi I., North I., Pigeon I., Seagull I., West Wallabi I. 100px

Apiaceae
Apium annuum East Wallabi I., West Wallabi I. Alexander I., Campbell I., Serventy I.
Apium prostratum Sea Celery Tattler I. Middle I. 100px
Daucus glochidiatus Australian Carrot East 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 Parsley Little Rat I., Rat I., Roma I. Naturalised Parsley Curled.jpg
Trachymene pilosa Native Parsnip East Wallabi I.

Apocynaceae
Alyxia buxifolia Dysentery Bush East Wallabi I., Seagull I. and West Wallabi I. Alyxia-buxifolia.web.jpg

Asclepiadaceae
Sarcostemma viminale subsp. australe "Eagle Point Islet", East Wallabi I., Oystercatcher I., Pigeon I., Seagull I. and West Wallabi I. Basile I., Middle I.

Asphodelaceae
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.

Asteraceae
Actinobole condensatum East Wallabi I., North I., West Wallabi I.
Actites megalocarpa Dune Thistle Little Pigeon I., Long I., Oystercatcher I., Pigeon I., Seagull I. Pelsaert I.
Angianthus tomentosus Camel-grass East Wallabi I.
Brachyscome ciliaris East Wallabi I., North I., Pigeon I. Little Rat I.
Brachyscome iberidifolia East Wallabi I. 100px
Calocephalus aervoides Woolly Beauty-heads East 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 Fleabane Little Pigeon I., Pigeon I. Bushby I., Little Rat I., Rat I., Roma I. Naturalised 100px
Conyza sumatrensis Tall Fleabane Rat I. Naturalised. Harvey et al. (2001) lists C. albida, but this is now a taxonomic synonym of C. sumatrensis.[4] 100px
Erigeron karvinskianus Gun I., Murray I. Naturalised 100px
Euchiton sphaericus East Wallabi I., North I. Rat I. 100px
Gnaphalium indutum Tiny Cudweed East Wallabi I. Leo I.
Helichrysum luteoalbum Jersey Cudweed East 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] 100px
Hypochaeris glabra Smooth Catsear Basile I. Naturalised 100px
Lactuca saligna Wild Lettuce Pigeon I. Naturalised 100px
Olearia axillaris Coastal Daisybush Eastern I., East Wallabi I., Long I., North I., Pigeon I., Turnstone I., West Wallabi I. Campbell I. 100px
Podotheca angustifolia Sticky Longheads North I., West Wallabi I.
Reichardia tingitana False Sowthistle Campbell I., Rat I. Basile I., Middle I. Naturalised 100px
Senecio glossanthus Slender Groundsel East Wallabi I., North I., West Wallabi I.
Senecio pinnatifolius 23 islands 17 islands 16 islands Harvey et al. (2001) lists S. lautus but this name has been misapplied in Western Australia to S. pinnatifolius.[6]
Sonchus oleraceus Common Sowthistle 20 islands 19 islands 16 islands Naturalised. 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. 100px
Urospermum picroides False Hawkbit 10 islands 10 islands Burnett Rock, Burton I., Gun I., Post Office I., Uncle Margie I. Naturalised 100px
Ursinia anthemoides Ursinia Alexander I., Leo I., Serventy I., White I. Burnett Rock, Burton I. Naturalised.
Vittadinia cuneata var. cuneata Woolly Vittadinia Akerstrom I., Barge Rock, East Wallabi I., Marinula I., Seagull I., Turnstone I.
Vittadinia sp. East Wallabi I.

Avicenniaceae
Avicennia marina White Mangrove Akerstrom 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 100px

Boraginaceae
Cynoglossum australe Australian Hound's-tongue East 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 Curse East Wallabi I. Naturalised; classed as a noxious weed.[9] 100px
Trichodesma zeylanicum Camel Bush North I. 100px

Brassicaceae
Brassica rapa Beacon I. Naturalised Brassica rapa plant.jpg
Cakile maritima Sea Rocket 10 islands 13 islands 12 islands Naturalised 100px
Hornungia procumbens Oval Purse 14 islands Bynoe 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 islands Rated "Priority Four — Rare Taxa" in the Department of Environment and Conservation's system of Declared Rare and Priority Flora List.[11]
Raphanus raphanistrum Wild radish Pigeon I. Alexander I., Little Rat I., Rat I., Serventy I. Basile I., Gun I., Murray I., Pelsaert I., Post Office I. Naturalised 100px
Raphanus sativus Radish Alexander I. Basile I., Burnett Rock Naturalised Radieschen.jpg
Sisymbrium irio London Rocket Suomi I. Naturalised 100px
Sisymbrium orientale Indian Hedge Mustard Beacon I. Little Rat I., Rat I. Burnett Rock Naturalised 100px

Cactaceae
Opuntia stricta Common Prickly Pear Rat I. Basile I. Naturalised 100px

Campanulaceae
Wahlenbergia gracilis Rat I. 100px
Wahlenbergia multicaulis Rat I.

Capparaceae
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. Capparis zoharyi 4.jpg

Caryophyllaceae
Cerastium glomeratum Mouse Ear Chickweed Eight I., Three I. Naturalised 100px
Petrorhagia dubia Velvet Pink Rat I. Naturalised. Harvey et al. (2001) lists P. velutina, but this is now a taxonomic synonym of P. dubia.[12] 100px
Polycarpon tetraphyllum Fourleaf Allseed East Wallabi I., Little Pigeon I., Pigeon I. Little Roma I. Basile I., Jackson I. Naturalised 100px
Sagina apetala Annual Pearlwort East Wallabi I. Naturalised
Silene gallica French Catchfly White I. Naturalised 100px
Silene nocturna Mediterranean Catchfly Alexander I., Bynoe I., Little Rat I., Morley I., Serventy I. Naturalised
Spergularia diandra Lesser Sand Spurry Gun I. Naturalised
Spergularia rubra Sand Spurry 12 islands Little Rat I., Roma I. Pelsaert I., Three I. Naturalised 100px
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 Chickweed West Wallabi I. Naturalised 100px

Celastraceae
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]

Chenopodiaceae
Atriplex amnicola Swamp Saltbush Gun I., Murray I., Pelsaert I. 100px
Atriplex bunburyana Silver Saltbush Rat I.
Atriplex cinerea Grey Saltbush 27 islands 21 islands 22 islands 100px
Atriplex paludosa Marsh Saltbush Little Pigeon I., Long I., Mangrove I., North I., Pelican I., Pigeon I., Tattler I., West Wallabi I. 100px
Atriplex paludosa subsp. baudinii Rat I.
Atriplex vesicaria subsp. variabilis Bladder Saltbush Seagull I.
Atriplex sp. Saltbush 17 islands 10 islands 18 islands
Chenopodium album Fat Hen Rat I. Naturalised 100px
Chenopodium melanocarpum Black Crumbweed East Wallabi I.
Chenopodium murale Nettle-leaf Goosefoot Beacon 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 100px
Chenopodium nitrariaceum Nitre Goosefoot East Wallabi I., West Wallabi I.
Dysphania plantaginella East Wallabi I.
Enchylaena tomentosa Barrier Saltbush 26 islands 11 islands 17 islands
Rhagodia baccata Berry Saltbush Akerstrom 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 Saltwort Dick 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 100px
Sarcocornia quinqueflora Beaded Samphire 17 islands 19 islands 15 islands 100px
Suaeda australis Seablite 11 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] 100px
Tecticornia halocnemoides Shrubby Samphire Akerstrom I., Alcatraz I., Barge Rock, East Wallabi I., North I., Pigeon I., Shag Rock, West Wallabi I. 13 islands 25 islands Harvey 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. Samphire West Wallabi I. Harvey et al. (2001) listed Halosarcia sp., but all Halosarcia were transferred to Tecticornia in 2007.[16]
Threlkeldia diffusa Coast Bonefruit 33 islands 19 islands 20 islands 100px

Colchicaceae
Wurmbea monantha East Wallabi I., North I., West Wallabi I. Alexander I., Serventy I.

Convolvulaceae
Ipomoea cairica Little Rat I. Naturalised 100px

Crassulaceae
Bryophyllum delagoense Mother of Millions Pigeon I. Rat I. Naturalised. In 2000 this poisonous weed was found to have colonised over half of Rat and Pigeon Islands.[17] 100px
Crassula colorata Dense Stonecrop Dick I., Eastern I., East Wallabi I., Long I., North I., Tattler I., West Wallabi I. 10 islands Basile 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. 100px

Cucurbitaceae
Cucurbita pepo Rat I. 100px

Cunoniaceae
Aphanopetalum clematideum East Wallabi I.

Cyperaceae
Ficinia nodosa Knotted Club Rush North I. Harvey et al. (2001) listed Isolepis nodosa, but this species has since been transferred into Ficinia.[18] 100px
Isolepis marginata Coarse Clubrush East Wallabi I., West Wallabi I. Naturalised

Dasypogonaceae
Acanthocarpus preissii "Eagle Point Islet", East Wallabi I., Little Pigeon I., North I., Oystercatcher I., Pigeon I., Seagull I., Tattler I., West Wallabi I. 100px

Dilleniaceae
Hibbertia racemosa Stalked Guinea Flower East Wallabi I., West Wallabi I.

Epacridaceae
Leucopogon insularis East Wallabi I., West Wallabi I.

Euphorbiaceae
Beyeria viscosa Pinkwood East Wallabi I., Oystercatcher I., West Wallabi I.
Euphorbia boophthona Gascoyne Spurge Pigeon I.
Euphorbia drummondii Caustic Weed East 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 Weed Pigeon I. Little Rat I., Rat I. Naturalised
Phyllanthus calycinus False Boronia East Wallabi I., West Wallabi I.

Frankeniaceae
Frankenia pauciflora Seaheath 11 islands Bushby I., Campbell I., Little Rat I., Rat I. Davis I., Gun I., Middle I., Murray I., Pelsaert I., Sweet I.

Gentianaceae
Centaurium erythraea Common Centaury Bushby I., Little Rat I. Naturalised 100px
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]

Geraniaceae
Erodium cicutarium Common Storksbill Barge 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 100px
Erodium cygnorum Blue Heronsbill East 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]

Goodeniaceae
Scaevola crassifolia Thick-leaved Fan-flower East Wallabi I., North I., Seagull I., West Wallabi I. Campbell I., Rat I., Suomi I. Pelsaert I. 100px

Haloragaceae
Haloragis trigonocarpa East Wallabi I., Pigeon I.

Juncaceae
Juncus bufonius Toad Rush East Wallabi I., North I., Pigeon I., West Wallabi I. Naturalised Juncus bufonius.jpeg

Juncaginaceae
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.

Lamiaceae
Westringia dampieri East Wallabi I., First Sister, West Wallabi I.

Liliaceae
Aloe sp. Little Pigeon I. Naturalised

Loganiaceae
Phyllangium paradoxum West Wallabi I.

Malvaceae
Lavatera sp. "Shearwater Islet"
Malva preissiana Australian Hollyhock 21 islands 15 islands 12 islands Harvey et al. (2001) lists this as Lavatera plebeia, but this is now a synonym of M. preissiana.[21] 100px
Malva linnaei Cretan Mallow Little 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] 100px
Malva parviflora Marshmallow East Wallabi I., North I., Pigeon I., West Wallabi I. Rat I. Newman I., Sid Liddon I. Naturalised Malva parviflora small.jpg
Sida spodochroma East Wallabi I.

Mimosaceae
Acacia didyma East Wallabi I.

Myoporaceae
Eremophila glabra Tar Bush East Wallabi I., West Wallabi I. Basile I., Middle I. Eremophila glabra Murchison Magic.jpg
Eremophila deserti East Wallabi I.
Myoporum insulare Blueberry Tree 27 islands 22 islands 17 islands 100px

Myrtaceae
Eucalyptus oraria Ooragmandee East Wallabi I.

Onagraceae
Epilobium billardiereanum Glabrous Willow Herb East Wallabi I.

Orobanchaceae
Orobanche minor Lesser Broomrape East Wallabi I. Naturalised 100px

Orchidaceae
Microtis media Tall Mignonette Orchid East Wallabi I. 100px
Microtis sp. East Wallabi I.

Oxalidaceae
Oxalis corniculata Yellow Wood Sorrel East Wallabi I., West Wallabi I. Naturalised Oxalis.corniculata.7562.JPG

Papilionaceae
Bossiaea spinescens East Wallabi I.
Medicago polymorpha Burr Medic Little Pigeon I., Pigeon I. Little Rat I., Rat I., Suomi I. Pelsaert I. Naturalised 100px
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 100px
Mirbelia ramulosa East Wallabi I.

Phormiaceae
Dianella revoluta Blueberry Lily "Eagle Point Islet", East Wallabi I., Oystercatcher I., Pigeon I., Seagull I., Tattler I., West Wallabi I.

Pittosporaceae
Pittosporum phylliraeoides Weeping Pittosporum 10 islands Middle I.

Plantaginaceae
Plantago coronopus Buckshorn Plantain Little Rat I. 100px
Plantago debilis East Wallabi I., North I., Pigeon I., West Wallabi I. Middle I.

Plumbaginaceae
Muellerolimon salicorniaceum 10 islands Little Rat I., Rat I. Middle I.

Poaceae
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 Oat Little Pigeon I., Pigeon I. Roma I., Wooded I. Basile I., Pelsaert I. Naturalised
Avena fatua Wild Oat North 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 100px
Avena sp. Beacon I., Tattler I. Bushby I. Naturalised
Bromus arenarius Sand Brome 13 islands 13 islands Burnett Rock, Burton I., Coronation I. Newman I., Pelsaert I., Post Office I., Stick I. 100px
Bromus diandrus Great Brome Beacon 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 100px
Bromus hordeaceus Soft Brome 11 islands Middle I., Pelsaert I., Square I. Naturalised 100px
Bromus japonicus var. vestitus Seal I. Naturalised
Bromus madritensis Madrid Brome North I. Naturalised
Bromus rubens Red Brome Basile I., Burnett Rock, Uncle Margie I. Naturalised 100px
Bromus sp. Campbell I. Gun I., Murray I., One I., Sweet I. Naturalised
Cynodon dactylon Couch East Wallabi I., North I., Pigeon I. Rat I., Wooded I. Naturalised Cynodon dactylon.jpg
Cynodon sp. Rat I.
Ehrharta brevifolia Annual Veldt Grass East Wallabi I. Pelsaert I. Naturalised
Ehrharta longiflora Annual Veldt Grass Barge Rock, Beacon I., Little Pigeon I., Pigeon I., Seagull I., Tattler I. 12 islands Basile Rock, Burton I., Eight I., Gun I., Jackson I., Newman I., Pelsaert I., Uncle Margie I. Naturalised
Eragrostis dielsii Mallee Lovegrass Akerstrom 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 Grass Little Pigeon I., North I., Pigeon I. Alexander Island Basile I. Naturalised; in Western Australia this is treated at species rank as Hordeum leporinum.[24]
Lachnagrostis filiformis Blown Grass East 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 Ryegrass West Wallabi I. Naturalised 100px
Lolium perenne Perennial Ryegrass West Wallabi I. Basile I. Naturalised 100px
Lolium rigidum Wimmera Ryegrass Alcatraz I., Little Pigeon I. Pelsaert I. Naturalised
Lolium temulentum Drake Campbell I., Leo I., Rat I. Stick I. Naturalised Illustration Lolium temulentum0.jpg
Parapholis incurva Coast Barbgrass North I. Bynoe I., Campbell I., Keru I., Leo I., Morley I., Roma I. Uncle Margie I. Naturalised
Pennisetum clandestinum Kikuyu Grass Little Rat I. Naturalised 100px
Phalaris canariensis Canary Grass Post Office I. Naturalised 100px
Phalaris minor Lesser Canary Grass North 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 100px
Poa annua Winter Grass Beacon I., East Wallabi I. Naturalised Poa annua.jpg
Poa poiformis Coastal Poa East Wallabi I.
Polypogon monspeliensis Annual Beardgrass Little Pigeon I., Long I., West Wallabi I. Naturalised 100px
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 Grass 16 islands 11 islands Burnett Rock, Burton I., Gun I., Middle I., Newman I., Pelsaert I., Square I., Three I.
Setaria sp. Dick I.
Spinifex longifolius Beach Spinifex 15 islands 13 islands Burton I., Coronation I., Hummock I., Middle I., Pelsaert I., Post Office I., Stick I., Uncle Margie I. 100px
Sporobolus virginicus Marine Couch North I., Oystercatcher I., Pigeon I., Seagull I., Turnstone I., West Wallabi I. Middle I. 100px
Triticum aestivum Wheat North I. Naturalised Wheat close-up.JPG
Vulpia myuros Rat's Tail Fescue Akerstrom I., East Wallabi I., Little Pigeon I., North I., Pigeon I., Turnstone I., West Wallabi I. Little Rat I., Rat I., Serventy I. Naturalised 100px

Polygonaceae
Emex australis Doublegee Little Pigeon I., Pigeon I. Rat I. Naturalised 100px

Portulacaceae
Calandrinia calyptrata Pink Purslane North I. Rotondella I., Uncle Margie I.

Primulaceae
Anagallis arvensis Pimpernel Pigeon I., West Wallabi I. Alexander I., Bushby I., Little Rat I., Rat I., Serventy I. Gun I., Middle I., Pelsaert I. Naturalised Scarlet pimpernel 800.jpg

Proteaceae
Grevillea argyrophylla Silvery-leaved Grevillea East Wallabi I., North I., Pelican I., Saville-Kent I., West Wallabi I. Basile I., Middle I., Murray I.

Ranunculaceae
Ranunculus sessiliflorus Smallflower Buttercup East Wallabi I.

Rhamnaceae
Spyridium globulosum Basket Bush East Wallabi I., North I., West Wallabi I.

Rubiaceae
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 Weed East Wallabi I.

Rutaceae
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. 100px

Santalaceae
Exocarpos aphyllus Leafless Ballart East Wallabi I., Little Pigeon I., Long I., Oystercatcher I., Pigeon I., Seagull I., Tattler I., West Wallabi I.
Exocarpos sparteus Broom Ballart North I., West Wallabi I.

Sapindaceae
Dodonaea aptera Coast Hop-bush East Wallabi I., North I., Oystercatcher I., West Wallabi I.
Dodonaea inaequifolia East Wallabi I., Oystercatcher I., West Wallabi I.
Dodonaea viscosa Sticky Hopbush Seagull I. 100px

Scrophulariaceae
Dischisma arenarium West Wallabi I. Naturalised

Solanaceae
Lycium ferocissimum African Boxthorn Wooded 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] 100px
Lycopersicon esculentum Tomato Rat I., Roma I. Jackson I., Middle I. Naturalised Tomato scanned.jpg
Nicotiana glauca Tree Tobacco Pigeon I. Naturalised 100px
Nicotiana occidentalis subsp. hesperis Native Tobacco 14 islands Alexander I., Morley I., White I., Wooded I. Middle I., Pelsaert I.
Solanum laciniatum Kangaroo Apple East Wallabi I. Naturalised 2007 solanum laciniatum.jpg
Solanum nigrum Black Berry Nightshade Beacon 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 100px
Solanum symonii Alcatraz I., Beacon I., East Wallabi I., Oystercatcher I., Seagull I.

Sterculiaceae
Lasiopetalum angustifolium Narrow Leaved Lasiopetalum East Wallabi I.

Tamaricaceae
Tamarix aphylla Athel Tree Pigeon 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] 100px

Thymelaeaceae
Pimelea microcephala Shrubby Riceflower 11 islands

Urticaceae
Parietaria cardiostegia Dakin I., Saville-Kent I. Bynoe I., Keru I. Burton I.
Parietaria debilis Pellitory Beacon 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 Nettle East Wallabi I., West Wallabi I. Naturalised 100px

Zygophyllaceae
Nitraria billardierei Nitre Bush 43 islands 30 islands 34 islands This is the most widespread plant species in the Houtman Abrolhos. Nitraria billardierei.jpg
Zygophyllum simile Beacon I., Dakin I., Dick I., East Wallabi I., Long I., North I., Saville-Kent I., West Wallabi I.

References

  1. ↑ Lua error in package.lua at line 80: module 'strict' not found. Data also available in Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  5. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  12. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  13. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  14. ↑ 14.0 14.1 14.2 Lua error in package.lua at line 80: module 'strict' not found.
  15. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  16. ↑ 16.0 16.1 16.2 16.3 Lua error in package.lua at line 80: module 'strict' not found.
  17. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  18. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  19. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  20. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  21. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  22. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  23. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  24. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  25. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  26. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  27. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  28. ↑ Lua error in package.lua at line 80: module 'strict' not found.
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