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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)

Aizoaceae

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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.
Mesembryanthemum crystallinum Iceplant 40 islands 18 islands 30 islands Naturalised
Sesuvium portulacastrum Campbell I.
Tetragonia decumbens Sea Spinach Crake I., Keru I., White I., Wooded I. Naturalised

Amaranthaceae

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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

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Thysanotus patersonii East Wallabi I., North I., Pigeon I., Seagull I., West Wallabi I.

Apiaceae

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Apium annuum East Wallabi I., West Wallabi I. Alexander I., Campbell I., Serventy I.
Apium prostratum Sea Celery Tattler I. Middle I.
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
Trachymene pilosa Native Parsnip East Wallabi I.

Apocynaceae

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Alyxia buxifolia Dysentery Bush East Wallabi I., Seagull I. and West Wallabi I.

Asclepiadaceae

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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

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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

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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.
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
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]
Erigeron karvinskianus Gun I., Murray I. Naturalised
Euchiton sphaericus East Wallabi I., North I. Rat I.
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]
Hypochaeris glabra Smooth Catsear Basile I. Naturalised
Lactuca saligna Wild Lettuce Pigeon I. Naturalised
Olearia axillaris Coastal Daisybush Eastern I., East Wallabi I., Long I., North I., Pigeon I., Turnstone I., West Wallabi I. Campbell I.
Podotheca angustifolia Sticky Longheads North I., West Wallabi I.
Reichardia tingitana False Sowthistle Campbell I., Rat I. Basile I., Middle I. Naturalised
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.
Urospermum picroides False Hawkbit 10 islands 10 islands Burnett Rock, Burton I., Gun I., Post Office I., Uncle Margie I. Naturalised
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

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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

Boraginaceae

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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]
Trichodesma zeylanicum Camel Bush North I.

Brassicaceae

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Brassica rapa Beacon I. Naturalised
Cakile maritima Sea Rocket 10 islands 13 islands 12 islands Naturalised
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
Raphanus sativus Radish Alexander I. Basile I., Burnett Rock Naturalised
Sisymbrium irio London Rocket Suomi I. Naturalised
Sisymbrium orientale Indian Hedge Mustard Beacon I. Little Rat I., Rat I. Burnett Rock Naturalised

Cactaceae

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Opuntia stricta Common Prickly Pear Rat I. Basile I. Naturalised

Campanulaceae

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Wahlenbergia gracilis Rat I.
Wahlenbergia multicaulis Rat I.

Capparaceae

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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.

Caryophyllaceae

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Cerastium glomeratum Mouse Ear Chickweed Eight I., Three I. Naturalised
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]
Polycarpon tetraphyllum Fourleaf Allseed East Wallabi I., Little Pigeon I., Pigeon I. Little Roma I. Basile I., Jackson I. Naturalised
Sagina apetala Annual Pearlwort East Wallabi I. Naturalised
Silene gallica French Catchfly White I. Naturalised
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
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

Celastraceae

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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

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Atriplex amnicola Swamp Saltbush Gun I., Murray I., Pelsaert I.
Atriplex bunburyana Silver Saltbush Rat I.
Atriplex cinerea Grey Saltbush 27 islands 21 islands 22 islands
Atriplex paludosa Marsh Saltbush Little 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 Saltbush Seagull I.
Atriplex sp. Saltbush 17 islands 10 islands 18 islands
Chenopodium album Fat Hen Rat I. Naturalised
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
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
Sarcocornia quinqueflora Beaded Samphire 17 islands 19 islands 15 islands
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]
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

Colchicaceae

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

Convolvulaceae

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Ipomoea cairica Little Rat I. Naturalised

Crassulaceae

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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]
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.

Cucurbitaceae

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Cucurbita pepo Rat I.

Cunoniaceae

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Aphanopetalum clematideum East Wallabi I.

Cyperaceae

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

Dasypogonaceae

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

Dilleniaceae

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

Epacridaceae

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Leucopogon insularis East Wallabi I., West Wallabi I.

Euphorbiaceae

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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

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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

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Centaurium erythraea Common Centaury Bushby 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]

Geraniaceae

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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
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

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

Haloragaceae

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Haloragis trigonocarpa East Wallabi I., Pigeon I.

Juncaceae

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

Juncaginaceae

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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

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

Liliaceae

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Aloe sp. Little Pigeon I. Naturalised

Loganiaceae

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Phyllangium paradoxum West Wallabi I.

Malvaceae

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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]
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]
Malva parviflora Marshmallow East Wallabi I., North I., Pigeon I., West Wallabi I. Rat I. Newman I., Sid Liddon I. Naturalised
Sida spodochroma East Wallabi I.

Mimosaceae

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Acacia didyma East Wallabi I.

Myoporaceae

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Eremophila glabra Tar Bush East Wallabi I., West Wallabi I. Basile I., Middle I.
Eremophila deserti East Wallabi I.
Myoporum insulare Blueberry Tree 27 islands 22 islands 17 islands

Myrtaceae

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Eucalyptus oraria Ooragmandee East Wallabi I.

Onagraceae

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Epilobium billardiereanum Glabrous Willow Herb East Wallabi I.

Orobanchaceae

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Orobanche minor Lesser Broomrape East Wallabi I. Naturalised

Orchidaceae

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Microtis media Tall Mignonette Orchid East Wallabi I.
Microtis sp. East Wallabi I.

Oxalidaceae

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

Papilionaceae

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Bossiaea spinescens East Wallabi I.
Medicago polymorpha Burr Medic Little 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.

Phormiaceae

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

Pittosporaceae

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Pittosporum phillyreoides Weeping Pittosporum 10 islands Middle I.

Plantaginaceae

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

Plumbaginaceae

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

Poaceae

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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
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.
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
Bromus hordeaceus Soft Brome 11 islands Middle I., Pelsaert I., Square I. Naturalised
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
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 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
Lolium perenne Perennial Ryegrass West Wallabi I. Basile I. Naturalised
Lolium rigidum Wimmera Ryegrass Alcatraz I., Little Pigeon I. Pelsaert I. Naturalised
Lolium temulentum Drake Campbell I., Leo I., Rat I. Stick I. Naturalised
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
Phalaris canariensis Canary Grass Post Office I. Naturalised
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
Poa annua Winter Grass Beacon I., East Wallabi I. Naturalised
Poa poiformis Coastal Poa East Wallabi I.
Polypogon monspeliensis Annual Beardgrass Little 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 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.
Sporobolus virginicus Marine Couch North I., Oystercatcher I., Pigeon I., Seagull I., Turnstone I., West Wallabi I. Middle I.
Triticum aestivum Wheat North I. Naturalised
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

Polygonaceae

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Emex australis Doublegee Little Pigeon I., Pigeon I. Rat I. Naturalised

Portulacaceae

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

Primulaceae

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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

Proteaceae

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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

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Ranunculus sessiliflorus Smallflower Buttercup East Wallabi I.

Rhamnaceae

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

Rubiaceae

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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

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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.

Santalaceae

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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

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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.

Scrophulariaceae

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Dischisma arenarium West Wallabi I. Naturalised

Solanaceae

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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]
Lycopersicon esculentum Tomato Rat I., Roma I. Jackson I., Middle I. Naturalised
Nicotiana glauca Tree Tobacco Pigeon I. Naturalised
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
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
Solanum symonii Alcatraz I., Beacon I., East Wallabi I., Oystercatcher I., Seagull I.

Sterculiaceae

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Lasiopetalum angustifolium Narrow Leaved Lasiopetalum East Wallabi I.

Tamaricaceae

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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]

Thymelaeaceae

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Pimelea microcephala Shrubby Riceflower 11 islands

Urticaceae

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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

Zygophyllaceae

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Nitraria billardierei Nitre Bush 43 islands 30 islands 34 islands This 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

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  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 23 July 2008. Retrieved 2 February 2008.
  2. ^ "Calocephalus aervoides (F.Muell.) Benth". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  3. ^ "Chthonocephalus tomentellus (F.Muell.) Benth". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. ^ "Name Currency — Conyza albida Spreng". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 23 February 2008.
  5. ^ "Name Currency — Pseudognaphalium luteoalbum (L.) Hilliard & B.L.Burtt". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 9 January 2009.
  6. ^ "Name Currency — Senecio lautus Willd". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 3 February 2008.
  7. ^ "Name Currency — Sonchus tenerrimus L." FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 23 February 2008.
  8. ^ "Name Currency — Cynoglossum australe R.Br". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 3 February 2008.
  9. ^ Department of Fisheries (Western Australia) (2007). "Management of the Houtman Abrolhos System: A Draft Review 2007 – 2017" (PDF). Fisheries Management Paper No. 220. Archived from the original (PDF) on 11 October 2007. Retrieved 1 December 2007. {{cite journal}}: Cite journal requires |journal= (help)
  10. ^ "Name Currency — Hymenolobus procumbens (L.) Schinz & Thell". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 4 February 2008.
  11. ^ "Lepidium puberulum Bunge". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  12. ^ "Name Currency — Petrorhagia velutina (Guss.) P.W.Ball & Heywood". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 24 February 2008.
  13. ^ "Name Currency — Spergularia nesophila L.G.Adams ms". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 24 February 2008.
  14. ^ a b c Stevens, P. F. (June 2007). "Celastrales". Angiosperm Phylogeny Website (Version 8). Retrieved 22 February 2008.
  15. ^ "Name Currency — Stackhousia viminea Sm". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 4 January 2009.
  16. ^ a b c d 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 5 February 2008.
  19. ^ "Name Currency — Centaurium maritimum (L.) Janch". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 7 February 2008.
  20. ^ "FloraBase Search: genus:Pelargonium species:zonale". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 25 February 2008.
  21. ^ "Name Currency — Malva australiana M.F.Ray". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 9 February 2008.
  22. ^ "* Malva linnaei M.F.Ray". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  23. ^ "Name Currency — Malva cretica L." FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 25 February 2008.
  24. ^ "Hordeum leporinum Link". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  25. ^ "Name Currency — Agrostis avenacea J.F.Gmel". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 9 February 2008.
  26. ^ "Name Currency — Galium migrans Ehrend. & McGill". FloraBase. Department of Environment and Conservation, Government of Western Australia. Retrieved 28 October 2010.
  27. ^ "African boxthorn eradication close". NatureBase. Department of Environment and Conservation, Western Australia. 3 July 2007. Retrieved 27 February 2008.
  28. ^ "Search: Genus: Tamarix". FloraBase. Department of Environment and Conservation, Western Australia. Retrieved 23 February 2008.
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