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[]
Carpobrotus sp.
Carpobrotus virescens	Coastal Pigface	13 islands	25 islands	23 islands
Disphyma crassifolium subsp. clavellatum	Round-leaved Pigface	Pigeon I.	,
Mesembryanthemum crystallinum	Iceplant	40 islands	18 islands	30 islands	Naturalised
Sesuvium portulacastrum
Tetragonia decumbens	Sea Spinach		, , , Wooded I.		Naturalised
Amaranthaceae[]
Ptilotus divaricatus	Climbing Mulla Mulla	East Wallabi I.
		East Wallabi I., West Wallabi I.
		East Wallabi I.
Ptilotus obovatus	Cotton Bush	East Wallabi I.
		West Wallabi I.
Anthericaceae[]
Thysanotus patersonii		East Wallabi I., North I., Pigeon I., , West Wallabi I.
Apiaceae[]
Apium annuum		East Wallabi I., West Wallabi I.	Alexander I., ,
Apium prostratum	Sea Celery			Middle I.
Daucus glochidiatus	Australian Carrot	East Wallabi I., North I., Pigeon I., West Wallabi I.	, ,	Middle I.
		East Wallabi I., West Wallabi I.		, Middle I.
Petroselinum crispum	Parsley		, ,		Naturalised
	Native Parsnip	East Wallabi I.
Apocynaceae[]
Alyxia buxifolia	Dysentery Bush	East Wallabi I., and West Wallabi I.
Asclepiadaceae[]
		"Eagle Point Islet", East Wallabi I., Oystercatcher I., Pigeon I., and West Wallabi I.		, Middle I.
Asphodelaceae[]
Bulbine semibarbata	Leek Lily	"Eagle Point Islet", East Wallabi I., , North I., Pigeon I. and West Wallabi I.		Middle I., Pelsaert I.
Asteraceae[]
Actinobole condensatum		East Wallabi I., North I., West Wallabi I.
Actites megalocarpa	Dune Thistle	, , Oystercatcher I., Pigeon I.,		Pelsaert I.
	Camel-grass	East Wallabi I.
Brachyscome ciliaris		East Wallabi I., North I., Pigeon 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	, Pigeon I.	, , ,		Naturalised
Conyza sumatrensis	Tall Fleabane				Naturalised. Harvey et al. (2001) lists C. albida, but this is now a taxonomic synonym of C. sumatrensis.[4]
Erigeron karvinskianus				Gun I.,	Naturalised
Euchiton sphaericus		East Wallabi I., North I.
	Tiny Cudweed	East Wallabi I.
Helichrysum luteoalbum	Jersey Cudweed	East Wallabi I., North I., Turnstone I., West Wallabi I.	,		Naturalised. Harvey et al. (2001) lists Pseudognaphalium luteoalbum, but this is now a nomenclatural synonym of Helichrysum luteoalbum.[5]
Hypochaeris glabra	Smooth Catsear				Naturalised
Lactuca saligna	Wild Lettuce	Pigeon I.			Naturalised
Olearia axillaris	Coastal Daisybush	, East Wallabi I., , North I., Pigeon I., Turnstone I., West Wallabi I.
Podotheca angustifolia	Sticky Longheads	North I., West Wallabi I.
Reichardia tingitana	False Sowthistle		,	, 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 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	, Burton I., Gun I., ,	Naturalised
Ursinia anthemoides	Ursinia		Alexander I., , ,	, Burton I.	Naturalised.
	Woolly Vittadinia	, , East Wallabi I., , , Turnstone I.
Vittadinia sp.		East Wallabi I.
Avicenniaceae[]
Avicennia marina	White Mangrove	, "East Mangrove I.", , Oystercatcher I., , , Turnstone I., West Wallabi I.	Alexander I., , , , "Little Stokes I.", Morley I., , Suomi I., Wooded I.	14 islands
Boraginaceae[]
	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[]
Brassica rapa		Beacon I.			Naturalised
Cakile maritima	Sea Rocket	10 islands	13 islands	12 islands	Naturalised
Hornungia procumbens	Oval Purse	14 islands	, , Morley 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]
			, , Little North I.,
		Beacon I., , , , , Seal I.		, Burton I., , , "Little Jackson I.", , Pelsaert I., ,
Lepidium puberulum		, "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., , ,	, Gun I., , Pelsaert I.,	Naturalised
Raphanus sativus	Radish		Alexander I.	,	Naturalised
Sisymbrium irio	London Rocket		Suomi I.		Naturalised
Sisymbrium orientale	Indian Hedge Mustard	Beacon I.	,		Naturalised
Cactaceae[]
Opuntia stricta	Common Prickly Pear				Naturalised
Campanulaceae[]
Wahlenbergia gracilis
Wahlenbergia multicaulis
Capparaceae[]
Capparis spinosa	Coastal Caper	"Eagle Point Islet", East Wallabi I., , Oystercatcher I., Pigeon I., , , Turnstone I., West Wallabi I.
Caryophyllaceae[]
Cerastium glomeratum	Mouse Ear Chickweed			,	Naturalised
Petrorhagia dubia	Velvet Pink				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., , Pigeon I.		,	Naturalised
Sagina apetala	Annual Pearlwort	East Wallabi I.			Naturalised
Silene gallica	French Catchfly				Naturalised
	Mediterranean Catchfly		Alexander I., , , Morley I.,		Naturalised
	Lesser Sand Spurry			Gun I.	Naturalised
Spergularia rubra	Sand Spurry	12 islands	,	Pelsaert I.,	Naturalised
Spergularia sp. 5 Leeman					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[]
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 .[15] Harvey et al. (2001) treats Stackhousia under Stackhousiaceae, but it is now generally treated under Celastraceae.[14]
		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., , Pelsaert I.
Atriplex bunburyana	Silver Saltbush
Atriplex cinerea	Grey Saltbush	27 islands	21 islands	22 islands
Atriplex paludosa	Marsh Saltbush	, , , North I., , Pigeon I., , West Wallabi I.
Atriplex paludosa subsp. baudinii
Atriplex vesicaria subsp. variabilis	Bladder Saltbush
Atriplex sp.	Saltbush	17 islands	10 islands	18 islands
Chenopodium album	Fat Hen				Naturalised
Chenopodium melanocarpum	Black Crumbweed	East Wallabi I.
Chenopodium murale	Nettle-leaf Goosefoot	Beacon I., North I., , West Wallabi I.	Alexander I., , "Landscope I.", "Nitraria I.", , Wooded I.	Burton I., Gun I., "Little Jackson I.", Pelsaert I., ,	Naturalised
Chenopodium nitrariaceum	Nitre Goosefoot	East Wallabi I., West Wallabi I.
		East Wallabi I.
Enchylaena tomentosa	Barrier Saltbush	26 islands	11 islands	17 islands
Rhagodia baccata	Berry Saltbush	, East Wallabi I., North I., Oystercatcher I., Pigeon I., , , Turnstone I., West Wallabi I.
Rhagodia latifolia		, "Eagle Point Islet", , North I., Pigeon I.
			,
Rhagodia sp.
Salsola kali	Prickly Saltwort	, , East Wallabi I., , North I., Seal I., , West Wallabi I.	, , , , Morley I.,	, , Pelsaert I.,	Naturalised
Sarcocornia quinqueflora	Beaded Samphire	17 islands	19 islands	15 islands
Suaeda australis	Seablite	11 islands	"Nitraria I.", , Wooded I.	, Pelsaert I.
Tecticornia arbuscula		East Wallabi I., North I., Pigeon I., West Wallabi I.		Gun I., Middle I., , Pelsaert I.	Harvey et al. (2001) listed Sclerostegia arbuscula, but all Sclerostegia were transferred into Tecticornia in 2007.[16]
Tecticornia halocnemoides	Shrubby Samphire	, , , 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]
			,	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[]
Wurmbea monantha		East Wallabi I., North I., West Wallabi I.	Alexander I.,
Convolvulaceae[]
Ipomoea cairica					Naturalised
Crassulaceae[]
Bryophyllum delagoense	Mother of Millions	Pigeon I.			Naturalised. In 2000 this poisonous weed was found to have colonised over half of Rat and Pigeon Islands.[17]
Crassula colorata	Dense Stonecrop	, , East Wallabi I., , North I., , West Wallabi I.	10 islands	, Burton I., Middle I., Pelsaert I.,
Crassula exserta			, , ,
Cotyledon orbiculata		, , Pigeon I., West Wallabi I.
Cucurbitaceae[]
Cucurbita pepo
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]
	Coarse Clubrush	East Wallabi I., West Wallabi I.			Naturalised
Dasypogonaceae[]
Acanthocarpus preissii		"Eagle Point Islet", East Wallabi I., , North I., Oystercatcher I., Pigeon I., , , West Wallabi I.
Dilleniaceae[]
Hibbertia racemosa	Stalked Guinea Flower	East Wallabi I., West Wallabi I.
Epacridaceae[]
		East Wallabi I., West Wallabi I.
Euphorbiaceae[]
Beyeria viscosa	Pinkwood	East Wallabi I., Oystercatcher I., West Wallabi I.
	Gascoyne Spurge	Pigeon I.
	Caustic Weed	East Wallabi I., West Wallabi I.	,	Middle I.
Euphorbia tannensis		"Eagle Point Islet", , North I., Oystercatcher I., Pigeon I., , Turnstone I.		Middle I.
	Geraldton Carnation Weed	Pigeon I.	,		Naturalised
Phyllanthus calycinus	False Boronia	East Wallabi I., West Wallabi I.
Frankeniaceae[]
Frankenia pauciflora	Seaheath	11 islands	, , ,	, Gun I., Middle I., , Pelsaert I.,
Gentianaceae[]
Centaurium erythraea	Common Centaury		,		Naturalised
Schenkia australis		East Wallabi I., North I., Pigeon I., , Turnstone I., West Wallabi 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 on East Wallabi Island, but this name has been misapplied for C. spicatum in Australia.[19]
Geraniaceae[]
Erodium cicutarium	Common Storksbill	, East Wallabi I., , North I., Pigeon I., West Wallabi I.	,	Middle I., Pelsaert I.,	Naturalised
Erodium cygnorum	Blue Heronsbill	East Wallabi I., North I., Pigeon I.
Pelargonium littorale		East Wallabi I.
Pelargonium zonale					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., , West Wallabi I.	, , Suomi I.	Pelsaert I.
Haloragaceae[]
		East Wallabi I., Pigeon I.
Juncaceae[]
Juncus bufonius	Toad Rush	East Wallabi I., North I., Pigeon I., West Wallabi I.			Naturalised
Juncaginaceae[]
		, Pigeon I., West Wallabi I.		Gun I., Middle I., Pelsaert I.,
Triglochin mucronata		North I., West Wallabi I.
		East Wallabi I.
Triglochin trichophora		, East Wallabi I., North I.	, ,
Lamiaceae[]
Westringia dampieri		East Wallabi I., , West Wallabi I.
Liliaceae[]
Aloe sp.					Naturalised
Loganiaceae[]
		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]
Malva linnaei	Cretan Mallow		Little North 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.		,	Naturalised
		East Wallabi I.
Mimosaceae[]
Acacia didyma		East Wallabi I.
Myoporaceae[]
Eremophila glabra	Tar Bush	East Wallabi I., West Wallabi I.		, Middle I.
Eremophila deserti		East Wallabi I.
Myoporum insulare	Blueberry Tree	27 islands	22 islands	17 islands
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
Orchidaceae[]
Microtis media	Tall Mignonette Orchid	East Wallabi I.
Microtis sp.		East Wallabi I.
Oxalidaceae[]
Oxalis corniculata	Yellow Wood Sorrel	East Wallabi I., West Wallabi I.			Naturalised
Papilionaceae[]
Bossiaea spinescens		East Wallabi I.
Medicago polymorpha	Burr Medic	, Pigeon I.	, , Suomi I.	Pelsaert I.	Naturalised
Medicago sp.					Naturalised
Melilotus indicus		Beacon I., North I.	, ,	, Gun I., Pelsaert I.,	Naturalised
		East Wallabi I.
Phormiaceae[]
Dianella revoluta	Blueberry Lily	"Eagle Point Islet", East Wallabi I., Oystercatcher I., Pigeon I., , , West Wallabi I.
Pittosporaceae[]
Pittosporum phillyreoides	Weeping Pittosporum	10 islands		Middle I.
Plantaginaceae[]
Plantago coronopus	Buckshorn Plantain
Plantago debilis		East Wallabi I., North I., Pigeon I., West Wallabi I.		Middle I.
Plumbaginaceae[]
Muellerolimon salicorniaceum		10 islands	,	Middle I.
Poaceae[]
Austrodanthonia caespitosa		East Wallabi I., North I.
Austrostipa crinita		North I.
Austrostipa elegantissima		East Wallabi I., , Oystercatcher I., Pigeon I., , Turnstone I., West Wallabi I.		Middle I.
Austrostipa flavescens		, Oystercatcher I., ,
Austrostipa variabilis		East Wallabi I., North I., , West Wallabi I.
Avena barbata	Bearded Oat	, Pigeon I.	, Wooded I.	, Pelsaert I.	Naturalised
Avena fatua	Wild Oat	North I.	Alexander I., , , , Suomi I., Wooded I.	, , Burton I., Pelsaert I.,	Naturalised
Avena sp.		Beacon I.,			Naturalised
Bromus arenarius	Sand Brome	13 islands	13 islands	, Burton I., , Pelsaert I., ,
Bromus diandrus	Great Brome	Beacon I., , , North I., Pigeon I., , Turnstone I.	Alexander I., , , , Wooded I.	, Burton I., ,	Naturalised
Bromus hordeaceus	Soft Brome	11 islands		Middle I., Pelsaert I.,	Naturalised
		Seal I.			Naturalised
Bromus madritensis	Madrid Brome	North I.			Naturalised
Bromus rubens	Red Brome			, ,	Naturalised
Bromus sp.				Gun I., , ,	Naturalised
Cynodon dactylon	Couch	East Wallabi I., North I., Pigeon I.	, Wooded I.		Naturalised
Cynodon sp.
	Annual Veldt Grass	East Wallabi I.		Pelsaert I.	Naturalised
	Annual Veldt Grass	, Beacon I., , Pigeon I., ,	12 islands	, Burton I., , Gun I., , , Pelsaert I.,	Naturalised
Eragrostis dielsii	Mallee Lovegrass	, East Wallabi I., , North I., Pigeon I., Turnstone I.	,	Pelsaert I.
Hordeum murinum subsp. leporinum	Barley Grass	, North I., Pigeon I.	Alexander Island		Naturalised; in Western Australia this is treated at species rank as Hordeum leporinum.[24]
	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.			Naturalised
Lolium rigidum	Wimmera Ryegrass	,		Pelsaert I.	Naturalised
Lolium temulentum	Drake		, ,		Naturalised
Parapholis incurva	Coast Barbgrass	North I.	, , , , Morley I.,		Naturalised
Pennisetum clandestinum	Kikuyu Grass				Naturalised
Phalaris canariensis	Canary Grass				Naturalised
Phalaris minor	Lesser Canary Grass	North I., Pigeon I., East Wallabi I.	Alexander I., Morley I., , Suomi I.	, , Burton 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	, , West Wallabi I.			Naturalised
		East Wallabi I., Pigeon I., West Wallabi I.
Rostraria cristata		, North I., Pigeon I.	,		Naturalised
Setaria dielsii	Diels' Pigeon Grass	16 islands	11 islands	, Burton I., Gun I., Middle I., , Pelsaert I., ,
Setaria sp.
Spinifex longifolius	Beach Spinifex	15 islands	13 islands	Burton I., , , Middle I., Pelsaert I., , ,
Sporobolus virginicus	Marine Couch	North I., Oystercatcher I., Pigeon I., , Turnstone I., West Wallabi I.		Middle I.
Triticum aestivum	Wheat	North I.			Naturalised
Vulpia myuros	Rat's Tail Fescue	, East Wallabi I., , North I., Pigeon I., Turnstone I., West Wallabi I.	, ,		Naturalised
Polygonaceae[]
Emex australis	Doublegee	, Pigeon I.			Naturalised
Portulacaceae[]
Calandrinia calyptrata	Pink Purslane	North I.		,
Primulaceae[]
Anagallis arvensis	Pimpernel	Pigeon I., West Wallabi I.	Alexander I., , , ,	Gun I., Middle I., Pelsaert I.	Naturalised
Proteaceae[]
Grevillea argyrophylla	Silvery-leaved Grevillea	East Wallabi I., North I., , , West Wallabi I.		, Middle I.,
Ranunculaceae[]
	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., , Oystercatcher I., Pigeon I., , , Turnstone I., West Wallabi I.	,	Gun I.
Santalaceae[]
Exocarpos aphyllus	Leafless Ballart	East Wallabi I., , , Oystercatcher I., Pigeon 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.
		East Wallabi I., Oystercatcher I., West Wallabi I.
Dodonaea viscosa	Sticky Hopbush
Scrophulariaceae[]
		West Wallabi I.			Naturalised
Solanaceae[]
Lycium ferocissimum	African Boxthorn		Wooded I.	, , , Gun I., Pelsaert 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		,	, Middle I.	Naturalised
Nicotiana glauca	Tree Tobacco	Pigeon I.			Naturalised
Nicotiana occidentalis subsp. hesperis	Native Tobacco	14 islands	Alexander I., Morley 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., , Pigeon I., West Wallabi I.	, , ,	, Gun I.	Naturalised
		, Beacon I., East Wallabi I., Oystercatcher I.,
Sterculiaceae[]
	Narrow Leaved Lasiopetalum	East Wallabi I.
Tamaricaceae[]
Tamarix aphylla	Athel Tree	, 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[]
Pimelea microcephala	Shrubby Riceflower	11 islands
Urticaceae[]
		,	,	Burton I.
Parietaria debilis	Pellitory	Beacon I., , , , East Wallabi I., , North I., , West Wallabi I.	Alexander I., , , , Little North I., Morley I., ,	13 islands
Urtica urens	Small Nettle	East Wallabi I., West Wallabi I.			Naturalised
Zygophyllaceae[]
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., , , East Wallabi I., , North I., , West Wallabi I.

References[]