Solier (Scott Bay, South Australia, to Sorrento, Victoria, and southeastern Tasmania. Also widespread overseas.) Phylum Magnoliophyta (Angiosperms) Family Hydrocharitaceae Southern paddlegrass Halophila australis Doty & Stone (Dongara, Western Australia, to Sydney, New South Wales, and around Tasmania.) Oval paddlegrass Halophila ovalis (R. Brown) J.D. Hooker (Tropical Australia south to Cowaramup Bay, Western Australia, and to Twofold Bay, New South Wales, Also widespread in the Indo-West Pacific region.) Delicate paddlegrass Halophila decipiens Ostenfeld (Tropical Australia south to Albany, Western Australia, and to Mallacoota, Victoria. Also widespread in the Indo-West Pacific region.) Family Potamogetonaceae Swangrass Ruppia megacarpa Mason (Peel Inlet, Western Australia, to Jervis Bay, New South Wales, and around Tasmania. Also New Zealand.) Family Posidoniaceae Southern strapweed Posidonia australis Hooker (Shark Bay, Western Australia, to Lake Macquarie, New South Wales, and along the northern coast of Tasmania.) Fibrous strapweed Posidonia angustifolia Cambridge & Kuo (Houtman Abrolhos, Western Australia, to Port MacDonnell, South Australia, and northern Tasmania.) Smooth strapweed Posidonia sinuosa Cambridge & Kuo (Shark Bay, Western Australia, to Kingston, South Australia.) Den Hartog's strapweed Posidonia denhartogii Kuo & Cambridge (Perth, Western Australia, to Backstairs Passage, South Australia.) Thin-leafed strapweed Posidonia coriacea Cambridge & Kuo (Shark Bay, Western Australia, to Backstairs Passage, South Australia.) Robertson's strapweed Posidonia robertsonae Kuo & Cambridge (Cape Leeuwin to Israelite Bay, Western Australia.) Family Cymodoceaceae Tubular seagrass Syringodium isoetifolium (Ascherson) Dandy (Tropical Australia south to Garden Island, Western Australia, and to Moreton Bay, Queensland. Also widespread in the Indo-Pacific region.) Reef seagrass Thalassodendron pachyrhizum den Hartog (Geraldton to Bremer Bay, Western Australia.) Sea nymph, wireweed Amphibolis antarctica (Labillardière) Sonder & Ascherson ex Ascherson (Carnarvon, Western Australia, to Wilsons Promontory, Victoria, and south to Maria Island, Tasmania.) Griffith's sea nymph Amphibolis griffithii (J. Black) den Hartog (Champion Bay, Western Australia, to Victor Harbor, South Australia.) Family Zosteraceae Tasmanian eelgrass Heterozostera tasmanica (Martens ex Ascherson) den Hartog (Younghusband Peninsula, South Australia, to Wilsons Promontory, Victoria, and around Tasmania.) Black-stemmed eelgrass Heterozostera nigricaulis Kuo (Dongara, Western Australia, to Port Stephens (New South Wales), and around Tasmania.) Mueller's eelgrass Zostera muelleri Irmisch ex Ascherson (Perth, Western Australia, to southern Queensland and around Tasmania. Also New Zealand.) Mangroves Grey mangrove Avicennia marina (Forsskål) Vierhapper (Around mainland Australia. Also Lord Howe Island.) River mangrove Aegiceras corniculatum (Linnaeus) Blanco (Tropical Australia south to Shark Bay, Western Australia, and to Merimbula, New South Wales. Also Lord Howe Island.) Saltmarsh plants Beaded glasswort Sarcocornia quinqueflora (Bunge