The Flora of the Coral Sea Islands consists of 16 families, 24 genera and 26 species. Five of these species are introduced and naturalised. The vegetation is mostly herbfields, although a few islands support shrubs and low forests.
The following plant taxa occur on the Coral Sea Islands: Taxon Common name Remarks Abutilon asiaticum var. australiense . Achranthes aspera Heliotropium foertherianum Boerhavia albiflora Boerhavia glabrata Calophyllum inophyllum Canavalia rosea Commicarpus insularum Recorded in 1979, but not in 1993 Cordia subcordata Tou Coronopus integrifolius Naturalised Cynodon dactylon Naturalised Digitaria ctenantha Euphorbia cyathophora Naturalised Ipomoea macrantha Ipomoea pes-caprae subsp. brasiliensis Lepturus repens Pisonia grandis Plumbago zeylanica Portulaca oleracea Common Purslane Naturalised Scaevola taccada Sporobulus virginicus Stenotaphrum micranthum Thuarea involuta Tribulus cistoides Tridax procumbens Naturalised Ximenia americana
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