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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| States |
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| Mainland territories |
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| External territories |
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