Dendrobium speciosum, commonly known as the Sydney rock orchid or rock lily,[2] is a highly variable Australian native orchid that forms a species complex. Its varieties can be found in a range of habitats as an epiphyte (on branches or trunks of trees) or a lithophyte. It has a continuous distribution along the east coast of Australia and in distinct populations along the Tropic of Capricorn. As a lithophyte, it forms gigantic spreading colonies on rocks and cliff faces, often exposed to full sun, with its roots forming dense, matted beds across the rock that anchor the plant. It can be found at altitudes from sea level to 900 metres (3,000 ft).

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