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Range DescriptionCapparis sandwichiana is endemic to the Hawaiian Islands. There are many occurrences still surviving on the islands of Kaua`i, Kaho`olawe, O`ahu, Ni`ihau, Moloka`i, Maui, Lana`i, and Hawai`i. Also found on the Northwestern Hawaiian islands of Midway Atoll, Pearl and Hermes Atoll, and Laysan. The total number of plants remaining is still in the thousands, however, a decline in the total population of at least 10% has been estimated over the last ten years.