 A. brownii has a very limited range ; it is found only on the 0 @.@ 65 km2 ( 0 @.@ 25 sq mi ) island of Nihoa , located 275 km ( 171 mi ) northwest of Kauai . It is thought that this endemic plant has probably always been rare and restricted to Nihoa . Its habitat is managed by the United States Fish and Wildlife Service and protected as part of the Hawaiian Islands National Wildlife Refuge in the Papahānaumokuākea Marine National Monument . A. brownii is one of three endemic and endangered species only found on Nihoa , along with the Nihoa fan palm ( Pritchardia <unk> ) and the Nihoa carnation ( <unk> verticillata ) . At least nine other native plant species can be found in its habitat , including Hawaiian goosefoot ( Chenopodium <unk> ) , <unk> ( <unk> <unk> ) , <unk> <unk> ( Ipomoea indica ) , goat 's foot ( Ipomoea pes @-@ <unk> ssp. brasiliensis ) , Panicum <unk> , <unk> ( Scaevola sericea ) , <unk> <unk> , <unk> ( Sida fallax ) , and Nelson 's <unk> ( Solanum <unk> ) . 
