Six plant species known historically from the NWHI are listed as endangered. Three plant taxa have probably always been rare and restricted to Nihoa, although one species, the loulu or fan palm, also occurred on Laysan Island. Mariscus pennatiformis ssp. bryanii is known only from Laysan Island. Cenchrus agrimonioides var. laysanensis was historically known from Laysan Island, Midway Atoll and Kure Atoll, but has not been seen there since about 1980. A recovery plan for three species found only at Nihoa (Nihoa fan palm, Schiedea verticillata, and Amaranthus brownii) was finalized in 1998 (FWS 1998). Recovery actions for the other three species (Cenchrus agrimonioides, Mariscus pennatiformis, and Sesbania tomentosa or ‘ohai) are described in the Recovery Plan for the Multi-Island Plants (FWS 1999). To view the Recovery Plans, go to Pacific Islands Fish and Wildlife Office Recovery Plans.