List of flora of Nihoa
This is a list of the flora of Nihoa, an island in the Northwestern Hawaiian Islands, part of the City & County of Honolulu in the U.S. state of Hawaii. Nihoa is listed in the National Register of Historic Places and protected under the Papahānaumokuākea Marine National Monument.
| Species | Common name | Status | 
|---|---|---|
| Nephrolepis multiflora | Sword fern | Naturalized alien | 
| Pritchardia remota | Loulu | Endemic | 
| Cenchrus echinatus | Sandbur | Naturalized alien | 
| Eragrostis variabilis | ʻEmo-loa | Indigenous | 
| Panicum torridum | Kākonakona | Indigenous | 
| Paspalum sp. | Naturalized alien | |
| Setaria verticillata | Bristly foxtail | Naturalized alien | 
| Tetragonia tetragonoides | New Zealand spinach | Naturalized alien | 
| Amaranthus brownii | Endemic | |
| Heliotropium curassavicum | Nena | Indigenous | 
| Schiedea verticillata | Nihoa carnation | Endemic | 
| Chenopodium oahuense | ʻAweoweo | Indigenous | 
| Ipomoea indica | Koaliʻawahia | Indigenous | 
| Ipomoea pes-caprae | Beach morning glory | Indigenous | 
| Sicyos pachycarpus | ʻĀnunu | Indigenous | 
| Euphorbia celastroides | ʻAkoko | Indigenous | 
| Sesbania tomentosa | ʻOhai | Indigenous | 
| Sida fallax | ʻIlima | Indigenous | 
| Boerhavia repens | Alena | Indigenous | 
| Rumex albescens | Huʻahuʻakō | Indigenous | 
| Portulaca lutea | ʻIhi | Indigenous | 
| Portulaca oleracea | Common purslane | Naturalized alien | 
| Portulaca villosa | Hairy purslane, ʻIhi | Indigenous | 
| Solanum americanum | Popolo | Indigenous | 
| Solanum nelsonii | Indigenous | |
| Tribulus cistoides | Nohu | Indigenous |