Nasturtium sarmentosum (Forst.f.) Schulz -- Synonym of Rorippa sarmentosa (DC.) Macbr.
Neottopteris nidus (L.) J.Smith -- Samoan name: laugapâpâ
Nicotiana tabacum L. -- Samoan name: tapa'a
Nothopanax fruticosum Miq. -- Synonym of Panax fruticosum L.
Nothopanax samoense A.Gray -- Synonym of Polyscias samoensis (A.Gray) Harms

Ocimum basilicum L. -- Samoan name: la'au sauga
Ocimum gratissimum L. -- Samoan name: la'au sauga
Ocimum sanctum L. -- Samoan name: la'au sauga
Omalanthus -- Samoan name: Homalanthus

Panax fruticosum L. -- Samoan name: tagitagi
Pandanus spp. -- Samoan name: fala
Pandanus tectorius Park. -- Samoan name: fala
Panicum spp. -- Samoan name: sefa
Parinari glaberrima Hassk. -- Synonym of Atuna racemosa Raf.
Parinarium laurinum A.Gray -- Synonym of Atuna racemosa Raf.
Peperomia pellucida (L.) H.B.K. -- Samoan name: vao vai
Persea americana P.Mill. -- Samoan name: 'avioka
Phaleria acuminata (A.Gray) Gilg -- Samoan name: pua vao, suni
Phaleria burnettiana Rein. -- Synonym of Phaleriadisperma (Forst.f.) Baill.
Phaleria disperma (Forst.f.) Baill. -- Samoan name: suni
Phyllanthus spp. -- Samoan name: fua lili'i
Phyllanthus amarus Sch. et Thon. -- Samoan name: fua lili'i
Phyllanthus niruri L. -- Synonym of Phyllanthus amarus Sch. et Thon.
Phyllanthus simplex Retz. -- Synonym of Phyllanthus virgatus Forst.f.
Phyllanthus virgatus Forst.f. -- Samoan name: 'avasâ, moimoi
Phymatosorus scolopendria (Burm.f.) Pichi-Serm. -- siehe Microsorium scolopendria (Burm.f.) Copel.
Physalis angulata L. -- Samoan name: vî vao
Piper spp. -- Samoan name: 'ava'ava aitu, fue manogi II
Piper graeffei Warb. -- Samoan name: 'ava'ava aitu, fue manogi II
Piper latifolium (Forst.f. ex) L.f. -- Samoan name: 'ava'ava aitu
Piper methysticum Forst.f. -- Samoan name: 'ava
Pipturus spp. -- Samoan name: fausogâ
Pipturus argenteus (Forst.f.) Wedd. -- Samoan name: fausogâ
Plectronia merrillii Setch. -- Synonym of Canthium merrillii (Setch.) Christoph.
Plumbago zeylanica L. -- Samoan name: lautafifi II
Plumeria rubra L. -- Samoan name: pua fiti
Pogostemon cablin (Blanco) Benth. -- Samoan name: pate papâlagi
Poinciana pulcherrima L. -- Synonym of Caesalpinia pulcherrima (L.) Sw.
Polypodium spp. -- Samoan name: toaniuvao
Polypodium dilatatum Wall. -- Synonym of Polypodium polynesicum C.Christ.
Polypodium phymatodes L. -- Synonym of Microsorium scolopendria (Burm.f.) Copel.
Polypodium polynesicum C.Christ. -- ohne samoanischen Namen
Polypodium scolopendria Burm.f. -- Synonym of Microsorium scolopendria (Burm.f.) Copel.
Polyscias samoensis (A.Gray) Harms -- Samoan name: tagitagi
Polyscias scutellaria (Burm.f.) Fosb. -- Samoan name: tagitagi
Portulaca quadrifida L. -- Samoan name: fiafiâtuli
Premna obtusifolia R.Br. -- Synonym of Premna serratifolia L.
Premna serratifolia L. -- Samoan name: aloalo
Premna taitensis Schauer -- Synonym of Premna serratifolia L.
Premna taitensis Schauer var. taitensis -- Samoan name: aloalo
Psidium guajava L. -- Samoan name: kuava
Psychotria spp. -- Samoan name: fatifati, la'au fai vaitusi, laumafatifati, olavai II
Psychotria forsteriana A.Gray -- Samoan name: siapo atua
Psychotria insularum A.Gray -- Samoan name: ma'anunu I, matalafi
Pteris spp. -- Samoan name: vao tuâniu