Rhaphidophora graeffei Engl. -- Samoan name: pau tutuga
Rhaphidophora reineckei Engl. -- Samoan name: pau tutuga
Rhizophora mangle L. -- Samoan name: togo togo
Ricinus communis L. -- Samoan name: lama pâlagi
Rorippa sarmentosa (DC.) Macbr. -- Samoan name: a'atasi

Saccharum officinarum L. -- Samoan name: tolo
Santalum spp. -- Samoan name: asi manogi
Sarcopygme spp. -- Samoan name: u'unu
Scaevola frutescens (Mill.) Krause -- Synonym of Scaevola taccada (Gaertn.) Roxb.
Scaevola koenigii Vahl -- Synonym of Scaevola taccada (Gaertn.) Roxb.
Scaevola taccada (Gaertn.) Roxb. -- Samoan name: to'ito'i
Schizostachyum glaucifolium (Rupr.) Munro -- Samoan name: 'ofe ('ofe samoa)
Senna alata (L.) Roxb. -- Samoan name: la'au fai lafa
Senna sophera (L.) Roxb. -- Samoan name: la'au tinei lafa
Sida acuta Burm.f. -- Samoan name: mautofu I
Sida rhombifolia L. -- Samoan name: mautofu I
Solanum spp. -- Samoan name: polo
Spondias dulcis Park. -- Samoan name: vî
Stachytarpheta spp. -- Samoan name: mautofu tala
Stachytarpheta jamaicensis (L.) Vahl -- Samoan name: mautofu tala
Stephania forsteri (DC.) A.Gray -- Samoan name: laui'atolo
Syzygium spp. -- Samoan name: nonu togi, Samoan name: seasea toto
Syzygium corynocarpum (A.Gray) C.Muell. -- Samoan name: seasea
Syzygium inophylloides (A.Gray) C.Muell. -- Samoan name: asi
Syzygium malaccense (L.) Merr. et Perry -- Samoan name: nonu fi'afi'a
Syzygium neurocalyx (A.Gray) Christoph. -- Samoan name: fena
Syzygium samarangense (Bl.) Merr. et Perry -- Samoan name: nonu 'ai

Tacca leontopetaloides (L.) O.Kuntze -- Samoan name: mâsoâ
Tacca pinnatifida Forst. -- Synonym of Tacca leontopetaloides (L.) O.Kuntze
Tagetes erecta L. -- Samoan name: makerita
Tamarindus indica L. -- Samoan name: tamaligi
Tarenna sambucina (Forst.f.) Dur. ex Drake -- Samoan name: ma'anunu II
Terminalia spp. -- Samoan name: talie
Terminalia catappa L. -- Samoan name: talie
Terminalia cf. samoensis Rech. -- Samoan name: talie
Terminalia littoralis Seem. -- Samoan name: talie
Theobroma cacao L. -- Samoan name: koko
Thespesia populnea (L.) Sol. ex Corr. -- Samoan name: milo
Timonius forsteri DC. -- Samoan name: aloalo tane
Timonius inconspicuus Krämer -- Synonym of Timonius forsteri DC.
Tournefortia argentea L.f. -- Synonym of Argusia argentea (L.f.) Heine
Trema cannabina Lour. -- Samoan name: mâgele II
Trema orientalis (L.) Bl. -- Samoan name: mâgele II
Triumfetta procumbens Forst.f. -- Samoan name: mautofu tai

Urena lobata L. -- Samoan name: mautofu II
Urtica spp. -- Samoan name: ogoogo
Urtica interrupta L. -- Synonym of Laportea interrupta (L.) Chew
Usnea articulata Hoffm. -- Samoan name: limu mea