Tetramolopium arenarium subsp. laxum Lowrey (original description)
Tetramolopium consanguineum subsp. leptophyllum (Sherff) Lowrey (original description)
Tetramolopium consanguineum var. kauense Lowrey accepted as Tetramolopium consanguineum subsp. leptophyllum (Sherff) Lowrey (original description)
Tetramolopium filiforme var. polyphyllum (Sherff) Lowrey (original description)
Tetramolopium humile subsp. haleakalae Lowrey (original description)
Tetramolopium lepidotum subsp. arbusculum (A.Gray) Lowrey (original description)
Tetramolopium rockii var. calcisabulorum (H.St.John) Lowrey (original description)
Tetramolopium sect. Alpinum Lowrey (original description)
Tetramolopium sect. Sandwicense Lowrey (original description)
Tetramolopium sylvae Lowrey (original description)