Lathyrus stipulaceus (Pursh) Butters & H.St.John species proparte synonym

Vicia stipulacea Pursh species synonym

Orobus polymorphus (Nutt.) Alef. species synonym

Lathyrus decaphyllus var. incanus (J.G.Sm. & Rydb.) Broich variety accepted

Lathyrus polymorphus subsp. polymorphus subspecies synonym

Lathyrus decaphyllus var. decaphyllus variety accepted

Lathyrus stipulaceus var. incanus (J.G.Sm. & Rydb.) Butters & H.St.John variety synonym

Lathyrus polymorphus var. hapemanii (A.Nelson) C.L.Hitchc. variety synonym

Lathyrus ornatus var. incanus J.G.Sm. & Rydb. variety synonym

Lathyrus ornatus var. flavescens Rydb. variety synonym

Lathyrus incanus f. albidus E.H.Kelso form synonym

Lathyrus decaphyllus var. minor Hook. & Arn. variety synonym

Lathyrus polymorphus var. incanus (Sm. & Rydb.) Isely variety synonym

Lathyrus polymorphus var. incanus (J.G.Sm. & Rydb.) Dorn variety synonym

Lathyrus polymorphus Nutt. species heterotypic synonym

Lathyrus hapemanii A.Nelson species synonym

Lathyrus ornatus Torr. & A.Gray species synonym

Lathyrus polymorphus subsp. incanus (J.G.Sm. & Rydb.) C.L.Hitchc. subspecies synonym

Lathyrus incanus (J.G.Sm. & Rydb.) Rydb. species synonym

Lathyrus polymorphus var. polymorphus variety synonym

Lathyrus ornatus Nutt. species synonym

Lathyrus myrtifolius Spreng. species heterotypic synonym