Lathyrus decaphyllus Pursh var. incanus (Smith & Rydberg) Broich. Hoary Vetchling. Phen: May-Jul. Hab: Prairies. Dist: NE south to sc. OK and CO.
Origin/Endemic status: Native
Synonymy: = K4; = Lathyrus polymorphus Nutt. ssp. incanus (Sm. & Rydb.) C.L.Hitchc. – Tx; = Lathyrus polymorphus Nutt. var. incanus (Sm. & Rydb.) Dorn – Isely (1998)
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