Ascending Purple Milk-Vetch
Stipules Opposite Petiole
Oro Lake Regional Park
This picture shows the stipules connate on the side of the stem opposite to the petiole attachment point. The stipules will often split in the connate region, so you may have to search for an example where the stipules are as intact as in this photo.
Budd's Flora and Flora of Alberta refer to this species as A. striatus, and that is the name used in the notes below.
Striatus: Answers to key questions in Budd's Flora and Flora of Alberta leading to this species.
Astragalus: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus. Not all the answers apply to all members of Astragalus found in the Canadian prairies, but they all do apply to this species.
Leguminosae: Answers to key questions in Budd's Flora leading to this family.