. . . . . . . . . "Halictus ligatus" . . "Asclepias tuberosa" . . "Jen Knutson. 2016. Halictus ligatus associated species with names lookup Asclepias tuberosa. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/5257354> on 05 Apr 2018." . . . . "http://iNaturalist.org is a place where you can record what you see in nature, meet other nature lovers, and learn about the natural world." .