. . . . . . . . . "Osmia lignaria propinqua" . . "Berberis aquifolium" . . "Steve Wells. 2017. Osmia lignaria propinqua associated species with names lookup Berberis aquifolium. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/6133487> 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." .