. . . . . . . . . "Malus fusca" . . "Celastrina echo" . . "Mike Patterson. 2011. Malus fusca associated species with names lookup Celastrina echo. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/5079667> 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." .