. . . . . . . . . "Polystichum acrostichoides" . . "Trillium erectum" . . "Charlie Hohn. 2013. Polystichum acrostichoides associated species with names lookup Trillium erectum. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/331498> 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." .