Flower image. Strong, M. T. 5501. Carolina Sandhills National Wildlife Refuge. Seepage in cut-over pine woodland, NE of trail and 0.97 km on trail from Angelus Road, GGI Gardens Project 2018
Flower image. Strong, M. T. 5358. South Quay Sandhills Preserve. Off of South Quay Road (SR189) at end of Wyanoke Trail (SR747). Southern end of road to Cherry Grove, GGI Gardens Project 2016.
Habit image. Strong, M. T. 5501. Carolina Sandhills National Wildlife Refuge. Seepage in cut-over pine woodland, NE of trail and 0.97 km on trail from Angelus Road, GGI Gardens Project 2018
The botany of the Antarctic voyage of H.M. discovery ships Erebus and Terror in the Years 1839-1843. v.1. plates
London :Reeve Brothers,1844-60.
biodiversitylibrary.org/page/13448436