Silphium compositum var. compositum Michx.,

Thornhill, Robert, Krings, Alexander, Lindbo, David & Stucky, Jon, 2014, Guide to the Vascular Flora of the Savannas and Flatwoods of Shaken Creek Preserve and Vicinity (Pender & Onslow Counties, North Carolina, U. S. A.), Biodiversity Data Journal 2, pp. 1099-1099: 1099

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Silphium compositum var. compositum Michx.


Silphium compositum var. compositum Michx. 


Pine savannas.


May–Sep. Not seen in Shaken Creek Preserve by the senior author. Specimens seen in the vicinity: Sandy Run [Hancock]: Taggart SARU 470 (WNC!). [< Silphium compositum Michx. var. compositum  sensu RAB; < Silphium compositum  Michx. sensu FNA; = Weakley]