Guide to the Vascular Flora of the Savannas and Flatwoods of Shaken Creek Preserve and Vicinity (Pender & Onslow Counties, North Carolina, U. S. A.) Author Thornhill, Robert Author Krings, Alexander Author Lindbo, David Author Stucky, Jon text Biodiversity Data Journal 2014 2 1099 1099 http://dx.doi.org/10.3897/BDJ.2.e1099 journal article http://dx.doi.org/10.3897/BDJ.2.e1099 1314-2828-2-1099 Ludwigia linearis Walter Distribution Wet pine savannas (SPS-T, SPS-RF), borrow pits. Notes Infrequent. Jun-Sep . Two varieties are recognized by Weakley (2012) : var. Ludwigia linearis linearis , with the cells of the seed surface oriented parallel to the long axis of the seed, and var. Ludwigia linearis puberula Engelm. & A. Gray, with the cells of the seed surface oriented irregularly or elongated perpendicularly to the long axis of the seed. This character, best seen at ≥ 20 x magnification, is the only non-overlapping morphological character that distinguishes the two varieties. If varieties are recognized, the specimens collected by the senior author would be referable to var. Ludwigia linearis linearis . A specimen collected from Sandy Run [Hancock] (Taggart SARU 379, WNC) has been reported as var. Ludwigia linearis puberula ( Taggart 2010 ). Thornhill 30, 941, 1117, 1203 (NCSC). [= RAB;> Ludwigia linearis Walter var. linearis , Ludwigia linearis Walter var. puberula Engelm. & A. Gray sensu Weakley]