in no way mentioned in Munz, Munz Supplement, Munz Southern California Flora, The Jepson Manual [Ed. 1]; as Polygonum triandrous, indicated for California in protologue; treated as synonym of Polygonum douglasii subsp. johnstonii in Kartesz & Meacham
Correspondence and Comments Subsequent to Initial Analysis
Correspondence 1 indicates that Hickman, The Jepson Manual [Ed. 1] author, had treated Polygonum triandrum Coolidge as synonym of Polygonum douglasii subsp. johnstonii before The Jepson Manual [Ed. 1] (in Madrono 31:250, 1984).
Correspondence 2 indicates that for The Jepson Manual [Ed. 2] Polygonum triandrum Coolidge is to be treated as a synonym of Polygonum sawatchense Small subsp. sawatchense.