10 Aug 2009 e-mail from Margriet Wetherwax, including forwarded information from Dieter H. Wilken, author of Ceanothus for The Jepson Manual [Ed. 2] see Comment 1
Correspondence 1 indicates that for The Jepson Manual [Ed. 2] Ceanothus integerrimus Hook. & Arn. var. peduncularis Jeps. is to be treated as a synonym of Ceanothus integerrimus Hook. & Arn. var. macrothyrsus (Torr.) G. T. Benson.