Correspondence 1 indicates that the Authors of Plant Names abbreviation for this author is G. W. Gillett. [Corrected from G. Gillett, originally in The Jepson Manual [Ed. 1], 4 Mar 2003.]
Correspondence 2 indicates that since The Jepson Manual [Ed. 2] Phacelia campanularia A. Gray subsp. vasiformis G. W. Gillett is to be treated as a synonym of Phacelia campanularia A. Gray var. vasiformis (G.W. Gillett) Walden & R.Patt..
