References for Malvaceae
Kearney, T.H. 1951. The American genera of Malvaceae. Amer. Midl. Nat. 46:93-131.
Kearney, T.H. 1935. The North American species of Sphaeralcea subgenus Eusphaeralcea. Univ. Calif. Publ. Bot. 19:1-128.

Source for the Reference Lists

George W. Douglas, Del Meidinger and Jim Pojar. 1998-2002. Illustrated Flora of British Columbia.