Calystegia longipes
Valley Center, CA
Nov. 2005

Calystegia soldanella
Big Lagoon, CA
July 2004

Calystegia soldanella

Mendocino Co., CA
Perdue 9705, 23 Aug 1969

Convolvulus arvensis
Tehama Co., CA
Spjut & Casterline 15327, May 2003
Photo by Susan Casterline

Convolvulus arvensis
Tehama Co., CA
Spjut & Casterline 15327, May 2003

Sowemimo B. O. and N. R. Farnsworth. 1973. Phytochemical investigation of Convolvulus arvensis (Convolvulaceae). J. Pharm. Sci. 62(4): 678–679.