Acanthomintha duttonii (Abrams) Jokerst (San Mateo thornmint) is a federal and state endangered annual mint known from only one extant population in Edgewood County Park and Natural Preserve in San Mateo County, CA. This one population has been in decline for years. Pavlik and Espeland (1998) estimated over 53,000 individuals in 1994, and only 249 individuals were censused in 2008. A restoration project began in 2008 with the goal of conducting habitat enhancement experiments at the existing site, conducting habitat suitability surveys for potential introductions, collecting and banking seed from the existing population, and initiating a seed increase program that is in its fifth year. One major success of this project has been two years of seeding at Edgewood, resulting in a population high of 3,450 on May 24, 2011.
Details on the project can be found in the status updates below.