TY - JOUR AU - Kester, Dale E. AU - Asay, Richard N. TI - Germplasm sources of almond JF - California Agriculture JO - Calif Agr Y1 - 1977/09/01 VL - 31 IS - 9 SP - 20 EP - 21 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v031n09p20 AB - The almond is a uniquely California crop and 99 percent of U.S. product occurs here. Germplasm materials in California originated as chance seedlings from seeds and plants imported from the Mediterranean region between 1850 and 1900. The basic cultivars Nonpareil, Texas Prolific (now known as Mission), Ne Plus Ultra, Peerless, Drake, and I.X.L. originated with this material.