FIVE POINTS, Calif., Jan. 21, 2011 /PRNewswire/ -- S&W Seed Company (Nasdaq: SANW) today announced that its proprietary, non-dormant, high yield alfalfa varieties marketed as "SW 9720" and "SW 9215" have been renamed "SW 9720S" and "SW 9215S." The added "S" will serve to distinguish and em