The impressive showing of Spanish sub clovers may lead to wider use here for range and pasture in areas with low and variable rainfall.

Special acknowledgement is made to Carlos Gomez Pitera, Instituto Nacional de lnues-tigaciones Agrarias, for furnishing seed of the Spanish strains, and to Gary Reece and Elgy Kryger, Watershed Program, Department of Agriculture, San Diego County, for assistance in site preparation, encouragement and logistic support throughout the long evaluation program in San Diego County.

The authors wish to acknowledge Carol Adams for statistical analysis; Robert Slayback and Raimond F. Clary, Jr., of the US. Department of Agriculture Soil Conservation Service, for assistance in seed increase; and Robert Koenigs, formerly with UC Cooperative Extension in San Diego County, for sampling in early years.