The moisture content decreased from initial 60 ~ 70% to final 13% during theseed development of two varieties of tall fescue, Fawn and Safari. Seed fresh weight reached thepeak before the seed dry weight did and then fell, but dry weight increased slowly during the rapiddecline of seed water. The seed physfofogical maturity of Fawn and Safari occourred when themoisture content was 45. 3 % and 44. 1 % respectively. During the early stage of development ofFawn and Safari, starch accumulation increased rapidly...