Walter Morton Sabine, 73, the general manager of Paul's Wholesale Florist and a former president of two trade associations in the Washington area, was found dead Sept. 9 at his home in Clarksville, Md. He had a heart ailment.

Mr. Sabine was born in Omaha, Neb., and grew up in the Washington area. He graduated from Rockville High School and the Columbus University law school.

He began his career with flowers in 1932 with the Blackistone firm in Washington. He joined Paul's when it was founded in 1937 and remained there as general manager until his death.

Mr. Sabine was a founder and president of the Wholesale Florists Association of Washington and the Allied Florists Association of Greater Washington. In the 1950s, he was a member of the executive committee and the advisory board of the National Capital Flower and Garden Show.

His wife, Vera, died in 1965.

Survivors include four daughters, Jean White of Clarksville, Vera Road of Ocala, Fla., Barbara Sabine of San Jose, Calif., and Marian Sabine of Woodbine, Md.; two sons, Leslie R., of Clarksville, and Paul D., of Sykesville, Md., two sisters, Eleanor Adamson of Brookeville, Md., and Betty Parlor of Alexandria, and six grandchildren.