American abstract painter born at Des Moines, Iowa. Studied at the University of Oklahoma, Drake University and the Des Moines Art Center (under George Grosz). Moved to New York in 1958. His earliest works, completed in 1959-62, were painted collages consisting of painted pieces of paper stapled onto joined sheets of plywood. Afterwards made pictures similar in appearance to the collages, but entirely painted and with straight as well as ragged edges. Began in 1963 with his 'Rotation' series to use a standardised geometrical compositional schema as the basis for a series of paintings each different in colour. Some of the compositions, suggesting overlapping, bending etc., were evolved with the aid of plywood and perspex reliefs. First one-man exhibition at the Kornblee Gallery, New York, 1964. His tendency in the late 1960s to use a large central area of colour led from 1972 to pictures with soft, uneven washes of colour and narrow, irregular colour borders. Lives in New York.
Ronald Alley, Catalogue of the Tate Gallery's Collection of Modern Art other than Works by British Artists, Tate Gallery and Sotheby Parke-Bernet, London 1981, p.770