Plant life - American Plant Life Society. (American Plant Life Society, 1953)

Plant life - American Plant Life Society. (American Plant Life Society, 1954)

Plant life - American Plant Life Society. (American Plant Life Society, 1955)

Plant life - American Plant Life Society. (American Plant Life Society, 1956)

Plant life - American Plant Life Society. (American Plant Life Society, 1957)

Plant life - American Plant Life Society. (American Plant Life Society, 1958)

Plant life - American Plant Life Society. (American Plant Life Society, 1959)

Plant life - American Plant Life Society. (American Plant Life Society, 1971)

Plant life - American Plant Life Society. (American Plant Life Society, 1972)

Plant life - American Plant Life Society. (American Plant Life Society, 1973)

Plant life - American Plant Life Society. (American Plant Life Society, 1974)

Plant life - American Plant Life Society. (American Plant Life Society, 1975)

Plant life - American Plant Life Society. (American Plant Life Society, 1976)