6¢ Botanical Congress - Pack of 25 unused stamps from 1969
15¢ American Trees - Pack of 25 unused stamps from 1978
29¢ Spring Garden Flowers - Pack of 25 unused stamps from 1993
34¢ Carnivorous Plants - Pack of 25 unused stamps from 2001
32¢ Winter Garden Flowers - Pack of 25 unused stamps from 1996
33¢ Tropical Flowers - Pack of 25 unused stamps from 1999
33¢ Berries - Pack of 25 unused stamps from 1999
