U.S. #1942-45
1981 20¢ Desert Plants
Issue Date: December 11, 1981
City: Tucson, AZ
Quantity: 47,890,000
Printed By: Bureau of Engraving and Printing
Printing Method: Lithographed and engraved
Perforations: 11
Color: Multicolored
The four stamps each feature a different plant. The Barrel Cactus (Ferocactus wislizeni) and the Beavertail Cactus (Opuntia basilaris) represent two of the most recognizable members of the cactus family. The Agave (Agave deserti) - though often mistaken for a cactus - belongs to its own plant family and is depicted in its distinctive blue-green rosette form. Completing the set is the Saguaro (Cereus giganteus), the iconic giant of the Sonoran Desert that can grow to 60 feet tall and weigh more than three tons.
All four plants are succulents, meaning they store water in their fleshy tissues as an adaptation to the extreme heat and scarce rainfall of the desert environment. The stamps are most often collected as a se-tenant block of four, which preserves the intended design relationship between the stamps.
U.S. #1942-45
1981 20¢ Desert Plants
Issue Date: December 11, 1981
City: Tucson, AZ
Quantity: 47,890,000
Printed By: Bureau of Engraving and Printing
Printing Method: Lithographed and engraved
Perforations: 11
Color: Multicolored
The four stamps each feature a different plant. The Barrel Cactus (Ferocactus wislizeni) and the Beavertail Cactus (Opuntia basilaris) represent two of the most recognizable members of the cactus family. The Agave (Agave deserti) - though often mistaken for a cactus - belongs to its own plant family and is depicted in its distinctive blue-green rosette form. Completing the set is the Saguaro (Cereus giganteus), the iconic giant of the Sonoran Desert that can grow to 60 feet tall and weigh more than three tons.
All four plants are succulents, meaning they store water in their fleshy tissues as an adaptation to the extreme heat and scarce rainfall of the desert environment. The stamps are most often collected as a se-tenant block of four, which preserves the intended design relationship between the stamps.