Taxodium distichum

The bald cypress, known scientifically as *Taxodium distichum*, is a remarkable deciduous conifer.

While most conifers keep their needles year-round, this species sheds them annually. It belongs to the Cupressaceae family and is native to the Southeastern United States. This tree is exceptionally hardy and can adapt to many different environments. It grows well in wet swamps, salty coastal areas, and even dry soils. Because it can handle various soil types, from sandy to heavy clay, it is often planted in public spaces. In 1963, the state of Louisiana officially designated the bald cypress as its state tree.

The reproductive process of the bald cypress is quite specialized. The tree is monoecious, meaning it carries both male and female reproductive structures, called strobili, on a single plant. These structures form from buds in the late autumn. Pollination occurs in the early winter, and the structures take about 12 months to reach maturity. The male cones appear as small, purplish, drooping tassels called panicles. The female cones are globular and resinous. When they are young, these female cones are green, but they turn hard and brown as they mature. Each cone contains between 20 and 40 large seeds. These seeds are the largest of any species within the Cupressaceae family.

The life cycle of the tree involves specific seasonal stages. In the spring, specifically around April, the tree produces its cones. By October, the seeds are ripe and ready for dispersal. The cones eventually disintegrate to release the seeds into the environment. Some seeds are produced every single year, though the tree often produces much heavier crops every three to five years. Dissemination often happens through water, as floodwaters carry the scales or entire cones along streams. Wildlife also plays a role; squirrels frequently eat the seeds but often drop scales with undamaged seeds still attached.

For a new seedling to survive, the conditions must be just right. Germination typically occurs on wet surfaces like sphagnum moss or muck. Interestingly, seeds will not germinate if they are completely underwater, though they can remain viable under water for up to 30 months. A period of one to three months of saturated soil is necessary after the seeds fall. Once they sprout, the seedlings must grow quickly enough to keep their crowns above rising floodwaters. If a seedling is completely submerged for too long, it will die. In nursery settings, growers often use cold stratification or 60-day water submergence to help overcome internal dormancy in the seeds.

The history of these trees reveals their incredible longevity. Some specimens have lived for thousands of years. A famous tree in Florida, known as "The Senator," was estimated to be 3,500 years old before it burned down in 2012. In North Carolina, a tree found along the Black River is at least 2,624 years old, making it the oldest living tree in eastern North America. In Louisiana, the National Champion Bald Cypress is estimated to be approximately 1,500 years old. Researchers have even found trees in the Black River area that date back to 605 BC, which would make them among the ninth-oldest trees in the world.

The geographic range of the bald cypress is quite broad. It extends from southeastern New Jersey south to Florida, and west to Central Texas and southeastern Oklahoma. It also reaches inland along the Mississippi River to Illinois and Indiana. While they were once thought to only reach as far north as Delaware, researchers discovered a natural forest on the Cape May Peninsula in New Jersey. Beyond its native range, the species has been found growing in New York and Pennsylvania. Even more surprising is an underwater forest discovered by divers near Mobile, Alabama. These trees, located 60 feet deep, may be more than 50,000 years old, dating back to the last ice age.

Humans have long valued the bald cypress for its unique physical properties. The heartwood, which is the dense center of the tree, is highly resistant to rot. This makes the timber an excellent choice for items that must endure moisture. People use bald cypress to manufacture fence posts, doors, flooring, and even caskets. Physically, the tree is quite large and grows slowly. It can reach significant heights, such as a specimen in Virginia that measured 44.11 meters. Many trees also feature "cypress knees," which are woody structures that grow from the roots around the main trunk. This combination of durability and massive size makes the bald cypress a vital part of many ecosystems.