08/09/2026
Why do bald cypress trees grow those unique wooden knees?
Cypress knees are woody structures that rise from the roots around bald cypress trees. They are especially noticeable in swamps, floodplains, and along the edges of lakes and rivers.
Scientists have proposed several possible purposes for these unusual structures. They may help stabilize large trees in soft, waterlogged soil, assist with the movement of air to submerged roots, store nutrients, or perform several functions at once. Their exact role is still not completely understood.
Bald cypress trees are also unusual because they are deciduous conifers. They produce cones, but unlike most familiar cone-bearing trees, they lose their soft, feathery leaves during the cooler months.
These trees are built for flooded environments. Their wide, buttressed trunks and extensive root systems help them remain standing in wet soil, while their branches provide habitat for birds, reptiles, insects, and epiphytic plants.
Some bald cypress trees can live for many centuries, quietly surviving generations of floods, droughts, hurricanes, and human history.
What do cypress knees look like to you when you see them rising from the water?
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