What are the spiky seeds?

What are the spiky seeds?

Trees with Spiky Seed Pods. If you’ve encountered some round, spiny balls under a tree or maybe still on the plant, and you’re wondering what it could be, it’s likely one of several options: buckeye/horsechestnut (Aesculus), chestnut (Castanea), or sweet gum (Liquidambar styraciflua)

What are the spiky balls called?

Additionally, the sweet gum’s spiky gum balls hang conspicuously from the tree’s smaller branches, sometimes all winter. These compound seed capsules are often confused with the seed heads of the American sycamore, or its London plane-tree hybrid, but the two are only superficially similar.

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