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How do palm trees grow tall without branching along most of their trunks?

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Tall giant sequoia trees with reddish bark and thick trunks rise closely together in a dense forest at Sequoia National Park, California. — Tree A stand of giant sequoia trees (*Sequoiadendron giganteum*) in Sequoia National Park, California.

Palm trees do not branch along their trunks because they possess only a single growing point, unlike many other woody plants. While some rare exceptions exist that exhibit a forking habit, the vast majority of palms grow as a single, erect stem.12

Furthermore, palms lack a cambium layer—the tissue responsible for secondary growth in typical trees—which means they cannot increase the girth of their trunks through new cell production as they age. Instead, a palm typically reaches its maximum diameter during an initial "establishment growth" phase, often while the stem is still below ground, before it begins to grow upward. Because they lack the ability to thicken their trunks over time, their structural integrity relies on a unique internal composition of conducting strands scattered throughout softer ground tissue rather than a solid woody cylinder.21