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| the leaf shape is called deltoid (like the triangular-shaped Greek letter delta), which is where the epithet deltoides comes from. What kind of leaf margin is present? | branch with young leaves and the trunk of a small Populus deltoides (in the background) |
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| habit--cottonwoods can grow quite large and fast (up to 5 feet of growth per year!). They are always found by a permanent water source, usually by rivers in riparian zones | Cottonwoods have the peculiar characteristic of 2-5 fingerlike projections (glands) at the point where the leaf blade meets the petiole |
