In a frond which is pinnate (feather-shaped), each leafy segment of the blade is called a pinna (plural pinnae), the stalk bearing the pinna is termed a petiolule, and the main vein or mid-rib of the pinna is referred to as a costa

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Some fronds are not pinnately compound (or simple), but may be palmate, costapalmate, or bifurcate.
There is a spectrum from costapalmate to palmate. Costapalmate fronds are shaped like the palm of a hand and have a short midrib or costa. Palmate

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Fern fronds often bear sporangia, where the plant's spores are formed, usually on the underside (abaxial surface) of the pinnae, but sometimes marginally or scattered over the frond.

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Fern fronds, as with all leaves, arise from the stem, either directly, or on an outgrowth from the stem termed a phyllopodium.

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The palm frond has been a symbol of victory, triumph, peace, and eternal life originating in the ancient Mediterranean world. For example, in some Christian traditions, during Palm Sunday, Jesus’ entrance into Jerusalem is celebrated by carrying palm leaves.

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• Fern sports – fronds that show marked change from the normal type as a result of mutation
• Acacia filicifolia – a tree whose compound leaves

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Fronds may describe several "frondose" structures in non-plant organisms -- such as the entire bodies of thalloid organisms, or the superficially leaf-like structures developed by some animals and fungi. Examples include frondose colonial bryozoans,

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