Knowra Palmate leaf Palmate leaf A leaf whose lobes or leaflets radiate from one point, resembling fingers spreading from a palm. The term describes both simple leaves with radiating lobes and compound leaves with radiating leaflets.
Leaf : A plant organ that captures light, exchanges gases, and often produces sugars through photosynthesis. Palmate shape is one way a leaf's blade or leaflets are arranged.
Pinnate leaf : A compound leaf whose leaflets attach along both sides of a central axis. Its leaflets line up along a rachis instead of radiating from one point.
Maple : A tree or shrub in the genus Acer, many species of which have palmately lobed leaves. Maple leaves are a recognizable example of a simple blade with radiating lobes.
Palmate venation : A leaf-vein pattern in which several major veins radiate from the blade's base. The same radiating geometry often accompanies palmate lobes, though shape and venation are distinct traits.
Leaf blade : The broad, usually flat part of a leaf, also called the lamina. In a simple palmate leaf, the blade is divided into radiating lobes.
Pinnate venation : A vein pattern in which secondary veins branch from a central midrib. Palmate venation spreads from the blade's base, unlike this midrib-centered pattern.
Horse chestnut : A tree in the genus Aesculus, with large compound leaves whose leaflets radiate from one point. Its foliage demonstrates the compound palmate form.
Leaf morphology : The study and description of leaf form, structure, and variation. Palmate describes one recurring pattern within the broader vocabulary of leaf shape.
Leaflet : A subdivision of a compound leaf that resembles a small leaf but lacks an axillary bud at its base. Compound palmate leaves consist of leaflets attached at one point.
Simple leaf : A leaf with one undivided blade, which may have lobes but is not divided into separate leaflets. Deeply lobed palmate leaves can resemble compound leaves, but their blade remains connected.
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