leaves

Image of a leaf with multiple leaflets arranged along a central stalk → Odd pinnately compound – Leaflets arranged along both sides of a rachis with a single terminal leaflet; compound leaf.

Image of a leaf with paired leaflets but no terminal leaflet → Even pinnately compound – Leaflets occur in pairs along a rachis without a terminal leaflet.

Image of a leaf with leaflets radiating from one point → Palmately compound – Leaflets arise from a single point like fingers from a palm.

Image of a leaf with lobes radiating from one central point → Palmately lobed – Lobes spread from a single point near the leaf base.

Image of an oak-type leaf with lobes extending along the sides of a main midrib → Pinnately lobed – Lobes arranged along both sides of the midrib.

Image showing two leaves directly opposite each other on a stem → Opposite leaf attachment – Two leaves arise from the same node on opposite sides of the stem.

Image showing leaves alternating up a stem → Alternate leaf attachment – Single leaves arise from each node, alternating sides along the stem.

Image showing three or more leaves emerging from the same node → Whorled leaf attachment – Three or more leaves arranged in a circular pattern around the stem at a single node.

Image showing a leaf connected to a stem by a small stalk → Petiole – The stalk that attaches the leaf blade to the stem.

Image highlighting the area between lobes of a leaf → Sinus – The indentation or space between lobes on a leaf margin.

Image highlighting the projections on a lobed leaf → Lobe – The rounded or pointed projections on a leaf margin separated by sinuses.

Image of a leaf with veins spreading from a single point → Palmate venation – Major veins radiate from one point at the leaf base.

Image of a leaf with one main midrib and smaller veins branching off → Pinnate venation – Secondary veins branch out from a single central midrib.

Image of a leaf with smooth, un-toothed edges → Entire margin – Leaf margin is smooth without serrations or teeth.

Image of a leaf with sharp teeth pointing forward along its edge → Serrate margin – Margins have teeth that point toward the leaf apex.

Image of a leaf with rounded lobes and wave-like margins → Sinuate margin – Leaf margin has gentle, wavy curves.

Image of a leaf with double rows of fine teeth → Double serrate margin – Margin has smaller serrations on larger serrations.

Image of a heart-shaped leaf → Cordate leaf shape – Leaf base is broad and rounded with a notch, resembling a heart.

Image of an egg-shaped leaf, broadest below the middle → Ovate leaf shape – Egg-shaped with widest point below the center.

Image of a narrow, tapering leaf longer than wide → Lanceolate leaf shape – Long and narrow with the widest point below the middle.

Image of an inverted egg shape, broadest near the tip → Obovate leaf shape – Reverse of ovate; broadest above the middle.

Image of a leaf base that tapers gradually → Cuneate base – Narrow, wedge-shaped leaf base.

Image of a leaf base that appears flat or squared off → Truncate base – Leaf base is straight or flat at the bottom.

Image of a leaf base that curves smoothly into the petiole → Rounded base – Leaf base with a gentle curve joining the petiole.