phyll(o)-

Leaf.

Greek phullon, leaf.

Examples include phylloclade, a flattened branch or stem-joint resembling and functioning as a leaf; phyllotaxis, the arrangement of leaves on an axis or stem; phylloxera (Greek xēros, dry), a plant louse that is a pest of vines; phylloquinone, one of the K vitamins, found in cabbage, spinach, and other leafy green vegetables.