Peltate: Having a centrally attached stalk or petiole like an umbrella.*
The leaf stalk of mayapples (Podophyllum peltatum) is attached in the middle of the leaf, rather than at the leaf margin. Some other plants with peltate leaves are water lotus (Nelumbo) and nasturtium (Tropaeolum).
*Pell, S.K., Angell, B. (2016). A botanist’s vocabulary: 1300 terms explained and illustrated. Portland: Timber Press.