:33.A. "Potamogeton crispus" L. - "Curly pondweed" ::A part of the plant; ::#Flower; ::#Stamen with petal; ::#Fruit; ::#Individual fruit cut lengthwise to show the curved embryo. 4X. :34.B. "Potamogeton perfoliatus" L. - "Claspingleaf pondweed"