P. prolificum. - Color of sepals, green tipped with pink, giving a rosy hue to the flowers. Stem, rigid, much branched, prostrate or ascending, 1 to 4 feet long. Leaves, small, linear to lance-shaped, growing at the joints of the internodes which are short and sheathed with large, silvery ocrea. These become frayed and bristly. July to September.
A seashore plant, found from Maine to Florida.