Alpine pondweed

Family: pondweeds. Native range - the Alps.

With reddish floating leaves and an unbranched stem it retains, just in case, narrow submerged leaves up to 25 cm long. In P. gramineus the submerged leaves on a branched stem do not exceed 8 cm. A very variable species: when submerged it may completely lose its floating leaves, and when the water body dries it takes a terrestrial form with leathery leaves narrowed into petioles.