potamogeton crispus, curled pondweed, curly-leaf pondweed in fresh water lake

vein curls underwater curly curled growth america vertical michigan aquatic photography brownish fibrous north herb stems species eurasia perennial botany design pattern leaf beauty green water nature inland plant fresh crispleaved crispus curlyleaf hydrophyte margins noxious pondweed potamogeton rhizomatous serrated