Apr 19, 2012
Potamogeton obtusifolius
Blunt-leaved Pondweed is an aquatic, rhizomatous perennial with slender, submergent, or floating stems that are up to 100 cm long. The leaves are linear, 3-10 cm long, and 2-4 mm wide, each with a small round gland on either side at the base. There is a white-membranous leaf stipule that surrounds the stem above the point where the leaf diverges. Herbage is glabrous. The minute flowers are borne...