Species: Potamogeton obtusifolius
Encyclopedia of Puget Sound
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 on long-stalked, narrow, interrupted spikes in the axils of the upper leaves. The flowers consist only of the stamens and an ovary; there are no petals or sepals. The achene is oval in outline, 3-4 mm long, and compressed with a keel on the outer edge.
Classification
Monocotyledoneae
Najadales
Potamogetonaceae
Potamogeton
NatureServe
Classification
Ecology and Life History
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 on long-stalked, narrow, interrupted spikes in the axils of the upper leaves. The flowers consist only of the stamens and an ovary; there are no petals or sepals. The achene is oval in outline, 3-4 mm long, and compressed with a keel on the outer edge.