''Potamogeton amplifolius'', commonly known as largeleaf pondweed or broad-leaved pondweed, is an
aquatic plant of
North America. It grows in water bodies such as lakes, ponds, and rivers, often in deep water.
This perennial plant grows from
rhizomes and produces a very slender, cylindrical, sometimes spotted stem up to a meter or so long. The leaves take two forms. Submersed leaves are up to 20 centimeters long by 7 wide and may be folded along their midribs. The submersed leaves have more veins than do those of other
pondweed
Pondweed refers to many species and genera of aquatic plants and green algae:
*''Potamogeton'', a diverse and worldwide genus
*''Elodea'', found in North America
*''Aponogeton'', in Africa, Asia and Australasia
*''Groenlandia
''Groenlandia'' is ...
species, up to 49.
Floating leaves are up to 10 centimeters long by 5 wide, leathery in texture, and borne on long
petioles. The
inflorescence
An inflorescence is a group or cluster of flowers arranged on a Plant stem, stem that is composed of a main branch or a complicated arrangement of branches. Morphology (biology), Morphologically, it is the modified part of the shoot of sperma ...
is a spike of many flowers rising above the water surface on a thick
peduncle.
References
External links
Jepson Manual TreatmentWashington Burke Museum
amplifolius
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