Potamogeton nodosus is a species of aquatic plant known by the common names longleaf pondweed[2] and Loddon pondweed.[3] It is native to Eurasia and the Americas, where it is widespread and can be found in water bodies such as ponds, lakes, ditches, and streams. This is a perennial herb producing a thin, branching stem easily exceeding a meter in maximum length. The submerged leaves are linear to widely lance-shaped and up to 15 by 4 centimetres (5.9 in × 1.6 in) in length and width, respectively, while the floating leaves achieve shorter maximum lengths and are ovate or elliptic.[4] Both floating leaves and submerged leaves are borne on long petioles, a distinguishing characteristic. The inflorescence is a spike of many small flowers arising from the water on a peduncle.
^Lansdown, R.V. (2017). "Potamogeton nodosus". IUCN Red List of Threatened Species. 2017: e.T164227A67791533. doi:10.2305/IUCN.UK.2017-1.RLTS.T164227A67791533.en. Retrieved 25 November 2023.
^USDA, NRCS (n.d.). "Potamogeton nodosus". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 13 October 2015.
^BSBI List 2007(xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
^Hellquist, C. Barre; Thorne, Robert F.; Haynes, Robert R. (2012). Jepson Flora Project (ed.). "Potamogeton nodosus Long-Leaved Pondweed". Jepson eFlora. Regents of the University of California. Retrieved 25 November 2023.
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verticillatum, M. spicatum, Ceratophyllum submersum, Potamogeton pectinatus, P. coloratus, P. gramineus, P. nodosus, P. pusillus, P. lucens, Ranunculus trichophyllus...
form †Jeletzkytes †Jeletzkytes brevis †Jeletzkytes dorfi †Jeletzkytes nodosus †Kepodactylus – type locality for genus †Kepodactylus insperatus – type...