Fennel pondweed Potamogeton pectinatus, copyright Christian Fischer.

Belongs within: Potamogetonales.

The Potamogetonaceae are a cosmopolitan group of aquatic herbs, often bearing a combination of narrow submerged and broader floating leaves.

Characters (from Healy & Edgar 1980): Aquatic perennial herbs of brackish or fresh water. Leaves simple, usually alternate, often dimorphic, submersed ones narrower and more delicate than floating ones; in axil, a delicate membranous stipule, either free or adnate below. Inflorescence a many-flowered spike; peduncle axillary with 0, 1 or 2 bracts at base. Flowers small, green, bisexual, actinomorphic, without bracteoles, segments 4, free, valvate, concave. Stamens 4, on claw of segments; anthers 2-celled, apparently sessile, extrorse. Carpels 4, sessile, free, superior; stigma sessile or nearly so; ovule solitary, strongly curved. Achenes drupe-like when fresh; endocarp stony, splitting by separation of vertically-oriented operculum on outer face.

<==Potamogetonaceae [Potamogetonineae]
    |--Diplanthera YY22
    |--Althenia YY22
    |--Groenlandia HE80
    |--Phyllospadix YY22
    |    |--P. iwatensis B79
    |    `--P. scouleri CH97
    `--Potamogeton Linnaeus 1753 ME70
         |  i. s.: P. amplifolius B97
         |         P. berchtoldii CS77
         |         P. compressus C55
         |         P. crispus Linnaeus 1753 HE80
         |         P. drummondii GK00
         |         P. fluitans C55
         |         P. gramineus CS77
         |         P. lucens C55
         |         P. natans DS04
         |         P. nodosus PP07
         |         P. obtusifolius C06
         |         P. octandrus LK14
         |         P. perfoliatus C55
         |         P. polygonifolius ME70
         |         P. pusillus C55
         |         P. richardsonii DS04
         |         P. robinsii B97
         |         P. tricarinatus GK00
         |--P. subg. Potamogeton ME70
         |    |--P. cheesemanii Bennett 1883 ME70 (see below for synonymy)
         |    |--P. ochreatus Raoul 1844 ME70
         |    `--P. suboblongus Hagström 1916 ME70
         `--P. subg. Coleogeton KG01
              |--P. × bottnicus [P. pectinatus × P. vaginatus] KG01
              |--P. filiformis KG01
              |--P. pectinatus Linnaeus 1753 ME70
              |--P. × suecicus [P. pectinatus × P. filiformis] KG01
              `--P. vaginatus KG01

Potamogeton cheesemanii Bennett 1883 ME70 [incl. P. natans var. australis Kirk ex Bennett 1887 C06, P. membranaceus Hagström 1916 ME70, P. porrigens Hagström 1916 ME70]

*Type species of generic name indicated


[B97] Brown, K. M. 1997. Temporal and spatial patterns of abundance in the gastropod assemblage of a macrophyte bed. American Malacological Bulletin 14 (1): 27–33.

[B79] Buss, L. W. 1979. Habitat selection, directional growth and spatial refuges: why colonial animals have more hiding places. In: Larwood, G., & B. R. Rosen (eds) Biology and Systematics of Colonial Organisms pp. 459–497. Academic Press: London.

[C55] Candolle, A. de. 1855. Géographie Botanique Raisonée: Ou exposition des faits principaux et des lois concernant la distribution géographique des plantes de l’époque actuelle vol. 2. Librairie de Victor Masson: Paris.

[CH97] Castro, P., & M. E. Huber. 1997. Marine Biology 2nd ed. WCB McGraw-Hill: Boston.

[C06] Cheeseman, T. F. 1906. Manual of the New Zealand Flora. John Mackay, Government Printer: Wellington.

[CS77] Cramp, S., & K. E. L. Simmons (eds) 1977. Handbook of the Birds of Europe, the Middle East and North Africa: The Birds of the Western Palaearctic vol. 1. Ostrich to Ducks. Oxford University Press: Oxford.

[DS04] Davis, J. I., D. W. Stevenson, G. Petersen, O. Seberg, L. M. Campbell, J. V. Freudenstein, D. H. Goldman, C. R. Hardy, F. A. Michelangeli, M. P. Simmons, C. D. Specht, F. Vergara-Silva & M. Gandolfo. 2004. A phylogeny of the monocots, as inferred from rbcL and atpA sequence variation, and a comparison of methods for calculating jackknife and bootstrap values. Systematic Botany 29 (3): 467–510.

[GK00] Gibson, N., & G. J. Keighery. 2000. Flora and vegetation of the Byenup-Muir reserve system, south-west Western Australia. CALMScience 3 (3): 323–402.

[HE80] Healy, A. J., & E. Edgar. 1980. Flora of New Zealand vol. 3. Adventive cyperaceous, petalous and spathaceous monocotyledons. P. D. Hasselberg, Government Printer: Wellington (New Zealand).

[KG01] King, R. A., R. J. Gornall, C. D. Preston & J. M. Croft. 2001. Molecular confirmation of Potamogeton × bottnicus (P. pectinatus × P. vaginatus, Potamogetonaceae) in Britain. Botanical Journal of the Linnean Society 135 (1): 67–70.

[LK14] Lyons, M. N., G. J. Keighery, L. A. Gibson & T. Handasyde. 2014. Flora and vegetation communities of selected islands off the Kimberley coast of Western Australia. Records of the Western Australian Museum Supplement 81: 205–244.

[PP07] Pandey, R. P., & P. M. Padhye. 2007. Studies on phytodiversity of Arid Machia Safari Park-Kailana in Jodhpur (Rajasthan). Bulletin of the Botanical Survey of India 49 (1–4): 15–78.

[YY22] Yampolsky, C., & H. Yampolsky. 1922. Distribution of sex forms in the phanerogamic flora. Bibliotheca Genetica 3: 1–62.

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