Potamogeton pectinatus L.
  • Sp. Pl.: 127 (1753) 


This is a synonym of Stuckenia pectinata (L.) Börner

General Description

Submerged, aquatic perennial, with slender, cylindrical, much-branched stems 0.1-1(-4) m long. Leaves with a sheathing base united to stipule and giving a jointed appearance, blade linear to filiform, tapering to a fine point, often clustered above. Flowe

Rooted submerged aquatic with adventitious roots at the nodes of the horizontal shoots; rhizomes perennial, slender to very robust, terete, whitish, sometimes developing tubers filled with starch and surrounded by a scaly leaf at the end of the growing season (such tubers generally absent in tropical plants); stems annual to perennial, up to 4 m long and 0.5– 2 mm in diameter, filiform to relatively robust, terete, sometimes pink, usually richly branched. Submerged leaves bright green to olive green, sessile, (20– )30– 125(– 300) mm long, 0.2– 4 mm wide, 24– 200 times as long as wide, linear, canaliculate or flattened, straight at base, entire at margins, the narrower leaves acute to finely acuminate at apex, sometimes the broader leaves obtuse and mucronate; midrib bordered on each side by one to several air channels, lateral veins 1– 2 on each side, inconspicuous; stipules persistent, fused with the leaves for 8– 70 mm, forming a convolute and winged leaf base, ending in a free hyaline ligule, (3– )5– 15 mm long, obtuse, rounded or truncate, later disintegrating into fibres; intravaginal scales 0.4– 0.6 mm long; floating leaves always absent. Peduncles 20– 100(– 450) mm long, 1.5– 5(– 10) times as long as the fruiting spike, as thick as the stem, flexuous; spikes (4– )8– 14-flowered, with 2– 7 pairs or whorls of flowers, contiguous at first, later distant, or the upper groups ± contiguous, 13– 35(– 60) mm long when in fruit. Tepals orbicular to elliptical, 1– 3 mm long; anthers 0.8– 1.3 mm long; carpels 4; stigmas borne on a short but distinct style. Fruitlets brown,(2.5– )3.3– 4.7(– 5.1) mm long, 2– 3.6 mm broad, asymmetrically obovoid, ventrally nearly straight, dorsally very convex, hardly 3-keeled; beak 0.2– 0.6 mm long, ventral, rarely subventral. Stem anatomy: stele of four bundles, mostly oblong; endodermis of U-type; interlacunar bundles present (in 1 ± complete ring); subepidermal bundles few or absent; pseudohypodermis present, 1-(– 2)-layered. Fig. 2 (p. 6).

Habitat

Fresh or brackish water in rivers, pans or pools.

HAB. Lakes, rivers, irrigation canals, also in brackish and in polluted water; water depth up to 3 m; forming often extensive monospecific patches; also a serious water weed, often blocking the waterflow in irrigation and drainage canals; 350– 2300 m

Distribution

Kenya Lake Naivasha, Apr. 1938, Chandler 2270!

Namibia to Port Elizabeth, cosmopolitan.

Tanzania Upper Mugungu [Mgungu], 23 Oct. 1961, Greenway, Myles Turner & Harvey 10284!;

Uganda Lake Bunyonyi, Apr. 1945, Purseglove 1644!;

Kenya Lake Turkana, Ferguson’ s Gulf, 4 June 1951, McKay s.n.!

Uganda near Butiaba, Lake Albert, 8 Feb. 1912, Fries 2000!

Tanzania Kigoma, Lake Tanganyika, 31 Jan. 1953, Ross 1469!

Tanzania Ngorongoro Crater, Gaitokitoke Springs, 1956, Greenway 9063!;

Kenya Lake Turkana, SE bank, 20 March 1970, Bally s.n.!;

Uganda Nyakasura, near Fort Portal, crater lake, 4 Dec. 1934, G. Taylor 2336!;

Literature

Sp. Pl.: 127 (1753); K. Schum. in Engl., P.O.A. C: 93 (1895); A. Benn. in F.T.A. 8: 223 (1901) (excl. G. Don ); A. Benn. in J.L.S. 38: 23 (1907); Graebner in Z.A.E. 2: 42 (1910); Hagstr. in R.E. Fries, Wiss. Ergebn. Schwed.-Rhod.-Kongo-Exped.: 188 (1916); A. Peter in Abh. Ges. Wiss. Göttingen 13 (2): 18, 108 (1928), & in F.D.O.-A.: 113 (1929); Dandy in J.L.S. 50: 513, map fig. 1 (1937); Robyns & Tournay, F.P.N.A. 3: 14 (1955); Lind & Tallantire, F.P.U., ed 1: 194 (1962) & ed. 2: 194 (1972); Lisowski et al. in F.A.C., Potamogetonaceae: 3 (1978); U.K.W.F., ed. 2: 302, t. 134 (1994); Lye in Fl. Eth. & Eritr. 6: 19, fig. 176.1.1 (1997); Wiegleb & Kaplan in Folia Geobot. 33: 305 (1998); Cook, Aquat. Wetl. Pl. S. Afr.: 236, fig. 254 a-c (2004).

Distribution Map

 
  • Native distribution
  • Introduced distribution
Found in
  • Asia-Temperate Eastern Asia Korea
  • Western Asia Cyprus
  • Asia-Tropical Malesia Philippines
  • Sulawesi
  • Sumatera
  • Papuasia Solomon Is.
  • Australasia New Zealand New Zealand North
  • New Zealand South
  • Northern America Mexico Mexico Central
  • Mexico Gulf
  • Mexico Northeast
  • Mexico Northwest
  • Mexico Southwest
  • Pacific Southwestern Pacific New Caledonia
  • Southern America Caribbean Cuba
  • Western South America Ecuador
Introduced into
  • Pacific North-Central Pacific Hawaii

  Bibliography

  • 1 Timberlake, J.R. & Martins, E.S. (eds.) (2009). Flora Zambesiaca 12(2): 1-208. Royal Botanic Gardens, Kew.
  • 2 J.J. Symoens (2006) Potamogetonaceae. Flora of Tropical East Africa 0 (0)
  • 3 Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa: an annotated checklist. Strelitzia 14.: i-vi, 1-1231. National Botanical Institute, Pretoria.
  • 4 Kress, W.J., DeFilipps, R.A., Farr, E. & Kyi, D.Y.Y. (2003). A Checklist of the Trees, Shrubs, Herbs and Climbers of Myanmar. Contributions from the United States National Herbarium 45: 1-590.
  • 5 Nooteboom, , H.P. (ed.) (2002). Flora Malesiana 16: 1-224. Noordhoff-Kolff N.V., Djakarta.
  • 6 Chaudhary, S.A. (2001). Flora of the Kingdom of Saudi Arabia 3: 1-368. Ministry of Agriculture & Water, Riyadh.
  • 7 Dassanayake (ed.) (2000). A Revised Handbook to the Flora of Ceylon 14: 1-307. Oxford & IBH Publishing Co. PVT. LTD., New Delhi, Calcutta.
  • 8 Espejo Serena, A. & López-Ferrari, A.R. (2000). Las Monocotiledóneas Mexicanas una Sinopsis Florística 1(9-11): 1-337. Consejo Nacional de la Flora de México, México D.F..
  • 9 Jongbloed, M., Western, R.A. & Boer, B. (2000). Annotated Check-list for plants in the U.A.E.: 1-90. Zodiac Publishing, Dubai.
  • 10 Jørgensen, P.M. & León-Yánes, S. (eds.) (1999). Catalogue of the Vascular Plants of Ecuador: 1-1181. Missouri Botanical Garden Press, St. Louis.
  • 11 Wagner, W.L., Herbst, D.R. & Sohmer, S.H. (1999). Manual of the Flowering Plants of Hawai'i. Revised Edition, Volume 2. Special Publications; Bernice Pauahi Bishop Museum 97: 989-1919.
  • 12 Edwards, S., Demissew, S. & Hedberg, I. (eds.) (1997). Flora of Ethiopia and Eritrea 6: 1-586. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
  • 13 Lee, W.T. (1996). Lineamenta Florae Koreae: 1-1688. Soul T'ukpyolsi: Ak'ademi Sojok.
  • 14 Boulos, L. (1995). Flora of Egypt Checklist: i-xii, 1-287. Al Hadara Publishing, Cairo.
  • 15 Karthikeyan, S., Jain, S.K., Nayar, M.P. & Sanjappa, M. (1989). Florae Indicae Enumeratio: Monocotyledonae: 1-435. Botanical Survey of India, Calcutta.
  • 16 Townsend, C.C. & Guest, E. (eds.) (1985). Flora of Iraq 8: 1-440. Ministry of Agriculture & Agrarian Reform, Baghdad.
  • 17 Bosser, J. & al. (1984). Flore des Mascareignes 191-201: IRD Éditions, MSIRI, RBG-Kew, Paris.
  • 18 Healey, A.J. & Edgar, E. (1980). Flora of New Zealand 3: 1-220. R.E.Owen, Government Printer, Wellington.
  • 19 Hara, H., Stearn, W.T. & Williams, H.J. (1978). An Enumeration of the Flowering Plants of Nepal 1: 1-154. Trustees of British Museum, London.
  • 20 Moore, L.B. & Edgar, E. (1970). Flora of New Zealand 2: 1-354. R.E.Owen, Government Printer, Wellington.
  • 21 Sachet, M.-H. (1962). Flora and vegetation of Clipperton island. Proceedings of the California Academy of Sciences , IV, 31: 249-307.
  • 22 Andrews, F.W. (1956). The Flowering Plants of the Sudan 3: 1-579. T.Buncle & co., LTD., Arbroath, Scotland.
  • 23 Jumelle, H. (1950). Flore de Madagascar et des Comores 21-22: Firmin-Didot & C, Paris.
  • 24 Guillaumin, A. (1948). Flore Analytique et Synoptique de la Nouvelle-Calédonie: 1-369. Office de la recherche scientifique coloniale.
  • 25 Leon, H. (1946). Flora de Cuba 1: 1-441. Cultural S. A., La Habana.

 Information From

Flora of Tropical East Africa
http://apps.kew.org/efloras/
Flora of Tropical East Africa. Published on the Internet; http://apps.kew.org/efloras/
Strelitzia 30
http://www.sanbi.org/biodiversity-science/science-policyaction/biodiversity-information-management/sanbi-publishing
Strelitzia 30: Plants of the Greater Cape Floristic Region volume 2: The Extra Cape Flora. Edited by D.A. Snijman (2013)
World Checklist of Selected Plant Families
http://apps.kew.org/wcsp/
WCSP 2014. 'World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://apps.kew.org/wcsp/ Retrieved 2011 onwards
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