Potamogeton schweinfurthii A.Benn.

This species is accepted, and its native range is Africa, Medit. to Iran and Arabian Peninsula.

[FWTA]

Potamogetonaceae, F. N. Hepper. Flora of West Tropical Africa 3:1. 1968

Morphology General Habit
Submerged aquatic
Morphology Leaves
Very thin rather large leaves.

[FTEA]

Potamogetonaceae, J.J. Symoens. Flora of Tropical East Africa. 2006

Morphology General Habit
Rooted aquatic herb, with submerged and floating leaves.
Vegetative Multiplication Rhizomes
Rhizomes perennial, slender, terete,white, with apical winter buds.
Morphology Leaves
Submerged leaves almost always present, the young ones yellow- green or brownish, the old ones bright green or dark olive-green, often with a reddish or brownish tinge, sessile to shortly petiolate, often incrusted with calcium carbonate; petiole 0– 30(– 82) mm long; lamina narrowly lanceolate to oblong-elliptical, sometimes that of the lower leaves reduced to phyllodes, 45– 190(– 260) mm long, (3– )7– 28 mm wide, 4– 70 times as long as wide, membranous and translucent, cuneate, acute to mucronate, 5– 11(– 13)-veined, with or without narrow rows of lacunae bordering the midrib, margins often slightly undulate, entire or bearing very minute hyaline teeth; intermediate leaves sometimes present, instead of floating leaves; floating leavesabsent or present, yellow-green to dark green, with a reddish tinge; petiole (14– )30– 70(– 200)mm long, never discoloured at junctionwith the lamina; lamina narrowly oblong to elliptical or ovate, 43– 130 mm long, 12– 30 mm wide, 2– 6 times as long as wide, opaque, subcoriaceous to coriaceous, 11– 21-veined, entire, mostly narrowly cuneate at base, obtuse to acute; stipules axillary, convolute, 20– 62 mm long, translucent, acute, persistent.
Morphology Reproductive morphology Inflorescences
Peduncles mostly terminal or lateral in the axils of submerged leaves, sometimes in the axils of floating leaves, 35– 250 mm long, 2– 3 times as long as the fruiting spike, thicker than the stem; spikes emergent, cylindrical, 30– 90 mm long when in fruit, contiguous.
Morphology Reproductive morphology Flowers
Flowers numerous, sepals pale greeny brown; anthers yellow green; carpels 4; stigmas whitish becoming mauve-brown.
Morphology Reproductive morphology Fruits
Fruitlets pale brown-green, 2.9– 3.9(– 4.1) mm long, 2– 2.5 mm wide, ventrally nearly straight; dorsal keel distinct, lateral keels sometimes present; beak short, obtuse.
Morphology Stem
Stem anatomy:stele of the trio type, rarely of the proto or oblong type, endodermis of the U-type, interlacunar bundles present, in 1 circle (rarely 2, one being incomplete), subepidermal bundles absent or scattered ones present, pseudohypodermis present, 1-layered. Stems annual, sparingly to much branched, slender, terete, up to 3.5 m long, ± spongy; specialized dormant turions not developing.
Figures
Fig. 3 (p. 11).
Habitat
Lakes, ponds, pools, backwaters, also in running waters; the leaves are sometimes incrusted with calcium carbonate; water depth 20– 200 cm; associated with Najas, Ceratophyllum, Nymphaea, Trapa, etc.; 600– 4250 m
Distribution
K3 K4 K5 T1 T2 T3 T4 T5 U1 U2 U3 U4 West Africa from Senegal to Niger,from the Azores to Libya and Egypt and possibly the Middle East

[FSOM]

M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit
Perennial with creeping woody rhizome and 50–250 cm long and 1–3 mm thick terete strongly branched stems carrying thin submerged leaves and sometimes also well developed lanceolate floating coriaceous leaves in addition to the submerged ones
Morphology Leaves
Submerged leaves linear-lanceolate, usually 10–20 x 1–2 cm when mature, distinctly net-veined, strongly attenuate at base and apex, apiculate at the tip, entire and prominently but finely undulate at the margin; petiole 1–6 cm long, merging gradually into the leaf-blade; stipular sheath 2–5 cm long, folded, persistent
Morphology Reproductive morphology Inflorescences
Spikes 2–4 cm long, 15–30-flowered; peduncle up to c. 10 cm long and 2–3 mm thick
Morphology Reproductive morphology Fruits
Fruit 3–4 mm long with 0.5–0.6 mm long beak, smooth; ventral side fairly straight, dorsal rounded with rounded keel and 2 weaker lateral keels.
Distribution
N2, 3; C1; eastern Africa south to the Cape region.
Ecology
Altitude range c. 100–1800 m.
Note
P. schweinfurthii is a very variable species and some collections are probably hybrids. Plants with predominantly coriaceous floating leaves could be hybrids with P. thunbergii Cham. & Schlecht., and at least some plants with submerged leaves only are hybrids with P. lucens L.

Doubtfully present in:

Mauritania

Native to:

Algeria, Azores, Botswana, Burkina, Burundi, Cameroon, Cape Provinces, Central African Repu, Chad, Congo, Corse, Egypt, Eritrea, Ethiopia, Free State, Gabon, Greece, Gulf of Guinea Is., Gulf States, Iran, Italy, Ivory Coast, Kenya, Kriti, KwaZulu-Natal, Lesotho, Libya, Madagascar, Malawi, Mali, Mozambique, Namibia, Niger, Nigeria, Northern Provinces, Portugal, Rwanda, Sardegna, Senegal, Sicilia, Somalia, Spain, Sudan, Swaziland, Tanzania, Tunisia, Turkey, Uganda, Yemen, Zambia, Zaïre, Zimbabwe

Potamogeton schweinfurthii A.Benn. appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Jan 1, 2002 Humblot, M. [352], Madagascar K000099837 Yes
Jan 1, 2002 Schweinfurth, G. [1223], Sudan K000346077 lectotype Yes
Jan 1, 2002 Schweinfurth, G. [1165], Sudan K000346079 syntype Yes
Jan 1, 2002 Schimper [1359], Ethiopia K000346080 syntype Yes
Jan 1, 2002 Cheek, M. [8579], Cameroon K000678189 No
Jan 1, 2002 Buzgo, M. [702], Cameroon K000678179 No
Jan 1, 1998 Wood, J. M. [3015], South Africa K000346084 holotype Yes
Wood, G.H.S. [574], Uganda 18466.000 No
Hepper, F.N. [3997], Chad 27856.001 No
Schweinfurth, G. [1223], Sudan K000346078 Unknown type material Yes
Lye, K.A. [5216], Uganda Potamogeton bunyonyiensis K000099821 holotype Yes

First published in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 8: 220 (1901)

Accepted by

  • Andrews, F.W. (1956). The Flowering Plants of the Sudan 3: 1-579. T.Buncle & co., LTD., Arbroath, Scotland.
  • Barry, J. P. & Celles, J.S. (1991). Flore de Mauritanie 2: 360-550. Centre Regional de Documentation Pedagogique, Nice.
  • Boulos, L. (2005). Flora of Egypt 4: 1-617. Al Hadara Publishing, Cairo.
  • Darbyshire, I., Kordofani, M., Farag, I., Candiga, R. & Pickering, H. (eds.) (2015). The Plants of Sudan and South Sudan: 1-400. Kew publishing, Royal Botanic Gardens, Kew.
  • Dimopoulos, P., Raus, T., Bergmeier, E., Constantinidis, T., Iatrou, G., Kokkini, S., Strid, A., & Tzanoudakis, D. (2013). Vascular plants of Greece. An annotated checklist: 1-372. Botanic gardens and botanical museum Berlin-Dahlem, Berlin and Hellenic botanical society, Athens.
  • Dobignard, D. & Chatelain, C. (2010). Index synonymique de la flore d'Afrique du nord 1: 1-455. Éditions des conservatoire et jardin botaniques, Genève.
  • 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.
  • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa: an annotated checklist. Strelitzia 14.: i-vi, 1-1231. National Botanical Institute, Pretoria.
  • Güner, A. (ed.) (2018). Resimli Türkiye Florası (Illustrated Flora of Turkey) 2: 1-1054. ANG Vakf?/Nezahat Gökyi?it Botanik Bahçesi, Istambul.
  • Hepper, F.N. (ed.) (1968). Flora of West Tropical Africa, ed. 2, 3(1): 1-276.
  • Jongbloed, M., Western, R.A. & Boer, B. (2000). Annotated Check-list for plants in the U.A.E.: 1-90. Zodiac Publishing, Dubai.
  • Kaplan, Z. & Symnoens, J.-J. (2005). Taxonomy, distribution and nomenclature of three confused broad-leaved Potamogeton species occuring in Africa and on surrounding islands. Botanical Journal of the Linnean Society 148: 329-357.
  • Kaplan, Z. (2005). Potamogeton schweinfurthii A. Benn., a new species for Europe. Preslia. Casopsi Ceské Botanické Spolecnosti 77: 419-431.
  • Lebrun, J.-P., Audru, J., Gaston, A. & Mosnier, M. (1972). Catalogue des Plantes Vasculaires du Tchad Méridional: 1-289. Institut d' Elevage et de Médecine Vétérinaire des Pays Tropicaux, Maisons Alfort.
  • Nooteboom, H.P. (ed.) (2002). Flora Malesiana 16: 1-224. Noordhoff-Kolff N.V., Djakarta.
  • Retief, E. & Meyer, N.L. (2017). Plants of the Free State inventory and identification guide. Strelitzia 38: 1-1236. National Botanical Institute, Pretoria.
  • Symoens, J.J. & Villiers, J.-F. (1984). Alismatidées, Flagellariacées. Flore du Cameroun 26: 1-84. Ministère de l'enseignement supérieur et de la recherche scientifique (Mesres), Yaoundé.
  • Symoens, J.J. (2006). Potamogetonaceae. Flora of Tropical East Africa: 1-16.
  • Timberlake, J.R. & Martins, E.S. (eds.) (2009). Flora Zambesiaca 12(2): 1-208. Royal Botanic Gardens, Kew.
  • Wood, J.R.I. (1997). A Handbook of the Yemen Flora: 1-434. The Board of Trustees of the Royal Botanic Gardens, Kew.

Not accepted by

  • Boulos, L. (1995). Flora of Egypt Checklist: i-xii, 1-287. Al Hadara Publishing, Cairo. [Cited as Potamogeton lucens.]

Literature

Flora of West Tropical Africa

  • Berhaut, Fl. Sén. 81
  • Dandy in J. Linn. Soc. 50: 526, fig. 6 (map) (1937)
  • Obermeyer in Fl. S. Afr. 1: 66, fig. 18, 2 (1966).
  • in F.T.A. 8: 220 (1901)

Kew Backbone Distributions

  • Boulos, L. (2005). Flora of Egypt 4: 1-617. Al Hadara Publishing, Cairo.
  • Dobignard, D. & Chatelain, C. (2010). Index synonymique de la flore d'Afrique du nord 1: 1-455. Éditions des conservatoire et jardin botaniques, Genève.
  • 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.
  • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa: an annotated checklist. Strelitzia 14.: i-vi, 1-1231. National Botanical Institute, Pretoria.
  • Güner, A. (ed.) (2018). Resimli Türkiye Florası (Illustrated Flora of Turkey) 2: 1-1054. ANG Vakf?/Nezahat Gökyi?it Botanik Bahçesi, Istambul.
  • Hepper, F.N. (ed.) (1968). Flora of West Tropical Africa, ed. 2, 3(1): 1-276.
  • Jongbloed, M., Western, R.A. & Boer, B. (2000). Annotated Check-list for plants in the U.A.E.: 1-90. Zodiac Publishing, Dubai.
  • Kaplan, Z. & Symnoens, J.-J. (2005). Taxonomy, distribution and nomenclature of three confused broad-leaved Potamogeton species occuring in Africa and on surrounding islands. Botanical Journal of the Linnean Society 148: 329-357.
  • Kaplan, Z. (2005). Potamogeton schweinfurthii A. Benn., a new species for Europe. Preslia. Casopsi Ceské Botanické Spolecnosti 77: 419-431.
  • Lebrun, J.P., Toutain, B., Gaston, A. & Boudet, G. (1991). Catalogue des Plantes Vasculaires du Burkina Faso: 1-341. Institut d' Elevage et de Médecine Vétérinaire des Pays Tropicaux, Maisons Alfort.
  • Retief, E. & Meyer, N.L. (2017). Plants of the Free State inventory and identification guide. Strelitzia 38: 1-1236. National Botanical Institute, Pretoria.
  • Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo, ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.
  • Symoens, J.J. & Villiers, J.-F. (1984). Alismatidées, Flagellariacées. Flore du Cameroun 26: 1-84. Ministère de l'enseignement supérieur et de la recherche scientifique (Mesres), Yaoundé.
  • Wood, J.R.I. (1997). A Handbook of the Yemen Flora: 1-434. The Board of Trustees of the Royal Botanic Gardens, Kew.

Flora of Somalia

  • Flora Somalia, Vol 4, (1995) Author: by K. A. Lye [updated by M. Thulin 2008]

Flora of Tropical East Africa

  • A.Benn. in Flora of Tropical Africa 8: 220 (1901), pro parte quoad Schimper 1359, nom. conserv .,
  • A.Benn. in Journal of the Linnean Society of London, Botany 38: 23, 28 (1907).
  • Agnew, A.D.Q. & Agnew, S., Upland Kenya Wild Flowers, ed. 2: 302, t. 135 (1994).
  • Cook, Aquat. Wetl. Pl. S. Afr.: 237, fig. 255 (2004).
  • Cribb & Leedal, Mountain Fl. S. Tanzania: 20 (1982).
  • Dandy in Journal of the Linnean Society of London, Botany 50: 526, t. 21, 22 and map fig. 6 (1937).
  • E. Lind & A. Tallantire, Some Common Flowering Plants of Uganda, ed. 1: 194 (1962)
  • E. Lind & A. Tallantire, Some Common Flowering Plants of Uganda, ed. 2: 194 (1972).
  • F. W. Andr., The Flowering Plants of the Sudan 3: 234 (1956).
  • Graebner in Pflanzenr. 4 (11): 79, fig. 19 (1907).
  • Hepper in Flora of West Tropical Africa, ed. 2, 3: 16 (1968).
  • Iversen in Symb. Bot. Ups. 29 (3): 233 (1991).
  • Kaplan & Symoens in Journal of the Linnean Society of London, Botany 148: 346, fig. 7, 8, fig. 9 map (2005).
  • Lisowski et al. in Flore d'Afrique Centrale, Potamogetonaceae: 6, t. 1 (1978).
  • Lye in Fl. Eth.& Eritr. 6: 23, fig. 176.2.4– 5 (1997).
  • Lye in Fl. Somal. 4: 14, fig. 8C, D (1995)
  • O. Hedberg, Afroalpine Vascular Plants p. 32 (1957).
  • Obermeyer in Flora of Southern Africa 1: 66, fig. 18 (2) (1966).
  • Wiegleb & Kaplan in Folia Geobot. 33: 273 (1998).

  • Flora of Somalia

    Flora of Somalia
    http://creativecommons.org/licenses/by-nc-sa/3.0

  • Flora of Tropical East Africa

    Flora of Tropical East Africa
    http://creativecommons.org/licenses/by-nc-sa/3.0

  • Flora of West Tropical Africa

    Flora of West Tropical Africa
    http://creativecommons.org/licenses/by-nc-sa/3.0

  • Herbarium Catalogue Specimens

    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0