African Plant Database

Lemna aequinoctialis Welw.
Family : Lemnaceae
Protologue : Apont. 578 (1858 [1859])
Information on the genus : Lemna
Status for NA : accepted (present)
Status for SA : accepted (present)
Status for TA : accepted (present)
Synonym(s) Heterotypic
=Lemna angolensis Welw. ex Hegelm. (1865)
=Lemna paucicostata Hegelm. (1868)
=*Lemna perpusilla auct. Egypt
Ecology and distribution
Trop. Afr.
Biology : Free-floating aquatic herb often forming a scum on pans; frond flat, ovate to lanceolate, 1-6,5x0,7-4,5 mm, with 3 veins, pale green, lacking reddish colour, margins entire; upper surface with 2 papillae, one at centre, the other towards apex; root to 3 mm long, with 2-winged sheath, cap sharply pointed; fruit not winged; seed with 8-26 longitudinal ribs, brownish. Rarely flowering.
Ecology : Stagnant fresh waters (often seasonal; see Syst. Geogr. Pl. 75: 242, 256, 2009), ponds, dams, canals, ditches, pools (eutrophic conditions); rice fields; still watercourses; sometimes a few individuals together; 0-1600 m alt. – Often growing together with Spirodela, Wolffia.
  Confused with L. perpusilla Torr. from E & C N. America
  Worldwide in tropical and warmer parts of the world; introduced further N into temperate regions, e.g. N. America, S Europe, N China, Japan, with a rice culture.
South. Afr.
Biol./Eco : perennial-Herb, Hydrophyte, Pleustophyte- Alt: 1 - 1800 m. Distribution: BOT, NAM, FS, GA, KN, LP, MP

Bibliography for Tropical Africa :
  • (2010). Flore du Gabon. 41: 42
  • Cat. Pl. Vasc. Burkina Faso:31 (2012)
  • César J. & C. Chatelain (2019). Flore illustrée du Tchad. Conservatoire et Jardin botaniques de Genève, Coopération Suisse & Univ. N'Djaména

Bibliography for Southern Africa :
  • Énum. Pl. Fleurs Afr. Trop. 3: 81 (1995).

Bibliography for North Africa :
  • Fl. Egypt (Boulos) 4: 114 (2005).
More info on :
see under Jstor_African Plant Initiative
see under The Euro-Mediterranean Plant Base
see under Flore d'Afrique Centrale
see under Germplasm Resources Information Network
see under The International Plant Name Index
see under African Plants - a Photo Guide
see under Missouri Botanical Garden
see under Flora of Zimbabwe
see under Herbarium, North Africa MPU
More information >> ( work in progress )
Record n°15695 modified 2007-04-03
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