African Plant Database

Juncus effusus L.
Protologue : Sp. Pl. 1: 326 1: 326 (1753)  
Information on the genus : Juncus
Status for MA : accepted (present)
Status for NA : accepted (present)
Status for SA : accepted (present)
Status for TA : accepted (present)
Synonym(s) Homotypic
 Juncus conglomeratus var. effusus (L.) Koch (1878)
 Juncus communis var. effusus (L.) E. Mey. (1919)
 Juncus effusus L. subsp. effusus
Synonym(s) Heterotypic
=Juncus canariensis Willd. (1823)
=Juncus effusus var. canariensis (Willd.) Buchenau (1880)
=Juncus effusus var. compactus Lej. & Court (1831)
=Juncus fistulosus Guss. (1826)
=Juncus effusus var. fistulosus (Guss.) Buchenau (1880)
Taxon infra-specific
Juncus effusus subsp. laxus (Robyns & Tournay) Snogerup (2002)
Juncus effusus L. subsp. effusus
Ecology and distribution
Trop. Afr.
Biology : Perennial herb with horizontal much-branched rhizome forming dense tussocks with numerous clustered stems; stems 0,6-1,2 m long, 0,15-0,5 cm Ø, with prominent white soft pith in the middle; leaves reduced to cataphylls 1-20 cm long with a blade usually absent or reduced needle-like deciduous, 2-5 mm long; sheaths often red brown; inflorescence: a lateral corymb, much-branched, diffuse or compact with numerous stalked or subsessile flowers, each subtended by a bract and 2 bracteoles; capsule 1,6-2,5 mm long, ovoid, ± equalling perianth.
Ecology : By streams, swampy ground in evergreen bushland and rain-forest; grassland; 1350-3120 m alt.
  Very variable in shape of inflorescence, size and colour of floral parts; several varieties have been described.
  Probably native in Europe, W and C Asia, Africa, N. America, mountains of S. America; now cosmopolitan as introduced and naturalised in many places.
South. Afr.
Biol./Eco : perennial-Herb, Helophyte- Ht 0.45 - 1 m. Alt: 2 - 2050 m. Distribution: LES, EC, FS, GA, KN, LP, MP, NW, WC
Biol./Eco : Herb; distribution: Africa. Europe,

Bibliography for North Africa :
  • BATTANDIER, J.A & L.C. TRABUT (1884). Flore d'Alger et Catalogue des plantes d'Algérie. [Monocot.1] : 13 
  • BATTANDIER, J.A & L.C. TRABUT (1895). Flore de l'Algérie et catalogue des plantes du Maroc. [Monocot. ou vol.2] 2: 80 
  • Cat. Pl. Maroc 1: 110 (1931). 
  • CUÉNOD, A. (1954). Flore analytique et synoptique de la Tunisie. Office de l'Expérimentation et de la Vulgarisation Agricoles. : 191 
  • Fl. Afrique N. 4: 273 (1957). 
  • Fl. Algérie [Quézel & Santa] 1: 184 (1962).
  • Fl. Eur. 5: 105 (1980).
  • VALDES, B., S. TALAVERA & E. FERNANDEZ-GALIANO (ED (1987). Flora Vascular de Andalucía Occidental, vol. 3 3: 217 
  • HANSEN, A. & P. SUNDING (1993). Flora of Macaronesia. Checklist of vascular plants. 4. revised edition Sommerfeltia 17: 1-295
  • VALDÉS, B., REJDALI, M., ACHHAL EL KADMIRI, JURY, (2002). Catalogue des plantes vasculaires du Nord du Maroc, incluant des clés d'identification. II 2: 738
  • BOULOS, L. & E. LE FLOC'H (2008). Flore de Tunisie: catalogue synonymique commenté : 325
  • BORGES P.A.V., C. ABREU & AL. (2008). A list of the terrestrial fungi, flora and fauna of Madeira and Selvagens archipelagos. Direcção Regional do Ambiente da Madeira and Universidade dos Açores : 206
  • FENNANE, M., M. IBN TATTOU, J. MATHEZ, A. OUYAHYA (2014). Flore Pratique du Maroc [vol.3] Trav. Inst. Sci. Univ. Mohammed V, Sér. Bot. 3: 460

Bibliography other :
  • KIPKOECH S. & AL. (2020). An annotated checklist of the vascular plants of Aberdare Ranges Forest, a part of Eastern Afromontane Biodiversity Hotspot PhytoKeys 149:  
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Record n°41729
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