African Plant Database

Eichhornia crassipes (Mart.) Solms
Protologue : Monogr. Phan. 4: 527 (1883)
Information on the genus : Eichhornia
Basionym : Pontederia crassipes Mart.
Status for MA : accepted (present)
Status for NA : accepted (naturalised-introduced)
Status for SA : accepted (naturalised-introduced)
Status for TA : accepted (naturalised-introduced)
Synonym(s) Homotypic
 Pontederia crassipes Mart.
 Piaropus crassipes (Mart.) Raf.
Ecology and distribution
Trop. Afr.
Biology : Free floating aquatic herb c. 20-80 cm tall; stems rooting at nodes, rhizomatous, with lateral stolons from which new plants originate; roots numerous, sometimes very long, feathery; leaves rosulate, erect, emerging from water; blade rhomboid or ovate, apex obtuse, cuneate to shallowly cordate, very densely nerved, 5-25 cm long and broad; petiole spongy, very much swollen at or below the middle, 5-30(-60) cm long; inflorescence with a long peduncle, spicate, puberulous, 3-35-flowered, 4-15 cm long; perianth lilac or white, upper lobe with a deep violet blotch containing a yellow spot; stamens 6, 3 short, 3 long, filaments glandular-hairy; capsule c. 1,5 cm long. Plants usually apomictic, seeds rarely produced, and rarely germinating. – Juvenile plants are submerged, adults free floating. – Several morphological growth forms exist (see Williams & al., 2005).
Ecology : Slowly flowing rivers, lakes formed by dams and small ponds; seasonally flooded forest; often dominant over large areas; 0-1700(-1980) m alt.
  An escaped ornamental; indigenous to the Amazon River Basin in S. America, now widespread in all tropical and subtropical regions. In Africa not recorded (2001) from Namibia. General map in Gopal (1987): 42 (Water hyacinth).
South. Afr.
Biol./Eco : perennial-Herb, Hydrophyte, Pleustophyte- Ht 0.2 - 0.5 m. Alt: 1 - 1650 m. Distribution: EC, GA, KN, LP, MP, NW, WC

Bibliography for Tropical Africa :
  • Cat. Pl. Vasc. Burkina Faso:120 (2012)
  • Darbyshire, I. Kordofami, M. & al. (2015). The plants of Sudan and South Sudan, An annoted checklist. Kew Publishing

Bibliography for North Africa :
  • BOULOS, L. (1995). Flora of Egypt. Checklist.
  • Fl. Egypt (Boulos) 3: 89 (2002).
More info on :
see under Jstor_African Plant Initiative
see under The Euro-Mediterranean Plant Base
see under Flore d'Afrique Centrale
see under Catalogue de Madagascar
see under African Plants - a Photo Guide
see under Missouri Botanical Garden
see under Flora of Zimbabwe
see under Herbarium, North Africa MPU
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Record n°23656
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