Echinodorus grandiflorus

Echinodorus grandiflorus
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Monocots
Order:	Alismatales
Family:	Alismataceae
Genus:	Echinodorus
Species:	E. grandiflorus
Binomial name
Echinodorus grandiflorus (Cham. & Schltdl.) Micheli in A.L.P.de Candolle & A.C.P.de Candolle
Synonyms[1]
Alisma grandiflorum Cham. & Schltdl. Echinodorus grandiflorus var. ovatus Micheli in A.L.P.de Candolle & A.C.P.de Candolle Echinodorus grandiflorus var. bracteatus Rataj Echinodorus argentinensis Rataj Echinodorus pellucidus Rataj Echinodorus floridanus R.R.Haynes & Burkhalter

Echinodorus grandiflorus is a plant species in the Alismataceae. It is native to Brazil, Paraguay, Uruguay, Argentina, Venezuela and Florida^[1][2]

Description

Emerse leaves erect, long-petioled, 80–120 cm long. Blade ovate, at the tip shortly acuminate, at the base abrupt, or regularly oval, at the tip blunt or incised, 15 – 26 cm x 7 – 15 cm wide with 7 - 13 veins and distinct pellucid lines. Submersed leaves on short petioles, blades oval or ovate, on both ends acuminate or blunt. Stem erect, 90 – 150 cm long, sparse and inconspicuously warted, inflorescence paniculate, broadly branched in the lower whorl, having 5 - 12 whorls containing 6 - 12 flowers each. Bracts shorter or longer than the pedicels. Pedicels 1 - 2.5 cm long, sepals broadly ovate, ribbed, 4 – 6 mm long, petals white, corolla 3 – 4 cm in diameter. Stamens usually 24. Aggregate fruit globular, shortly echinate, achenes compressed, 3 mm long x 1 mm wide, having 3 - 5 ribs and 3 glands placed usually in one row, beak 0.4 - 0.5 mm long. Veins are often dark reddish-brown and the blade may have reddish-brown irregular spots.^{[3][4][5][6][7]}

Cultivation

Needs a deep rich substrate and good light. Will withstand sub-tropical - tropical temperatures. A strong grower, too big for the average aquarium, the leaves soon growing out of the water. In the wild it grows in sticky mud along rivers. Rataj reports hybrids with E. grandiflorus and E. longiscapus which have mixed features. Supplement with iron and CO₂ if possible. Seems to prefer soft to hard water.

Seems to bloom best in cooler water and in short-day conditions.

Apparently rarely found in the trade, the majority (if not all) specimens being offered being E. palaefolius.

References

1. Kew World Checklist of Selected Plant Families
2. Biota of North America Program
3. Davidse, G., M. Sousa Sánchez & A.O. Chater. 1994. Alismataceae a Cyperaceae. 6: i–xvi, 1–543. In G. Davidse, M. Sousa Sánchez & A.O. Chater (eds.) Fl. Mesoamer.. Universidad Nacional Autónoma de México, México, D. F.
4. Haynes, R. R. & L.B. Holm-Nielsen. 1986. Notes on Echinodorus (Alismataceae). Brittonia 38(4): 325–332.
5. Rataj, K. 1978. Alismataceae of Brazil. Acta Amazonica 8(1, supl. 1): 1–53.
6. Stevens, W. D., C. Ulloa Ulloa, A. Pool & O. M. Montiel. 2001. Flora de Nicaragua. Monographs in systematic botany from the Missouri Botanical Garden 85: i–xlii,.
7. Micheli, Marc, in Candolle, Alphonse Louis Pierre Pyramus de & Candolle, Anne Casimir Pyramus de. 1881. Monographiae Phanerogamarum 3: 57

External links

• Echinodorus argentinensis - German text but useful photographs
• line drawing of Echinodorus grandiflorus