Victoria (botanica)

Come leggere il tassoboxProgetto:Forme di vita/Come leggere il tassobox
Come leggere il tassobox
Victoria
Victoria amazonica
Classificazione APG IV
DominioEukaryota
RegnoPlantae
(clade)Angiosperme
(clade)Angiosperme basali
OrdineNymphaeales
FamigliaNymphaeaceae
GenereVictoria
Lindl., 1837
Classificazione Cronquist
DominioEukaryota
RegnoPlantae
DivisioneMagnoliophyta
ClasseMagnoliopsida
OrdineNymphaeales
FamigliaNymphaeaceae
GenereVictoria
Specie

Victoria Lindl., 1837 è un genere di piante acquatiche della famiglia delle Nymphaeaceae diffuso in Sud America[1], caratterizzate da considerevoli dimensioni (note in inglese come giant waterlilies).

Il nome del genere è un omaggio alla Regina Vittoria (1819–1901).

Tassonomia

Il genere comprende due specie:[1]

  • Victoria amazonica (Poepp.) Sowerby, è la più grande delle ninfee, con foglie che possono raggiungere i tre metri di diametro e gambi di 7–8 m di lunghezza. In passato era denominata Victoria regia. Questa specie è nativa delle zone di acque poco profonde del bacino del Rio delle Amazzoni. È raffigurata nello stemma della Guyana. I fiori sono bianchi al momento in cui sbocciano e diventano rosa subito dopo. Raggiungono i 40 cm di diametro, e sono impollinati da coleotteri.
  • Victoria cruziana A. D. Orb., diffusa nel bacino dei fiumi Paraná-Paraguay è solo leggermente più piccola, con la superficie inferiore delle foglie di color porpora invece che rosso come nella V. amazonica, e ricoperta di una lanugine che manca in V. amazonica. V. cruziana apre i suoi fiori al crepuscolo. Di questa specie è stata descritta una forma trovata nella regione del Pantanal, V. cruziana var. mattogrossensis, caratterizzata da enormi semi.

Note

  1. ^ a b (EN) Victoria Lindl., su Plants of the World Online, Royal Botanic Gardens, Kew. URL consultato il 16 gennaio 2021.

Altri progetti

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