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Vit.En.

Vit.En

Helianthus tuberosus

Helianthus tuberosus

Famiglia: Compositae

Specie: H. tuberosus 

Forma biologica: geofita rizomatosa (G)

Ciclo di vita: poliennale-perenne

Altezza: 100-250 cm

Apparato radicale: fascicolato a partire dal rizoma

Fusto: ipogeo formato da un rizoma fusiforme; quello epigeo è eretto, ramoso all'apice, tomentoso e ispido

Foglie: picciolate, alterne, ovali-lanceolate con apice acuto e margine dentato

Fiore: capolini di 4-10 cm portati in corimbo; i fiori sono gialli, tubulosi quelli centrali e ligulati al margine

Frutto: achenio

Antesi: luglio-novembre

Habitat: terreni argillosi, umidi, rive dei corsi d'acqua

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