Sagittaria trifolia

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Sagittaria trifolia
Sagittaria trifolia
Classificazione APG IV
DominioEukaryota
RegnoPlantae
(clade)Angiosperme
(clade)Mesangiosperme
(clade)Monocotiledoni
OrdineAlismatales
FamigliaAlismataceae
GenereSagittaria
SpecieS. trifolia
Classificazione Cronquist
DominioEukaryota
RegnoPlantae
DivisioneMagnoliophyta
OrdineAlismatales
FamigliaAlismataceae
GenereSagittaria
SpecieS. trifolia
Nomenclatura binomiale
Sagittaria trifolia
L.

Sagittaria trifolia L. è una pianta appartenente alla famiglia delle Alismataceae.

Descrizione

Semi e rizomi germinano in primavera. All'inizio dello sviluppo ha foglie lineari, ma man mano che cresce, S. trifolia sviluppa foglie a forma di punta di freccia. Le foglie possono essere lunghe fino a 60 cm, ma vi sono molte variazioni intraspecifiche nella morfologia fogliare.[1] I fiori sono unisessuali, dioici e hanno tre petali bianchi. I semi ovali sono alati. Oltre ai semi, la pianta si riproduce anche producendo tuberi all'estremità dei fusti sotterranei.

Distribuzione e habitat

S. trifolia è ampiamente distribuita dalle regioni temperate[2] tropicali dell'Asia e dell'Europa orientale e si trova anche in vari luoghi del Giappone. Cresce naturalmente nelle risaie, nelle zone umide e nei bacini artificiali.

Usi

Tuberi di S. trifolia

S. trifolia viene talvolta coltivata per scopi ornamentali, ma viene utilizzata raramente. Come accennato in precedenza, si riproduce sia tramite tuberi che semi, quindi a volte viene trattata come un'erba infestante delle risaie difficile da controllare[3] . Tuttavia, una varietà di questa specie (nota come kwai in Giappone) viene coltivata perché i suoi tuberi diventano grandi e commestibili e vengono utilizzati nei piatti di Capodanno (osechi).

Note

  1. ^ 重弥 山河 e 一幸 伊藤, 雑草モノグラフ 2. オモダカ (Sagittaria trifolia L.), in 雑草研究, vol. 49, n. 3, 2004, pp. 206–219, DOI:10.3719/weed.49.206. URL consultato il 23 agosto 2024.
  2. ^ (JA) Yasurō Kadono, Nihon mizukusa zukan, Shohan, Bunʾichi Sōgō Shuppan, 1994, ISBN 978-4-8299-3034-2.
  3. ^ 重弥 山河, 央往 小林 e 邦和 植木, 日長処理の差異がオモダカ (Sagittaria trifolia L.) の生育および繁殖体の生産に及ぼす影響, in 雑草研究, vol. 26, n. 2, 1981, pp. 118–122, DOI:10.3719/weed.26.118. URL consultato il 23 agosto 2024.

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