Oxalis

Le genre Oxalis (en français, les oxalis, terme masculin ou féminin, ou oxalides) regroupe plusieurs espèces de plantes herbacées de la famille des Oxalidacées, vivaces, basses, le plus souvent rampantes. On les reconnaît à leurs feuilles trifoliées, chaque foliole ayant la forme d'un cœur dont la pointe est constituée par le pétiolule.

En général, les folioles s'ouvrent le jour et se replient pendant la nuit. Les feuilles et les pédoncules floraux ont un goût acidulé caractéristique (il ne faut pas en consommer avec abus, car la plante est considérée comme légèrement toxique en raison de l'acide oxalique qu'elle contient).

Les fleurs portent cinq pétales en forme de coupe, les couleurs variant selon les espèces. La floraison a lieu pour la majorité des espèces en avril-mai.

Les fruits sont des capsules.

Étymologie

Le nom d'Oxalis vient du grec oxys, « aigu, acide », en référence à la saveur piquante des feuilles comestibles due à l'acide oxalique[1].

Synonymes

  • Acetosella
  • Bolboxalis
  • Hesperoxalis
  • Ionoxalis
  • Lotoxalis
  • Otoxalis
  • Oxys
  • Pseudoxalis
  • Sassia
  • Xanthoxalis

Principales espèces

Liste des espèces

Selon BioLib (5 avril 2022)[2] :

Selon NCBI (5 avril 2022)[3] :

Selon The Plant List (5 avril 2022)[4] :

Selon Tropicos (5 avril 2022)[5] (Attention liste brute contenant possiblement des synonymes) :

Trivia

La dernière chanson de l'album Rest (2017) de Charlotte Gainsbourg s'intitule les Oxalis[6].

Notes et références

Liens externes

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