{"id":12023,"date":"2026-05-29T11:23:46","date_gmt":"2026-05-29T09:23:46","guid":{"rendered":"https:\/\/lecompagnonrouge.fr\/?p=12023"},"modified":"2026-06-04T20:44:45","modified_gmt":"2026-06-04T18:44:45","slug":"oxalis-dillenii-oxalis-de-dillenius","status":"publish","type":"post","link":"https:\/\/lecompagnonrouge.fr\/?p=12023","title":{"rendered":"Oxalis dillenii. Oxalis de Dillenius"},"content":{"rendered":"\n

Oxalis dillenii<\/em> est une oxalis \u00e0 fleurs jaunes pr\u00e9sentant des tiges dress\u00e9es. Et \u00e0 inflorescence en quasi-ombelles.<\/p>\n\n\n\n

Notamment selon le nombre de fleurs pr\u00e9sentes \u00e0 son inflorescence, elle est \u00e0 distinguer d’Oxalis fontana<\/em> (Oxalis \u00e9galement dress\u00e9e) et d’Oxalis corniculata<\/em> (la petite prostr\u00e9e qui peuplent nos trottoirs).<\/p>\n\n\n\n

Elle se distingue d’Oxalis corniculata<\/em> parce que ses stipules<\/a> sont rond, d’aspect feuill\u00e9s, alors que ceux d’Oxalis corniculata<\/em> sont triangulaires (noter que le terme \u00ab\u00a0expansion\u00a0\u00bb est utilis\u00e9 dans Flora gallica. Ces stipules sont tr\u00e8s adn\u00e9s, assez petits. J’utilise ici un objectif macro)<\/p>\n\n\n

\n
\"D\u00e9tail<\/figure>\n<\/div>\n\n\n

<\/p>\n\n\n\n

Oxalis dillenii<\/em> se distingue enfin d’Oxalis fontana<\/em>, d’une mani\u00e8re un peu plus complexe: Cette derni\u00e8re poss\u00e8de une inflorescence en cyme<\/a> (m\u00eame structure d’inflorescence que celle des myosotis). Or, il est pratique d’avoir plus de deux fleurs (ce qui n’est pas toujours le cas) pour pouvoir constater la diff\u00e9rence de structure de l’inflorescence. Cependant, si toutes les bract\u00e9oles<\/a> sont sensiblement au m\u00eame niveau et non r\u00e9parties sur un axe, alors l’inflorescence est une ombelle. D\u00e9tail des bract\u00e9oles:<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

<\/p>\n\n\n\n

Enfin, peut-\u00eatre plus facile \u00e0 voir … la pilosit\u00e9 des axes d’Oxalis fontana<\/em> est un peu h\u00e9riss\u00e9e quand celle d’Oxalis dillenii<\/em> est appliqu\u00e9e, et donnant aux jeunes axes un aspect gris\u00e2tre:<\/p>\n\n\n

\n
\"D\u00e9tail<\/figure>\n<\/div>\n\n\n

Origine, taxonomie:<\/strong><\/h2>\n\n\n\n

Plante d’origine am\u00e9ricaine.<\/p>\n\n\n\n

Oxalidales<\/a>> Oxalidaceae<\/a>> Oxalis<\/a> dillenii<\/p>\n\n\n\n

Ecologie<\/strong><\/h2>\n\n\n\n

STATUTS:<\/p>\n\n\n\n

Plante surveill\u00e9e en tant que potentielle envahissante dans certaines r\u00e9gions: Aquitaine, Franche-Comt\u00e9, Auvergne, massif central rh\u00f4ne alpin.<\/p>\n\n\n\n

AUTO-ECOLOGIE:<\/p>\n\n\n\n

Plantes de cultures sarcl\u00e9es et de friches eutrophiles. <\/p>\n\n\n\n

COMMUNAUTES<\/p>\n\n\n\n

Friches vivaces m\u00e9sox\u00e9rophiles europ\u00e9ennes. Artemisietea vulgaris<\/em> Lohmeyer, Preising & T\u00fcxen in T\u00fcxen 1950 ex von Rochow 1951<\/p>\n\n\n\n

<\/p>\n\n\n\n

Les photos ont \u00e9t\u00e9 prises sur un talus routier vers la sortie de Felletin, o\u00f9 elle est assez isol\u00e9e. Parc naturel de Millevaches (PNRM)<\/p>\n","protected":false},"excerpt":{"rendered":"

Oxalis dillenii est une oxalis \u00e0 fleurs jaunes pr\u00e9sentant des tiges dress\u00e9es. Et \u00e0 inflorescence en quasi-ombelles. Notamment selon le nombre de fleurs pr\u00e9sentes \u00e0 son inflorescence, elle est \u00e0 distinguer d’Oxalis fontana (Oxalis \u00e9galement dress\u00e9e) et d’Oxalis corniculata (la petite prostr\u00e9e qui peuplent nos trottoirs). Elle se distingue d’Oxalis corniculata parce que ses stipules…<\/p>\n","protected":false},"author":1,"featured_media":12027,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[753,1258],"tags":[1257],"class_list":["post-12023","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-oxalidaceae","category-oxalis-dillenii","tag-oxalis-de-dillenius"],"yoast_head":"\nOxalis dillenii. 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