{"id":5176,"date":"2023-12-31T17:39:46","date_gmt":"2023-12-31T16:39:46","guid":{"rendered":"https:\/\/lecompagnonrouge.fr\/?p=5176"},"modified":"2026-09-07T08:19:35","modified_gmt":"2026-09-07T06:19:35","slug":"oenothera-ligerica-onagre-de-la-loire","status":"publish","type":"post","link":"https:\/\/lecompagnonrouge.fr\/?p=5176","title":{"rendered":"Oenothera ligerica. Onagre de la Loire"},"content":{"rendered":"\n<p class=\"has-medium-font-size wp-block-paragraph\">Oenothera ligerica ou Oenothera x ligerica: ici un hybride d&rsquo;Oenothera suaveolens et d&rsquo;Oenothera villosa<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Les Onagres peuvent \u00eatre morphologiquement tr\u00e8s proches. Une difficult\u00e9 suppl\u00e9mentaire est que la d\u00e9termination va impliquer la pilosit\u00e9. Je vais essayer ici de donner les indices en \u00e9vitant au maximum les caract\u00e9ristiques de pilosit\u00e9, pas forc\u00e9ment les plus pratiques (loupe x10 \u00e0 x30 n\u00e9cessaire).<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Il manque cependant notamment ici pour la determination, une vue pr\u00e9cise sur la pilosit\u00e9 de l&rsquo;ovaire. Il y a pour ce degr\u00e9 de pr\u00e9cision dans la d\u00e9termination, tr\u00e8s tr\u00e8s certainement des pr\u00e9cisions \u00e0 attendre, \u00e0 d\u00e9velopper. Voir note en bas du post.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Les diff\u00e9rentes esp\u00e8ces d&rsquo;Onagres sont divis\u00e9es en sections et sous sections.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">2 onagres courantes, biennis (si elle n&rsquo;est pas confondue) et <a href=\"https:\/\/lecompagnonrouge.fr\/?p=5210\">glazioviana<\/a>, sont de la sous section Oenothera. Elles pr\u00e9sentent des tubes floraux longs. Oenothera longiflora (laquelle est de la sous section Munzia) pr\u00e9sente aussi un long tube floral (hypanthium) et des p\u00e9tales assez grand, lesquels rougissent au fl\u00e9trissement. Pour la sous section Oenothera, les p\u00e9tales ne rougissent pas ou faiblement au fl\u00e9trissement (vieilles fleurs non rouges\/orang\u00e9es). De plus la graine est presque quadrangulaire. Nous sommes donc dans la sous section Oenothera :<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"850\" height=\"567\" src=\"https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2024\/01\/IMG_0468semen-carpo.jpg\" alt=\"Oenothera: graines. Semen-Carpo\" class=\"wp-image-5282\" srcset=\"https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2024\/01\/IMG_0468semen-carpo.jpg 850w, https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2024\/01\/IMG_0468semen-carpo-300x200.jpg 300w, https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2024\/01\/IMG_0468semen-carpo-768x512.jpg 768w\" sizes=\"auto, (max-width: 850px) 100vw, 850px\" \/><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">L&rsquo;Onagre de la Loire est de la sous section oenothera, du complexe d&rsquo;esp\u00e8ces biennis.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Sur la photo: tiges, rachis* et capsules ponctu\u00e9es de rouges, s\u00e9pales restant vert jaune (la non ponctuation, non striation des s\u00e9pales excluent O. fallax, O Velutina, <a href=\"https:\/\/lecompagnonrouge.fr\/?p=5210\">O. glazioviana<\/a>.). Le rachis de l&rsquo;Onagre de la Loire peut \u00eatre stri\u00e9, lav\u00e9 de rouge (confusion alors possible avec O. rubricola), ponctu\u00e9 ou encore vert. <\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\">* rachis: tige de l&rsquo;\u00e9pi, o\u00f9 s&rsquo;ins\u00e8re fleurs et fruits, ou encore nervure centrale d&rsquo;une feuille complexe o\u00f9 s&rsquo;ins\u00e8re les folioles<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Le bouton vert-jaune se r\u00e9tr\u00e9cit progressivement du bas vers le haut. Les pointes des s\u00e9pales sont accol\u00e9es (excluant alors O. parviflora)<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">La capsule: les poils de la capsule de l&rsquo;Onagre de la Loire peuvent cacher ou non les poils glanduleux.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Les stigmates se trouvent entre les anth\u00e8res. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"635\" height=\"1024\" src=\"https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2023\/12\/IMG_20210702_212339-635x1024.jpg\" alt=\"\" class=\"wp-image-5180\" srcset=\"https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2023\/12\/IMG_20210702_212339-635x1024.jpg 635w, https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2023\/12\/IMG_20210702_212339-186x300.jpg 186w, https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2023\/12\/IMG_20210702_212339-768x1238.jpg 768w, https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2023\/12\/IMG_20210702_212339-300x484.jpg 300w, https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2023\/12\/IMG_20210702_212339.jpg 850w\" sizes=\"auto, (max-width: 635px) 100vw, 635px\" \/><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Les p\u00e9tales sont obcord\u00e9s.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"850\" height=\"686\" src=\"https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2023\/12\/IMG_20210628_071506.jpg\" alt=\"\" class=\"wp-image-5181\" srcset=\"https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2023\/12\/IMG_20210628_071506.jpg 850w, https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2023\/12\/IMG_20210628_071506-300x242.jpg 300w, https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2023\/12\/IMG_20210628_071506-768x620.jpg 768w\" sizes=\"auto, (max-width: 850px) 100vw, 850px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Note importante. La plante pr\u00e9sent\u00e9e est indiqu\u00e9e comme ressemblant \u00e0 Oenothera ligerica (en manque d&rsquo;indices suffisamment fiables). C&rsquo;est \u00e0 partir du document \u00e9manant du CNB de Brest sur les Oenoth\u00e8res de la section \u00e9ponyme que je l&rsquo;ai distingu\u00e9e ainsi. La cl\u00e9 de ce document rentre un peu en contradiction avec l&rsquo;alternative 10 de Flora gallica (soit rachis vert ou lav\u00e9 de rougr\u00e2tre clair, soit rachis nettement rouge, au moins en haut). En suivant l&rsquo;alternative 10 de Flora gallica, j&rsquo;aurai \u00e9cris Oenothera (cf.) pycnocarpa, \u00e9galement des bassins moyens de la Loire et du Rh\u00f4ne. C&rsquo;est \u00e0 dire que l&rsquo;individu en photo ne correspond que mal au crit\u00e8res de couleurs du rachis indiqu\u00e9s dans cette flore.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Tison dans la Flore de la France m\u00e9diterran\u00e9enne continentale, indique que O. pycnocarpa se remarque parce que des feuilles ayant sensiblement la m\u00eame taille que celles de la tige se trouvent dans la grappe de fleurs.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Ce qui n&rsquo;est pas le cas ici. <\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">La classification Dietrich (classification internationale) est sans doute, de mon point de vue en tous cas plus pertinente, mais la classification europ\u00e9enne est utilis\u00e9e et peut alors donner lieu des citations \u00e0 caract\u00e8re g\u00e9ographique sous cette forme grammaticale.<\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\">Classification europ\u00e9enne:<\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\"><a href=\"https:\/\/lecompagnonrouge.fr\/?s=myrtales\">Myrtales<\/a>&gt;<a href=\"https:\/\/lecompagnonrouge.fr\/?s=onagraceae\">Onagraceae<\/a>&gt;Oenothera section Oenothera&gt;O. subsect. Oenothera&gt; O. biennis aggr.&gt;<a href=\"https:\/\/lecompagnonrouge.fr\/?s=oenothera\">Oenothera<\/a> ligerica<\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\">Classification internationale: Myrtales&gt;Onagraceae&gt;Oenothera biennis aggr.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Cela parce que les plantes de la sous section <em>Oenothera<\/em> sont tr\u00e8s particuli\u00e8res. Il s&rsquo;agit th\u00e9oriquement plus d&rsquo;hybrides permanents que de v\u00e9ritables esp\u00e8ces. L&rsquo;hybridation (en Permanent Translocation Heterozygotie) s\u00e9lectionne l&rsquo;h\u00e9t\u00e9rozygotie de mani\u00e8re permanente en supprimant l&rsquo;homozygotie, et donc la recombinaison g\u00e9n\u00e9tique. La cons\u00e9quence est que tous les taxons de cette sous section sont interfertiles, en poss\u00e9dant par blocs des g\u00e9notypes \u00ab\u00a0parents\u00a0\u00bb. Bien qu&rsquo;hybrides. Ils se comportent comme des esp\u00e8ces. Alors que ce n&rsquo;en sont pas vraiment &#8230; Ou plut\u00f4t pas du tout. J&rsquo;indique ci dessus les 2 classifications. Je pr\u00e9f\u00e8re pour ma part la classification Dietrich. <\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Le taxon semble avoir \u00e9t\u00e9 d\u00e9couvert \u00e0 la fin des ann\u00e9es 50, par Robert Desch\u00e2tres \u00e0 Charit\u00e9-Sur-Loire, et \u00e0 Pouilly, enti\u00e8rement confirm\u00e9e rapidement par Renner puis admise dans les ann\u00e9es 1990 pour la flore fran\u00e7aise.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">En principe, Loire ou Rh\u00f4ne.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Esp\u00e8ce d&rsquo;alluvions????? <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Noter: lieu ou la plante a \u00e9t\u00e9 photographi\u00e9e. Peu significatif: hyper-agglom\u00e9ration parisienne. Dans l&rsquo;une de mes jardini\u00e8res. Manifestement offert par un oiseau. L&rsquo;une de mes voisines, l&rsquo;un de mes voisins serait donc de la Loire ou du Rh\u00f4ne &#8230; <\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"850\" height=\"567\" data-id=\"5377\" src=\"https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2024\/01\/IMG_9014.jpg\" alt=\"\" class=\"wp-image-5377\" srcset=\"https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2024\/01\/IMG_9014.jpg 850w, https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2024\/01\/IMG_9014-300x200.jpg 300w, https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2024\/01\/IMG_9014-768x512.jpg 768w\" sizes=\"auto, (max-width: 850px) 100vw, 850px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"850\" height=\"567\" data-id=\"5376\" src=\"https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2024\/01\/IMG_9015.jpg\" alt=\"\" class=\"wp-image-5376\" srcset=\"https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2024\/01\/IMG_9015.jpg 850w, https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2024\/01\/IMG_9015-300x200.jpg 300w, https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2024\/01\/IMG_9015-768x512.jpg 768w\" sizes=\"auto, (max-width: 850px) 100vw, 850px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"850\" height=\"536\" data-id=\"5378\" src=\"https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2024\/01\/IMG_9017.jpg\" alt=\"\" class=\"wp-image-5378\" srcset=\"https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2024\/01\/IMG_9017.jpg 850w, https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2024\/01\/IMG_9017-300x189.jpg 300w, https:\/\/lecompagnonrouge.fr\/wp-content\/uploads\/2024\/01\/IMG_9017-768x484.jpg 768w\" sizes=\"auto, (max-width: 850px) 100vw, 850px\" \/><\/figure>\n<\/figure>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Oenothera ligerica ou Oenothera x ligerica: ici un hybride d&rsquo;Oenothera suaveolens et d&rsquo;Oenothera villosa Les Onagres peuvent \u00eatre morphologiquement tr\u00e8s proches. Une difficult\u00e9 suppl\u00e9mentaire est que la d\u00e9termination va impliquer la pilosit\u00e9. Je vais essayer ici de donner les indices en \u00e9vitant au maximum les caract\u00e9ristiques de pilosit\u00e9, pas forc\u00e9ment les plus pratiques (loupe x10&#8230;<\/p>\n","protected":false},"author":1,"featured_media":5179,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[847,46],"tags":[846],"class_list":["post-5176","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-oenothera-ligerica","category-onagraceae","tag-onagre-de-la-loire"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Oenothera ligerica. 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