{"id":6138,"date":"2024-04-26T20:37:48","date_gmt":"2024-04-26T18:37:48","guid":{"rendered":"https:\/\/lecompagnonrouge.fr\/?p=6138"},"modified":"2026-02-21T10:10:43","modified_gmt":"2026-02-21T09:10:43","slug":"rubus-caesius-ronce-bleuatre","status":"publish","type":"post","link":"https:\/\/lecompagnonrouge.fr\/?p=6138","title":{"rendered":"Rubus caesius. Ronce bleu\u00e2tre."},"content":{"rendered":"\n


Rubus caesius pr\u00e9sente des fleurs \u00e0 p\u00e9tales blancs<\/strong> (les \u00e9tamines d\u00e9passant les pistils. Et les anth\u00e8res \u00e9tant glabres.)<\/p>\n\n\n\n

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

Rubus caesisus se distingue beaucoup car elle poss\u00e8de des stipules ovales \u00e0 lanc\u00e9ol\u00e9s.<\/strong> Cette ronce pr\u00e9sente des fruits bleu\u00e2tre.<\/strong> Les \u00e9pines sont fines.<\/p>\n\n\n

\n
\"Rubus<\/figure>\n<\/div>\n\n\n

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

Pour les ronces, on regarde d’une part la floricane (la tige florif\u00e8re), et d’autre part la primocane ou turion (la jeune tige de l’ann\u00e9e).<\/p>\n\n\n\n

Floricane<\/strong><\/h3>\n\n\n\n

Les feuilles de Rubus caesius sont tern\u00e9es sur la floricane (la tige florif\u00e8re).
Elles sont vertes dessous, et sans poils \u00e9toil\u00e9s.<\/p>\n\n\n

\n
\"Rubus<\/figure>\n<\/div>\n\n
\n
\"Vue<\/figure>\n<\/div>\n\n\n

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

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

Primocane:<\/strong><\/h3>\n\n\n\n

La primocane de Rubus caesius (elle est jeune ici) pr\u00e9sente des feuilles tern\u00e9es \u00e0 p\u00e9tiole sillonn\u00e9 sur toute la longueur. Elle est le plus souvent pruineuse, et ne pr\u00e9sente pas de poils. Ici, elle est non pruineuse, il faut croire que \u00e7\u00e0 arrive.<\/p>\n\n\n

\n
\"Rubus<\/figure>\n<\/div>\n\n
\n
\"\"<\/figure>\n<\/div>\n\n\n

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

Elle pr\u00e9sente des Aiguillons fins +- droit et quelques glandes stipit\u00e9es rouges.<\/p>\n\n\n

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

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

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

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

Note sur un Hybride.<\/strong> <\/h3>\n\n\n\n

Noter que Rubus caesisus s’hybride facilement.<\/p>\n\n\n\n

Rubus x uncinellus peut ressembler \u00e0 la ronce bleu\u00e2tre avant l’apparition des fruits. Mais il pr\u00e9sente des rachis et des p\u00e9dicelles ne poss\u00e9dant que des poils \u00e9toil\u00e9s ou parfois un poil simple\/centim\u00e8tre d’axe.<\/p>\n\n\n\n

Ici, les p\u00e9dicelles sont distinctement sans poils \u00e9toil\u00e9s (et ici avec des glandes stipit\u00e9es rouges):
<\/p>\n\n\n

\n
\"Rubus<\/figure>\n<\/div>\n\n\n

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

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

Rosales<\/a>>Rosaceae<\/a>>section caesii>Rubus<\/a> caesius<\/p>\n\n\n\n

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

Plante nitrophile, acidofuge, plut\u00f4t basophile. M\u00e9sohygrophile \u00e0 m\u00e9sophile. Amplitude auto-\u00e9cologique vaste.<\/p>\n\n\n\n

Fourr\u00e9s arbustifs et d’arbrisseaux m\u00e9dio-europ\u00e9ens, planitiaires \u00e0 montagnards. Rhamno carthaticae – Prunetea spinosae<\/p>\n\n\n\n

mais \u00e9galement: M\u00e9gaphorbiaies eutrophiles. Convolvuletalia sepium; Ourlets eutrophiles: Galio aparines-Urticetea dioicae<\/a>, ainsi que dans les Ourlets basophile m\u00e9dio europ\u00e9ens: Trifolio medii-Geranietea sanguinei<\/p>\n\n\n

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





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

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

lieux o\u00f9 ont \u00e9t\u00e9 prises les photos: Montreuil et Bagnolet. Parc des Beaumonts, et parc des Jean Moulin – Les Guillands<\/p>\n","protected":false},"excerpt":{"rendered":"

Rubus caesius pr\u00e9sente des fleurs \u00e0 p\u00e9tales blancs (les \u00e9tamines d\u00e9passant les pistils. Et les anth\u00e8res \u00e9tant glabres.) Rubus caesisus se distingue beaucoup car elle poss\u00e8de des stipules ovales \u00e0 lanc\u00e9ol\u00e9s. Cette ronce pr\u00e9sente des fruits bleu\u00e2tre. Les \u00e9pines sont fines. Pour les ronces, on regarde d’une part la floricane (la tige florif\u00e8re), et d’autre…<\/p>\n","protected":false},"author":1,"featured_media":6139,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[959],"tags":[958],"class_list":["post-6138","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-rubus-caesius","tag-ronce-bleuatre"],"yoast_head":"\nRubus caesius. 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