{"id":2860,"date":"2025-08-25T12:41:26","date_gmt":"2025-08-25T12:41:26","guid":{"rendered":"https:\/\/www.lejardin-auxnympheas.com\/?post_type=product&p=2860"},"modified":"2026-09-28T09:05:51","modified_gmt":"2026-09-28T09:05:51","slug":"thermarum-godet-de-9","status":"publish","type":"product","link":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/produit\/thermarum-godet-de-9\/","title":{"rendered":"Nymphaea Thermarum"},"content":{"rendered":"

<\/a><\/a><\/a><\/a><\/a><\/a><\/a><\/a><\/a><\/a><\/a> Nymphaea thermarum<\/b><\/i><\/span><\/span><\/span>\u00a0<\/span>est une esp\u00e8ce de\u00a0<\/span><\/span><\/span>plantes<\/span><\/span><\/span><\/a><\/span><\/span>\u00a0<\/span>\u00e0 fleurs de la famille des\u00a0<\/span><\/span><\/span>Nymphaeaceae<\/i><\/span><\/span><\/span><\/a>. C’est une\u00a0<\/span><\/span><\/span>plante aquatique<\/span><\/span><\/span><\/a>\u00a0<\/span>originaire du\u00a0<\/span><\/span><\/span>Rwanda<\/span><\/span><\/span><\/a>. C’est le plus petit\u00a0<\/span><\/span><\/span>n\u00e9nuphar<\/span><\/span><\/span><\/a>\u00a0<\/span>au monde. Ses feuilles mesurent seulement\u00a01\u00a0<\/span><\/span><\/span>cm<\/span>\u00a0<\/span>de diam\u00e8tre, moins de 10<\/span><\/span><\/span>\u00a0<\/span>% du diam\u00e8tre de la plus petite esp\u00e8ce suivante du genre Nymphaea. Par comparaison, le plus grand n\u00e9nuphar a des feuilles qui peuvent atteindre\u00a03\u00a0<\/span><\/span><\/span>m<\/span>. Toutes les plantes sauvages ont \u00e9t\u00e9 perdues en raison de la destruction de son habitat naturel au\u00a0<\/span><\/span><\/span>Rwanda<\/span><\/span><\/span><\/a>, mais il a \u00e9t\u00e9 sauv\u00e9 de l’extinction quand il a \u00e9t\u00e9 reproduit \u00e0 partir de graines aux\u00a0<\/span><\/span><\/span>jardins botaniques royaux de Kew<\/span><\/span><\/span><\/a>\u00a0<\/span>en 2009<\/span><\/span><\/span><\/p>\n

<\/a> Taxonomie<\/span><\/span><\/p>\n

<\/a><\/a><\/a><\/a><\/a><\/a><\/a><\/a><\/a><\/a> Nymphaea thermarum<\/i><\/span>\u00a0a \u00e9t\u00e9 d\u00e9couvert en 1987 par le\u00a0<\/span>botaniste<\/span><\/a><\/span>\u00a0allemand\u00a0<\/span>Eberhard Fischer<\/span><\/a><\/span>. L’<\/span>\u00e9pith\u00e8te sp\u00e9cifique<\/span><\/a>,\u00a0<\/span>thermarum<\/i><\/span>, se r\u00e9f\u00e8re \u00e0 la source d’eau chaude qui a fourni son habitat d’origine. Il n a pas de nom vernaculaire mais aux jardins de Kew, il est officieusement qualifi\u00e9 de\u00a0<\/span>pygmy Rwandan water lily<\/i><\/span>\u00a0(n\u00e9nuphar pygm\u00e9e rwandais)<\/span><\/p>\n

<\/a> Description<\/span><\/span><\/p>\n

<\/a><\/a><\/a><\/a> N. thermarum<\/i><\/span>\u00a0forme des rosettes 20 \u00e0\u00a030\u00a0cm\u00a0de diam\u00e8tre, avec des feuilles d’un vert lumineux avec des p\u00e9tioles courts. Les tr\u00e8s petites fleurs sont blanches avec des \u00e9tamines jaunes\u00a0; les fleurs se tiennent debout \u00e0 quelques centim\u00e8tres au-dessus de l’eau. Elles peuvent s’auto-polliniser, et apr\u00e8s la floraison, la tige de la fleur se coude afin que les graines entrent en contact avec la boue. Les s\u00e9pales sont l\u00e9g\u00e8rement velus et aussi grands que les p\u00e9tales de la fleur. C’est une plante \u00e0 fleurs diurnes matinales, les fleurs s’ouvrant t\u00f4t le matin et se fermant en d\u00e9but d’apr\u00e8s midi.<\/span><\/span><\/span><\/p>\n

<\/a><\/a><\/a><\/a> Il est class\u00e9 dans le sous-genre\u00a0<\/span>Brachyceras<\/i><\/span>, m\u00eame si les feuilles sont plus typiques du sous-genre\u00a0<\/span>Nymphaea<\/i><\/span>. Il ne semble pas former de tubercules. Les graines sont grandes pour des plantes du sous-genre\u00a0<\/span>Brachyceras<\/i><\/span>.<\/span><\/span><\/span><\/p>\n

<\/a> Histoire et mise en culture<\/span><\/span><\/p>\n

<\/a><\/a><\/a><\/a> Dans son habitat naturel la plante cro\u00eet dans de la boue humide autour d’une source d’eau douce chaude \u00e0 Mashyuza au\u00a0<\/span>Rwanda<\/span><\/a><\/span>. Elle a disparu vers 2008 quand les cultivateurs indig\u00e8nes ont commenc\u00e9 \u00e0 utiliser la source pour leurs cultures. Ils ont coup\u00e9 l’arriv\u00e9e de l’eau ce qui a ass\u00e9ch\u00e9 les quelques m\u00e8tres carr\u00e9s o\u00f9 poussait le petit n\u00e9nuphar. Avant la disparition de la plante, Fischer, conscient de la fragilit\u00e9 de son habitat, en avait envoy\u00e9 quelques exemplaires au\u00a0<\/span>jardin botanique de Bonn<\/span><\/a><\/span>\u00a0. Les plantes ont \u00e9t\u00e9 cultiv\u00e9es mais tous les essais de germination ont \u00e9t\u00e9 vains. Les vingt derni\u00e8res graines disponibles ont alors \u00e9t\u00e9 envoy\u00e9es au\u00a0<\/span>jardin botanique de Kew<\/span><\/a> o\u00f9 un sp\u00e9cialiste en horticulture tropicale, Carlos Magadalena, a trouv\u00e9 le moyen de les faire germer en pla\u00e7ant les graines dans des pots remplis de terreau et entour\u00e9s d’eau \u00e0 temp\u00e9rature ambiante de 25 \u00b0C. Dans ces conditions huit plantules se sont d\u00e9velopp\u00e9es et ont commenc\u00e9 \u00e0 fleurir en novembre 2009 pour la premi\u00e8re fois en culture<\/span><\/p>\n

<\/a><\/a><\/a><\/a><\/a><\/a><\/a>Les graines de <\/span>Nymphaea<\/i><\/span><\/a><\/span>\u00a0germent typiquement \u00e0 une certaine profondeur dans l’eau, mais la germination des graines de\u00a0<\/span>Nymphaea thermarum<\/i><\/span> requiert un certain taux de CO2. Quand Magadalena comprit cette diff\u00e9rence, il parvint \u00e0 les faire germer. Entre-temps, un rat avait mang\u00e9 une des deux plantes encore en vie en Allemagne. Une fois le probl\u00e8me de la germination r\u00e9solu, Magdalena constata que la petite plante \u00e9tait facile \u00e0 cultiver et montrait un potentiel en tant que plante d’int\u00e9rieur. L’esp\u00e8ce fut alors consid\u00e9r\u00e9e comme sauv\u00e9e<\/span><\/span><\/a><\/a><\/p>\n

<\/a><\/a> Une population sauvage de\u00a0Nymphaea thermarum<\/i>\u00a0a \u00e9t\u00e9 d\u00e9couverte en 2023<\/span><\/span><\/p>\n

 <\/p>\n

conseil de culture:<\/p>\n

personnellement je le cultive en pot flottant dans de l’argile pour qu’il soit toujours \u00e0 la profondeur id\u00e9ale<\/p>\n

les graines se ress\u00e8ment alors tr\u00e8s facilement et peuvent m\u00eame former un tapis de de plantules tr\u00e8s dense autour des pieds m\u00e8res<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Nymphaea thermarum\u00a0est une esp\u00e8ce de\u00a0plantes\u00a0\u00e0 fleurs de la famille des\u00a0Nymphaeaceae. C’est une\u00a0plante aquatique\u00a0originaire du\u00a0Rwanda. C’est le plus petit\u00a0n\u00e9nuphar\u00a0au monde. Ses […]<\/p>\n","protected":false},"featured_media":6247,"comment_status":"open","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[17,21],"product_tag":[],"class_list":["post-2860","product","type-product","status-publish","has-post-thumbnail","product_cat-nenuphars","product_cat-tropicaux","desktop-align-left","tablet-align-left","mobile-align-left","first","outofstock","shipping-taxable","purchasable","product-type-simple"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/product\/2860","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/comments?post=2860"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/media\/6247"}],"wp:attachment":[{"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/media?parent=2860"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/product_brand?post=2860"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/product_cat?post=2860"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/product_tag?post=2860"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}