https://leschroniquesduvegetal.wordpress.com/ <p>Notes et réflexions d'Alain Bonjean</p> fr https://leschroniquesduvegetal.wordpress.com/2026/06/18/comprendre-le-developpement-de-larbre-grace-au-dessin/ 2026-06-18 06:00:00 Préambule : En novembre 2025, dans le 236e article de ce blog, intitulé « Jeanne Millet, architecte des arbres », je vous présentais cette grande scientifique québécoise et vous signalais la sortie de son magnifique livre « The architecture of trees in temperate regions : Its history, concepts, (…) -- <a rel="enclosure" href="https://2.gravatar.com/avatar/be809b3b7799074e05b3864cec7554f9c62956032b846471a87c581504305bf1?s=96&d=https%3A%2F%2F2.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D96&r=G">be809b3b7799074e05b3864cec7554f9c62956032b846471a87c581504305bf1?s=96&d=https%3A%2F%2F2.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D96&r=G</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/1-6.jpg?w=525">1-6.jpg?w=525</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/2-2.png?w=525">2-2.png?w=525</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/3-1.png?w=525">3-1.png?w=525</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/4-1.png?w=525">4-1.png?w=525</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/5-2.jpg">5-2.jpg</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/6-1.jpg?w=329">6-1.jpg?w=329</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/7-2.jpg?w=331">7-2.jpg?w=331</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/8-3.jpg?w=313">8-3.jpg?w=313</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/9-1.jpg?w=315">9-1.jpg?w=315</a>, <a href="https://siaq.org/fr/boutique/" target="_blank" rel="noopener noreferrer">https://siaq.org/fr/boutique/</a> Alain 2026-06-18T04:00:00Z text/html fr-FR Les chroniques du végétal – Notes et réflexions d'Alain Bonjean Alain https://leschroniquesduvegetal.wordpress.com/2026/06/08/le-cafeier-arabica-de-lethiopie-aux-tasses-du-monde/ 2026-06-08 06:00:00 Coffea arabica sauvage en sous-bois, Ethiopie ©LenoxHotel ; plantation d'arabica, Cafetales, Triángulo del Café, Colombia © TriánguloDelCafé-Travel Le caféier arabica (Coffea arabica L., 1753), est à l'origine de la boisson caféinée qui réveille des milliards de personnes chaque matin. Ce petit (…) -- <a rel="enclosure" href="https://2.gravatar.com/avatar/be809b3b7799074e05b3864cec7554f9c62956032b846471a87c581504305bf1?s=96&d=https%3A%2F%2F2.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D96&r=G">be809b3b7799074e05b3864cec7554f9c62956032b846471a87c581504305bf1?s=96&d=https%3A%2F%2F2.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D96&r=G</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/1-5.jpg?w=500">1-5.jpg?w=500</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/2-4.jpg?w=679">2-4.jpg?w=679</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/3-3.jpg?w=528">3-3.jpg?w=528</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/4-3.jpg?w=330">4-3.jpg?w=330</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/5-1.jpg?w=180">5-1.jpg?w=180</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/6.jpg?w=693">6.jpg?w=693</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/7-1.png?w=525">7-1.png?w=525</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/8-2.jpg">8-2.jpg</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/9.png?w=525">9.png?w=525</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/10-1.jpg?w=525">10-1.jpg?w=525</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/11.jpg?w=408">11.jpg?w=408</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/12-2.jpg?w=275">12-2.jpg?w=275</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/13-2.jpg?w=168">13-2.jpg?w=168</a>, <a href="https://doi.org/10.1016/bs.abr.2024.04.003" target="_blank" rel="noopener noreferrer">https://doi.org/10.1016/bs.abr.2024.04.003</a>, <a href="https://www.tikafe.fr/histoire-du-cafe#:~:text=Introduction%20du%20caf%C3%A9%20en%20Martinique,rentra%20en%20permission%20%C3%A0%20Paris" rel="nofollow">https://www.tikafe.fr/histoire-du-cafe#:~:text=Introduction%20du%20caf%C3%A9%20en%20Martinique,rentra%20en%20permission%20%C3%A0%20Paris</a> Alain 2026-06-08T04:00:00Z text/html fr-FR Les chroniques du végétal – Notes et réflexions d'Alain Bonjean Alain https://leschroniquesduvegetal.wordpress.com/2026/06/01/guadua-le-bambou-le-plus-resistant-du-monde/ 2026-06-01 06:00:00 En 1822, le botaniste allemand Karl Sigismund Kunth (1788-1850), étudiant les spécimens de Poacées collectés lors de la célèbre expédition sud-américaine (1799-1804)1 menée par l'explorateur prussien Alexander von Humboldt (1769-1859)2 et le naturaliste français Aimé Bonpland (1773-1859)3, (…) -- <a rel="enclosure" href="https://2.gravatar.com/avatar/be809b3b7799074e05b3864cec7554f9c62956032b846471a87c581504305bf1?s=96&d=https%3A%2F%2F2.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D96&r=G">be809b3b7799074e05b3864cec7554f9c62956032b846471a87c581504305bf1?s=96&d=https%3A%2F%2F2.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D96&r=G</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/1-4.jpg?w=238">1-4.jpg?w=238</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/2-3.jpg?w=619">2-3.jpg?w=619</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/3-2.jpg?w=525">3-2.jpg?w=525</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/4-2.jpg?w=582">4-2.jpg?w=582</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/5-1.png?w=527">5-1.png?w=527</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/6-2.png?w=525">6-2.png?w=525</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/7-1.jpg?w=443">7-1.jpg?w=443</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/8-1.jpg?w=432">8-1.jpg?w=432</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/9.jpg?w=162">9.jpg?w=162</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/10.png?w=540">10.png?w=540</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/11-1.png?w=540">11-1.png?w=540</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/12-1.jpg?w=294">12-1.jpg?w=294</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/13-1.jpg?w=445">13-1.jpg?w=445</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/14-1.jpg">14-1.jpg</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/15-1.png?w=334">15-1.png?w=334</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/16-1.png?w=539">16-1.png?w=539</a>, <a href="https://bildner.org/wp-content/uploads/2017/04/Alexander-von-Humboldt.pdf" rel="nofollow">https://bildner.org/wp-content/uploads/2017/04/Alexander-von-Humboldt.pdf</a>, <a href="https://www.tela-botanica.org/2018/12/aime-goujaud-dit-bonpland-botaniste-explorateur-missionbotanique/" rel="nofollow">https://www.tela-botanica.org/2018/12/aime-goujaud-dit-bonpland-botaniste-explorateur-missionbotanique/</a> Alain 2026-06-01T04:00:00Z text/html fr-FR Les chroniques du végétal – Notes et réflexions d'Alain Bonjean Alain https://leschroniquesduvegetal.wordpress.com/2026/05/21/diffusion-tres-precoce-du-mil-chandelle-dafrique-en-asie/ 2026-05-21 07:00:00 L'an dernier, dans ma 196e chronique1, j'avais évoqué l'ancienneté de la présence des mils et des sorghos africains en Europe. Aujourd'hui, je vous propose de revenir sur la diffusion du mil chandelle d'Afrique vers l'Inde, à la lumière de deux faits récents : d'une part, la découverte de (…) -- <a rel="enclosure" href="https://2.gravatar.com/avatar/be809b3b7799074e05b3864cec7554f9c62956032b846471a87c581504305bf1?s=96&d=https%3A%2F%2F2.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D96&r=G">be809b3b7799074e05b3864cec7554f9c62956032b846471a87c581504305bf1?s=96&d=https%3A%2F%2F2.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D96&r=G</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/1-2.jpg">1-2.jpg</a>, <a rel="enclosure" href="https://leschroniquesduvegetal.wordpress.com/wp-content/uploads/2026/05/2-1.png?w=1013">2-1.png?w=1013</a>, <a>Non classé</a> Alain 2026-05-21T05:00:00Z text/html fr-FR Les chroniques du végétal – Notes et réflexions d'Alain Bonjean Alain