folia🌐 #floraGuilleries · Flora del massís de les Guilleries
🌿 Urtica dioica L. subsp. dioica
🏷️ Urticaceae
📍 les Guilleries
David GraylessCoussapoa is a genus of #floweringPlants belonging to the family #Urticaceae. Its native range is Mexico, Central & Southern Tropical America. Species:
Ulf MehligThe neotropical genus Cecropia generally features pioneer tree species (photos: C. palmata Willd.). In regions where most of the natural vegetation has been removed, like in the coastal region south of the Amazon mouth, they are ubiquitous. Most species of the genus are myrmecophytic, with ant colonies in their hollow stem centers and ant-nurturing patches at the petiole bases. I collected flowering material from this tree for #HBRA.
#Urticaceae #Amazonas #ants #deforestation #herbarium #botany
#Urticaceae #Amazonas #ants #deforestation #herbarium #botany
Josep GestiLa família Urticaceae (ortigues i morelles) a la flora de #SCFarners:
Una família de plantes ben conegudes per la presència de pèls urticants a les Urtica (ortigues) i de pòl·len al·lergogen a les Parietaria (morelles).
🔗 https://florascf.cat/la-familia-urticaceae-ortigues-i-morelles/
#flora #floraSCF #Guilleries #Urticaceae
Adrien LuyckxAnother cross section in common nettle (Urtica dioica). #Urticaceae #PlantAnatomy.
It is (was) cultivated as a fiber crop. Bast fibers ([2] on the picture) are located in the secondary phloem. It's easily to spot them with their thick secondary wall (in white). Outside (on the right) is collenchyma [1], whose primary wall of cells are thickened (also white). Inside are located the aligned cells of the wood [3].
More information here : https://www.sciencedirect.com/science/article/abs/pii/S0926669014004920
Sometimes, I harvest plants on my way to work, I take a razor blade and I admire #PlantAnatomy under the microscope.
For today, it is a cross section in a stem of common nettle (Urtica dioica, #Urticaceae). Several vascular bundles are joined by the dark circular cambium (that will generate wood and secondary phloem later). Inside, the pith; a part of it has been degraded. The stem is surrounded by collenchyma, a support tissue.
Of course you can recognize the large stingings hairs.
For today, it is a cross section in a stem of common nettle (Urtica dioica, #Urticaceae). Several vascular bundles are joined by the dark circular cambium (that will generate wood and secondary phloem later). Inside, the pith; a part of it has been degraded. The stem is surrounded by collenchyma, a support tissue.
Of course you can recognize the large stingings hairs.