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Alnus glutinosa (Willd. ) XXI 4, alder
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Alnus glutinosa (Willd. ) XXI 4, alder
An illustration of alder tree fruit and foliage from the Natural History Museum Botany Library Plate Collection
Mary Evans Picture Library makes available wonderful images created for people to enjoy over the centuries
Media ID 8583015
© Mary Evans Picture Library 2015 - https://copyrighthub.org/s0/hub1/creation/maryevans/MaryEvansPictureID/10704289
Alder Alnus Alnus Glutinosa Betulaceae Black Alder Catkin Common Alder Cone Eudicot European Alder Eurosid Fabidae Fagales Rosid Wetland Angiospermae Dicot Dicotyledon Magnoliophyta
EDITORS COMMENTS
Alnus glutinosa, commonly known as the common alder or European alder, is a remarkable deciduous tree belonging to the Betulaceae family, specifically the genus Alnus. This exquisite botanical illustration from the Natural History Museum Botany Library Plate Collection showcases the intricate details of the alder's catkins and foliage. The alder tree is an angiosperm, a type of flowering plant that produces seeds enclosed in an ovary. As a eudicot, it possesses two embryonic seed leaves, or cotyledons, which can be seen in the seedling stage. The alder is also an essential member of the Fagales order, a group of woody plants that includes oak, beech, and birch. The tree's catkins, which are the male flowers, are prominent in the illustration. These cones, which appear before the leaves, are pendulous and cylindrical, with each one containing numerous microsporangia. The female flowers, or strobili, are located on the same tree but appear as small, cone-like structures that develop into woody cones containing seeds. The alder tree is a valuable component of wetland ecosystems, particularly in Europe. It is often found growing in damp, nutrient-poor soils and plays a crucial role in the nitrogen cycle by fixing nitrogen through symbiotic relationships with bacteria. The tree's ability to thrive in challenging environments has made it an important species for reforestation efforts. This beautiful illustration not only showcases the intricacies of the alder tree but also serves as a reminder of the importance of preserving and studying these natural wonders. The Natural History Museum Botany Library Plate Collection is an invaluable resource for botanical research and education, providing a glimpse into the diversity and complexity of the plant kingdom.
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