Spanish cities are full of a tree that litters everything with flowers and fruits. They have a reason to be there
If during these weeks of summer you have walked through the streets of your city, it is very likely that you have stepped on a dense carpet of small creamy white flowers. The person responsible for this summer floral rain is an old acquaintance of the urban trees that we popularly know as “Japanese acacia” and scientifically as Styphnolobium japonicum. Its usefulness. If you wonder why the city councils of cities like Zaragoza, Barcelona or Murcia insist on planting this species on paved avenues, the answer It is in its extraordinary adaptive physiology. Something that is supported by the technical sheets that classify it as a species highly tolerant to urban pollution. It is a tree that successfully withstands traffic pollutionheat islands, drought and poor or highly compacted soils. Added to this is its ability to provide dense shade during the harshest months of the year, making it an ideal candidate for road alignment design. It’s not perfect. The only negative point that this tree may have, despite the long list of advantages, is the annoyance that the massive drop of its flowers and later of its fleshy fruits can cause in pedestrian areas. This is something that can end up being quite annoying and making cities very dirty, which is why it requires good maintenance and cleaning. Late flowering. While most urban trees bloom in spring, the Styphnolobium japonicum Save your energy for the summer. Specifically, flowering occurs in the hottest months, between June and August. Its small papilionaceous flowers not only create that characteristic “carpet” impression on the ground, but are highly melliferous. For weeks, the canopy of these trees becomes a hotbed of bees and other pollinators, fulfilling a vital ecological function in the urban ecosystem during a time when other sources of nectar are scarce. Its fruits, strangled legumes reminiscent of a pearl necklace, remain hanging on the branches for a long time, extending their ornamental value well into winter. The identity crisis. One of the great myths around this tree is in its popular name because it is not an acacia. But around his Japanese origin, his epithet “japonicum“was historically misleading, as its native range is not found in Japan, but in the central and southern regions of China. It was introduced to Europe and East Asia much later, where it became greatly popular due to its biological characteristics. Its toxicity. In the field of ethnobotany and traditional Asian medicine, various parts of this tree are have attributed medicinal propertiesand the reality is that it has been seen to have compounds with anti-inflammatory, antioxidant and antibacterial properties. But the problem is that some parts of the tree, such as the raw fruit, are toxic, so their management should be left to the pharmaceutical industry and moving away from home remedies. Images | Bianka Becsi In Xataka | In the 19th century it was planted in parks for its beauty: today this tree is one of the trees that breaks the most pipes and sidewalks in Spain