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The soil of this unusual biome is very shallow, as sediment is constantly drained by the vast delta of the River and its tributaries. This does not allow for many trees.
What gives the biome this name is the abundance of the arrowhead arum. The primary ground cover here, these tubers feed on the plentiful rain of this biome.
Thanks to the shallow soil, few trees are found in this humid paradise. However, there are a few beeches here and there, as well as willows along the rivers, and there are many bushes.
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