Reddit user Independent-Design17 proposed an intriguing connection between Elden Ring's Erdtree and the Australian Christmas tree, Nuytsia floribunda. While a surface-level resemblance exists, particularly between the smaller Erdtrees in the game and Nuytsia, deeper thematic parallels have been noted by fans.
In Elden Ring, the Erdtree guides the souls of the deceased, a fact reflected by the game's catacombs located at its base. Interestingly, Nuytsia holds a similar spiritual significance in Australian Aboriginal culture. Its blossoms are seen as representing the souls of the departed, and their vibrant color is linked to the sunset, the perceived destination of spirits.
Further strengthening this comparison is Nuytsia's semi-parasitic nature; it draws nutrients from surrounding plants. This mirrors a prevalent fan theory suggesting the Erdtree is parasitic, having usurped the life force of an ancient Great Tree. However, it's now understood that references to a "Great Tree" in the game's descriptions are likely mistranslations, actually referring to the Erdtree's own extensive root system.
Whether FromSoftware intentionally drew inspiration from Nuytsia floribunda remains a mystery, known only to the developers.