Wall rue spleenwort is a type of fern belonging to the Aspleniaceae family. Scientifically known as Asplenium ruta-muraria, it is a small fern found in rocky habitats, particularly on walls and cliffs. This species is native to Europe and can also be found in other parts of the world.
The wall rue spleenwort is characterized by its distinctive fronds, which are small and lance-shaped. These fronds grow in a tufted manner, forming a rosette and can reach a length of up to 25 centimeters. The edges of the fronds are typically lobed and undulated, giving them a unique appearance.
This fern is well-adapted to live in rocky environments, often seen clinging onto crevices and cracks on walls with its shallow roots. It prefers well-drained soil and partial shade, although it can tolerate sun exposure if the soil remains moist. It is commonly found in limestone areas, but can also grow on other types of rocks or even in the mortar of old walls.
The name "rue spleenwort" is derived from the herbaceous plant rue, as the fern was believed to have similar medicinal properties. It was historically used in herbal medicine for treating ailments related to the spleen and blood. However, its usage in modern medicine is limited.
In conclusion, the wall rue spleenwort is a small fern found in rocky habitats, characterized by lance-shaped fronds. It is well-adapted to grow in crevices and cracks on walls, and has historical uses in herbal medicine.
