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Asplenium ceterach
Rustyback fern is characterized by a short rhizome which gives rise to several green fronds that have a pinnated lamina with trichomes on the lower surface, but not the upper one.
It likes growing in rocky walls, especially in alkaline ones. Unlike many others, this fern likes growing in full sun, and requires little, if any, humidity.
It has been widely used for making infusions as a diuretic.
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