Asplenium ceterach (syn. Ceterach officinarum) is a fern species commonly known as Rustyback. It is characterised by a short rhizome which gives rise to several green fronds that have a pinnated lamina with trichomes on the abaxial (lower) surface, but not the adaxial (upper) one. These trichomes (hairs) are orange-brown in colour, hence the name 'rustyback'. The petiole is shorter than the corpus of the leaf.
This species is found in Western and Central Europe, including the Mediterranean region. ...
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