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.
Photo: @drakiragavon · iNaturalist · CC BY-NC
Rustyback
Asplenium ceterach
- Observations in the area
- 4
- Last sighting
- 12 October 2025
- Category
- Plants
Species and sighting data come from the iNaturalist platform and may change over time.
Where it has been observed
More photos
Photo: @drakiragavon · iNaturalist · CC BY-NC
Photo: @flaviorocchi · iNaturalist · CC BY-NC
Photo: @benoitteyssendier · iNaturalist · CC BY-NC
Photo: Sebastian J. Dunkl · iNaturalist · CC BY-NC
Photo: @mimivk · iNaturalist · CC BY-NC
Photo: Hugo Gaspar · iNaturalist · CC BY-NC
Photo: Colin Jacobs · iNaturalist · CC BY-NC-SA
Photo: @silk128 · iNaturalist · CC BY
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Nature data: iNaturalist
Sighting data also come from open nature platforms and may change over time.