The plant was purchased from the Government Plant Nursery in Bryant Park, Kodaikanal town, in Tamil Nadu, India about 1 to 2 years ago. Since the Tamil language is very different and the in-charge gardener did not speak English, I asked for a tree fern via sign language pointing to the cyathea next to me which is endemic to the region. I bought this plant as a sapling then, at which stage I could not tell much. After confirming again with pointing to the real cyathea next to us, I bought it and brought it back to Mumbai, Maharashtra, India. It's grown since then and it's spreading in the base of the pot. So I'm sure it's not a cyathea/tree fern. But it's unlike anything here in Mumbai. What specific type of fern is it?
Note:The fronds are max 1 to 1.5 feet long. The cut frond in the photo is something a bird broke off. I don't like cutting it's beautiful green foliage :)