No indeed. Nephrolepis biserrata does NOT occur in the western Indo Himalaya. You need to refer to Fraser Jenkins, Gandhi, Kholia et al., An Annotated Checklist of Indian pteridophytes (vol. 3 for Nephrolepis), to access accurate and first hand information.
The plant you show is a garden grown cultivar of the purely American species, N. exaltata. As an exotic plant it is not part of the natural flora of India, and if cultivated should not be included in a work along with native species, as it is irrelevant to the Indian Flora. But you merely said "from Simla" which makes it sound like a native, in error.
It is N. exaltata cv. 'Bostoniensis', very well known in cultivation worldwide.
Best wishes,
Chris Fraser Jenkins.