This is the very distinctive Selaginella bryopteris. It is frequently sold in country bazaars (and in Shillong main street) as being Sanjeevani. However I published a paper on Sanjeevani saying that the evidence was much more likely that Sanjeevani was actually S. tamariscina, growing very rarely, only in Pithoragarh (Tawaghat) near to the ancient Vedic town there. Otherwise, as we see, S. bryopteris is common in South and Central India, so why did Lord Hanuman have to go all the way up to the Himalaya to collect it, when Laxmana urgently needed help for his severe wounds. He could have brought it in 10 minutes from South India, but he had to go all the way up to Uttarakhand, the only place in India (and a very limited area) where the resurrection species, S. tamariscina grows.
Also from Chinese medicinal study S. tamariscina contains compounds that alleviate haemorrhage, which must be relevant! If only Ramdev ji had just picked up the Indian Fern Journal and read my paper he could have collected real Sanjeevani free of charge and without requiring huge Government grants, from the locality I mentioned. But thats not what hes about, I suspect!
Best wishes,
Chris F.J.