Pteridophytes (ferns and fern allies) are spore-bearing, nonflowering, vascular cryptogamous plants. They comprise two independent phases in the life cycle. The gametophytic phase stays for a short period, whereas, the sporophytic phase is the dominant phase in the life cycle. The ferns are distinctive in the rhizome, frond, and sori, whereas the fern allies have small-scale-like leaves and strobilus. Pteridophytes preferably grow in moist, cool climatic conditions and predominantly in tropical rainforests. Their occurrence in dry deciduous to moist deciduous or miscellaneous tropical forests is also common. As per the recommendation of CBD and the priorities of NABP, the comprehension of regional floras has been the subject of present day’s priorities. In view of the above fact, an attempt has been made to prepare a checklist of ferns and fern allies of Uttar Pradesh. The total fo...