Abstract
SUMMARYWild populations of Pteris cretica L. occurring in the Western and Central Himalayas have been observed with cytomorphological variability. Based on contrasting morphological features the collected samples have been sorted out in thirteen groups. Cytological sampling has been done in nine of them which has confirmed their diploid apogamous nature. However variation in populations in production of type of sporangia has been observed. Although the 8-celled apogamous sporangia were observed in highest frequency (90–95%), the 4-celled ones were seen in two such sorted groups in a frequency of 2% to 4% and the 16-celled ones in four of these in a frequency of 1-5%. The SMCs from 4-celled sporangia have 116 regular bivalents. Those of 8-celled type have 58 pairs but they vary in number of ring and rod bivalents. Chromosomal pairing in SMCs of 16-celled sporangia was also observed to vary. In one sorted samples all univalents were seen, in other two, 22–27 bivalents and 4–14 univalents were observed. One ...
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