Department of Botany, Banaras Hindu University, Varanasi-221005.
Colchincine (0.35 per cent) treatment was given to the shoot apices of diploid Phlox drummondii plants and a few autotetraploids were isolated. The autotetraploids attained greater length and bigger size of the leaves and flowers than the diploid. The leaves were darker green and the stomata larger. The seeds and the pollen grains though bigger in size were very poor in the autotetraploids.
