Abstract
Seed macro and micro morphological characters of nine species distributed in three genera of the family Nyctaginaceae were studied using stereo and scanning electron microscopy, and these characters have been utilized to trace out inter relationships between species by hierarchical clustering using SPSS computer program. Five different parameters of seeds were used including seed size, shape, colour, surface and position of hilum. Seed are found to be angular, non-angular, orbicular, elliptic, or oblanceolate. The seed morphology not only plays a useful role in the delimitation of taxa at the generic or specific levels but it can also be used to assess the phylogenetic relationship among different taxa.
