Pappus.

The present study focuses on a comparative study of achenes in seven species of the family Asteraceae from Semi-arid regions of Barmer, Rajasthan, likely Acanthospermum hispidum DC., Eclipta prostrata (L.) L., Erigeron bonariensis L., Launaea procumbens (Roxb.), Pulicaria angustifolia DC., Sonchus oleraceus L., Xanthium strumarium L. Collecting, measuring, describing, and illustrating dried, mature, healthy achenes. The investigation's findings revealed variations in surface, ribs, pappus, shape, size, and colour. The macro-morphological similarities of achenes revealed interspecies relationships and the justifications for their placement in the same family, while the distinctions between them revealed that they are separate species. In order to improve the taxa's systematic position, these characteristics have been utilized. Here is the first description of the macro-morphological studies on achenes.