Dear Dinesh Ji, I think the reason for the compactness of the inflorescence observed by you in respect to Arati Ji is because the plant possesses a racemose inflorescence (raceme) same like that we see in a grass. The mature flowers are always at the base giving the inflorescence a lax look where as the meristematic (growing) tip portion contains the young buds which have just developed hence are more compact in arrangement over floral axis.
Regards Tanay -- Tanay Bose +91(033) 25550676 (Resi) 9830439691(Mobile)
