Leaves : Cauline and ramal, alternate, suborbicular, broadly ovate, acuminate, velvety on both sides, simple, stipulate, petiolate, deltoid, serrate, slightly hairy, multicostate, reticulate, divergent type.
Inflorescence : Solitary axillary.
Bright-yellow, opening in the evening, bracteates, pedicellate, complete, actinomorphic, hermaphrodite, pentamerous, hypogynous and cyclic.
Calyx of 5 sepals, gamosepalous, free at the tips, valvate, persistent, green.
Corollayellow, about 3 cm in diameter, made up of 5 petals, polypetalous, slightly connate at the base and adnate to staminal tube, twisted.
Androecium consists of indefinite stamens, monadelphous forming a tube around the style, the tube being united with the petals (epipetalous). In the upper part of the staminal tube are borne monothecous and extrorse anthers.
Gynoecium multicarpellary, syncarpous, carpels with a distinct acute point, hairy, shining, ovary superior, multilocular, with one ovule in each locule, placentation axile, style long and stigmas as many as carpels.
Fruits : Multiridged Capsule (carserule)
Seeds : Reniform, blackish-brown, minutely pitted and stellate-hairy.
Flowering and Fruiting time : Throughout the year.