Description
Annual, erect, 3-10 cm tall herbs. Root with tap root system, penetrating deep in the soil. Stem hollow, slender, , internodes prominently elongate, faintly striate. Radical leaves distinctly petiolate, petiole 2-5 cm long with sheathy leaf-base. Cauline leaves petiolate, leaflets deeply ternate, segments usually three, linear, acute, glabrous above, pubescent underneath. Inflorescence lateral or terminal leaf-opposed umbels. Peduncles 1-3 cm long, faintly ribbed. Rays unequal, peripheral longer than the central ones. Involucres 3-5 of 3-4 mm long bracts, 3-ribbed from the base. Involucels 5 of 3-3.5 mm long bractlets with ciliate margins, 3-ribbed from the base. Flowers actinomorphic, bisexual, white tinged pale yellow. Calyx reduced, adnate to ovary. Corolla polypetalous, petals 5, obovate, emarginate, slightly unequal, outer petal radiate, margins irregular, tip long pointed, tip curved or straight, white or light yellow. Stamens 5, free, filament glabrous, ± 2.5 mm long inserted on epigynous disc. Ovary bicarpellary syncarpous, inferior, bilocular, hairy, styles , light purple, persistent, epigynous, disc present, base swollen forming stylopodium persistent, crowing the ovary, stigma capitate. Fruit a schizocarp, narrowly elliptic-oblong, slightly thin above the middle, dorsally constricted at commissures, primary and secondary ridges light purple, hairs T-shaped, tubercles at the base, primary ridges slightly winged, variable, more prominent than the secondary ridges, secondary ridges exhibit less number of hairs than the primary ridges. Mericarps slightly compressed dorsally.