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.