Description: Annual herb, 30-150 cm high, slightly aromatic stems erect, robust, much branching, cylindrical, furrowed, densely leafy. Leaves alternate , with special odor, with broad leaf sheath, lower leaves pinnate, with narrowlyliner lobes; middle and upper leaves 2-3 pinnate, with filiform lobes. Inflorescence dense umbel with numerous rays( to 120 or more) slender in flower, thickened and...