Iva angustifolia

Distinguished from other ragweeds by its narrow-leaves and from other narrow leaved plants like members of the genus Euthamia by the presence of 3 three prominent veins under the leaf and a pungent odor when crushed. Not woody. Opposite, narrow leaves. Leaves opposite below becoming alternate above. Inflorescense: heads in a spiciform, spiciform-racemiform, or paniculate arrangement.

Iva angustifolium is often the dominate forb in disturbed sites in east Texas. It is a weed of waste areas and overgrazed pastures of western Louisiana and east Texas (Gandhi and Thomas 1989).

Characteristic of high-sodium soils and naturally or artificially salt-affected sites such as saline barrens and brine-polluted areas. Also occurs in calcareous soils. Full sun.