Pentanema hirtum is a species of perennial herbaceous plant belonging to the family Asteraceae.

[1] The specific Latin name hirtum refers to the type of hairiness (bristly and rough) of the plant.

The stem is ascending, simple (unbranched) and cylindrical, the surface is striped and hairy.

The underground portion consists of a moderate sized oblique rhizome of a light color.

All the leaves along the stem (cauline) are alternately arranged, irregularly toothed, erect, tomentose on both sides and hairy on the edge.