Pentanema squarrosum, known as ploughman's-spikenard,[1] is a species of plant in the family Asteraceae found in Europe, North Africa, and the Near East.

[2][3] It is a tall, hairy plant (to 1.2 m) that grows on calcareous, low-nutrient, well-drained soils.

Before flowering, the basal rosette of leaves resembles those of foxgloves.

It flowers after mid-summer in Europe, from July to September.

When the root is burned, it becomes a useful room scent (it is used this way in Turkey).