Hackelia brevicula is a species of flowering plant in the borage family known by the common name Poison Canyon stickseed.

[1] It grows at 2,700–3,150 metres (8,860–10,330 ft) in elevation, on dry rocky slopes, scrubby areas, and open quaking aspen stand habitats.

[3] Hackelia brevicula is a perennial herb 20 to 60 centimeters tall and coated thinly in stiff hairs.

[2] The inflorescence is an open array of branches, each a coiling panicle of flowers.

Each flower is just over a centimeter wide with light blue lobes with white appendages at the bases.