The following Participating Institutions are custodians for this species in the CPC National Collection:
CPC National Office
The conservation of Cirsium aridum is fully sponsored.
Jim Locklear contributed to this Plant Profile.
Thistles are more often thought of as weeds than plants in need of conservation, but the Cedar Rim thistle is one of a handful with very limited distributions. Known only known from the cold desert country of central Wyoming, Cedar Rim thistle grows on barren hills and slopes where its silvery, woolly foliage protects it from intense heat, wind and solar radiation. Many of its associates are themselves rare plants.
Distribution & Occurrence
Barren, chalky hills, gravelly slopes, and fine textured, sandy-shaly draws. Occurs in cushion plant communities within more densely vegetated cold desert shrubland dominated by big sagebrush (Artemisia tridentata). Elevation 6700-7200 ft. (Fertig 1994)
Conservation, Ecology & Research
Off-road vehicle damage.
Exact habitat characterization.
Additional survey work.
Additional seed banking.