|Natural range of Cercocarpus ledifolius|
Cercocarpus ledifolius is a North American species of mountain mahogany known by the common name curl-leaf mountain mahogany. It widespread across much of the Western United States as well as Baja California in Mexico.
Cercocarpus ledifolius is a large, densely branching shrub or a tree which may reach 10 meters (33 feet) in height. Its leathery, sticky, dark green leaves are up to 4 centimeters (1.6 inches) long and lance-shaped, and the edges may curl under. The flower consists of a small tan tube from which protrudes a long, plumelike style covered in luxuriant tan hairs. The flowers are arranged in inflorescences of up to 3. The fruit is a hairy achene one half to just over one centimeter (0.2-0.4 inches) long. This plant grows on low mountains and slopes. 
Cercocarpus ledifolius is known to attain ages at least as great as 1,350 years, although the tree that yielded this age was cut down This makes it one of the oldest known flowering plants.
Greater ages have been attributed to various olive trees (Olea europaea) and a sacred fig (Ficus religiosa) in Sri Lanka was reportedly planted in 283 BC, but that date has been contested. The 1,350 year date cited here is also potentially inaccurate due to dating uncertainties detailed by the authors. Much older plants are known to exist, but as clones, not as individuals.
- The Plant List, Cercocarpus ledifolius Nutt. ex Torr. & A.Gray
- Biota of North America Program 2014 county distribution map
- Flora of North America, Cercocarpus ledifolius Nuttall in J. Torrey and A. Gray, 1840. Curl-leaf mountain mahogany
- Calflora taxon report, University of California, Cercocarpus ledifolius Nutt. Desert mountainmahogany, curl leaf mountain mahogany
- Schultz, W.; Tueller, P.T.; Tausch, R.J. (1990). "Ecology of curlleaf mahogany in western and central Nevada: community and population structure" (PDF). Journal of Range Management. 43 (1): 13–20. doi:10.2307/3899112.
- Media related to Cercocarpus ledifolius at Wikimedia Commons
- Jepson Manual Treatment of Cercocarpus ledifolius
- United States Department of Agriculture Plants Profile for Cercocarpus ledifolius
- ledifolius.pdf United States Department of Agriculture IITF description; Cercocarpus ledifolius
- Ethnobotany, University of Michigan
- Cercocarpus ledifolius in the CalPhotos Photo Database, University of California, Berkeley
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