Cinnamon Rhododendron
Rhododendron arboreum subsp. cinnamomeum
Ericaceae · broadleaf evergreen tree · introduced
Last updated
An evergreen tree native to the Himalayas (Nepal, Bhutan, India, and southern Tibet), reaching 10 to 25 feet. Flowers are typically white with purple spots but can be pink or crimson, about 2 inches across. Named for the cinnamon-colored indumentum on the leaf undersides.
A large-growing species best suited to sheltered woodland settings with ample space. Acidic, well-drained soil. Twenty-one diseases and 15 pests documented at the genus level. All parts contain grayanotoxins and are toxic if ingested.
Quick Facts
Root Colonization (Spring–Fall)
Infection at Bud Break
Apothecia Formation & Spore Release
Aecial Stage (Alternate Host)
+ 13 more — see full disease and pest lists below