Native to (or naturalized in) Oregon:
- Deciduous tree, to 60-80 ft (18-24 m) tall with a 40 ft (12 m) spread. Leaves about 23 x 11 cm, elliptic-ovate to oblong-lanceolate, tip pointed (acute to accuminate), base unequal, rounded to wedge-shaped, upper surface dark green, pale green below. Flowers large, 15-25 cm wide, goblet shaped at first, later wide spreading, like water lilies, tepals (petals) usually white or pinkish on the inside and deep rose-pink on the outside, inner whorls erect enclosing inner flower parts; blooms in late winter or spring before leaves appear. Fruit cluster (cones), cylindrical, to 51 cm long, erect, then pendent.
- Sun or partial shade. Protect from wind to prevent the large, showy flowers from being torn or shredded. Reportedly seedlings bloom only after 20 or more years, grafted plants within 4-5 years. According to Jacobson (1996), "this species calls forth praise approaching veneration." Several cultivars are in commerce.
- Hardy to USDA Zone 7 Native to the Himalayas of northern India, Nepal, Bhutan, and also southwestern China.
- campbellii: after Dr. Archibald Campbell (1805-1874), Superintendent of Darjeeling (India) and Political Agent to Sikkim, accompanied Joseph Hooker on his Sikkim journey in 1849.