Native to (or naturalized in) Oregon:
- Large shrub or small tree to 30 ft (10 m) tall, has horizontal branches and smooth, reddish-brown, mottled bark. Shoots are tinted red and are slight hairy when young. Leaves simple, alternate, 5-8 cm long, elliptic to obovate, apex acute, base wedge-shaped, margin serrate, downy pubescence below on vein axils and midrib. Flowers appear in late spring or early summer, they are solitary, cup-shaped, 5-6 cm diameter, cream petals, flushed with red on the outer surfaces near the base, anthers yellow. Fruit is ovoid, 2 cm, woody, beaked.
- Partial shade, protect from late afternoon sun on hot days, best in moist soil
- Hardy to USDA Zone 7 Native to southern Japan; found in the mountainous regions of Honshu, Shikoku, and Kyushu Islands.
- serrata: serrated, the leaves (but not all)
- Oregon State Univ. campus: NW corner Milne Computer Center