Rhododendron kiusianum
Common name: 
Kiusianum Azalea
Kyushu Azalea
ro-do-DEN-dron ki-OH-see-ah-num kee-oo-see-AH-num
Native to (or naturalized in) Oregon: 
  • Evergreen, semi-evergreen to deciduous shrub, low, dense, twiggy, often prostrate, 2 ft (0.6 m) in 10 years, may reach 3 ft (0.9 m) high.  Leaves are dimorphic, spring leaves about 4 cm long, wide elliptic or obovate, both sides with stiff flat hairs, summer leaves are obovate and smaller, 1.3-2 cm long.  Flowers typically are shades of purple, but may be red, pink or rarely white, about 2.5 cm across, flat with a very short flaring tube, 5 stamens, usually single but doubles and hose-in-hose have been reported; 2-5 flowers per cluster.
  •  -10°F, mid to mid-late, 5/5/4 [flower / plant & foliage / performance; scale 1 (poor) - 5 (best)].
  • Native to the Kyushu Island of Japan, 4,000-5,000 ft.   Many cultivars are available.   Some used in bonsai.
  • kiusianum: after Kyushu Island, Japan.
  • Rhododendron Species Foundation and Botanical Garden, Federal Way, Washington
Click image to enlarge
  • plant habit, flowering

    plant habit, flowering

  • flowers and leaves

    flowers and leaves

  • flowers