Rhododendron cinnabarinum
Common name: 
Cinnabar Rhododendron
ro-do-DEN-dron si-na-ba-REEN-um, ki-na-ba-REEN-um
Native to (or naturalized in) Oregon: 
  • Broadleaf evergreen shrub, 5 ft (1.5 m) tall in 10 years, finally 6-10 ft (1.8-3 m), has a thin and sparse growth habit, branches long and slender, scaly when young.  Leaves alternate, simple, 5-10 cm long and 2-3 cm wide, oval, tapering to each end, glossy metallic grayish-green above, scaly below, with the color varying from green to reddish brown; short petiole, about 8 mm long.  Flowers funnel-shaped, 3-5 cm long, 10 stamens, nearly as long as the corolla (petals), hairy at the base, petal color is variable, often a dull cinnabar red, but also red-orange on the outside and yellowish or greenish inside; flower stalk about 8 mm long.
  • 5°F, early-mid to very late, 4/4/2-3.  [flower / plant & foliage / performance; scale 1 (poor) - 5 (best)]  Native to Nepal, India (western Bengal, Sikkim), Bhutan, and southern Tibet.
  • cinnabarinum: cinnabar red
  • Federal Way, Washington: Rhododendron Species and Botanical Garden.
Click image to enlarge
  • plant habit, flowering

    plant habit, flowering

  • flower cluster

    flower cluster

  • flower