Rhododendron yakushimanum (syn. Rhododendron degronianum ssp. yakushimanum)
Yak Rhododendron rho-do-DEN-dron ya-koo-shee-MAH-num
- Broadleaf evergreen shrub, 1-4 ft (0.3-1.2 m), dense, mounded. Mature leaves 5-10 x 2.5-3 cm, linear-oblanceolate to lanceolate, stiff, leathery, tough, upper surface smooth, glossy dark green, underside has thick woolly brown hair (indumenum), new growth is covered in a white felt. Flowers bell-shaped, 3-4 cm long and 5-6 cm wide, rich rose in the bud changing to light pink then white upon opening, about 10 per cluster.
25o F, early-mid; quality rating: 5/5/4 [flower / plant & foliage / performance; scale 1 (poor) - 5 (best)]. Sun.
- Native to the Yaku-shima Island, Japan, also home to the conifer Cryptomeria japonica, Japanese Cedar.
- Rhododendron yakushimanum is now more commonly classified as a subspecies of Rhododendron degronianum, that is R. degronianum ssp. yakushimanum; other subspecies are R. d. ssp. degronianum and R. d. ssp. heptamerum.
- There are many Yak seedling clones and hybrids, a common one is Ken Janeck, which is a seedling of R. d. ssp. yakushimanum.
- Oregon State Univ. campus: northeast of Magruder (probably a cultivar).