Which species is known as Yak Rhododendron?

The species known as Yak Rhododendron is Rhododendron yakushimanum. This plant is a deciduous or evergreen shrub that originates from the regions of the Himalayas and nearby areas in Asia. It is prized for its attractive flowers, which often bloom in shades of pink or white, and its lush foliage.

Rhododendron yakushimanum is particularly well-suited to cooler climates and is commonly cultivated in various gardens and landscapes for its ornamental value. Its adaptability, along with the appealing aesthetics of its blooms and foliage, makes it a sought-after choice among horticulturists.

The other options listed are not related to the Yak Rhododendron. Viburnum tinus 'Spring Bouquet' is a type of viburnum known for its flowers and foliage but does not belong to the Rhododendron genus. Rosmarinus officinalis, commonly known as rosemary, is an herb and not a flowering shrub like rhododendrons. Sarcococca confusa, known as sweet box, is a different type of evergreen shrub valued for its fragrant flowers but is unrelated to rhododendrons.