1)  Hydrangea macrophylla   ‘Madame Emile Mouillere’

• A blizzard white beauty all summer, long considered the best white mop head.
• A charming companion to evergreen shrubs.
• A beautiful 70-year old specimen graces the Hydrangea Collection along the Arboretum Drive.

2)  Leucothoe davisiae      (Sierra Laurel)

• Native to the mountains of northern California and southern Oregon.
• One of 4,000 species in the Ericaceae family.
• A 20-year old specimen can be found in the Rhododendron Glen.

3)  Rosa moschata ‘Plena’      (Double Musk Rose)

• Cultivated in European and American gardens for centuries.
• Grown for its strong, clove musk fragrance and abundant alabaster white flowers.
• A 65-year old specimen is flourishing by the entrance to the horticulture headquarters.

4)  Stewartia pseudocamellia var. koreana      (Korean Stewartia)

• Native to Japan and Korea, this tree has garnered the Royal Horticulture Society’s Award of Garden Merit.
• The flowers are white with orange anthers, shaped like those of the related camellia.
• A graceful 64-year old specimen is growing beautifully at the south end of Arboretum Drive.

5)  Philadelphus lewisii      (Lewis’ Mock Orange)