Viburnum opulus 'Roseum' (syn. V. o. 'Sterile') Caprifoliacae
European Snowball Viburnum, Guelder Rose vi-BER-num OP-u-lus
- Deciduous shrub, 10-12 ft (3-3.7 m); dense mound, upright, spreading, arching branches. Leaves opposite, 5-10 cm long, as wide or wider, pointed lobes (maple-like), glossy dark green in summer, may turn reddish in fall, a few disk-like glands on grooved petiole. Showy flowers sterile, in sphere-like clusters, 6.5-7.5 cm diam., which cover plant in May, initially white-green, then white, and some pink ("rose", hence Roseum) develops when flowers senesce. Since flowers are sterile, no fruit is formed.
- Sun to part shade, susceptible to aphids.
- Hardy to USDA Zone 4 Cultivated since the 16th century.
- Oregon State Univ. campus: west side of Black Cultural Center on Monroe.