Vascular Plants - Adoxaceae - Viburnum:
Viburnum opulus
Page Authors: Don Knoke, David Giblin
cranberry-tree, snowball 
Blooms: May-July
Habit: shrub
Duration: perennial
Origin: Native
Distribution: Scattered localities throughout Washington; British Columbia south to the Columbia River Gorge, east to Idaho and Montana.
Habitat: Moist woods at low to moderate elevations.
Species Description:

General: Deciduous shrub or small tree 1-4 m. tall.
Leaves: Petioles 1-3 cm. long with linear stipules 2-6 mm. long, glabrous except for one or more stalked glands near the summit; leaves opposite, usually with stiff hairs along the mid-vein beneath, palmately 3-veined and 3-lobed, 4-12 cm. long and wide, the lobes usually coarsely few-toothed and acuminate.
Flowers: Inflorescence a compound umbel, short-pedunculate, 5-15 cm. wide, the marginal flowers enlarged and neutral, their corollas rotate, white, deeply 5-lobed, somewhat irregular, 1.5-2.5 cm. across; perfect flowers much smaller, 3-4 mm. across; stamens 5, exerted; ovary inferior, 3-celled, but only I cell fertile.
Fruits: Fruit a drupe, 1-1.5 cm. long, with a large, flattened stone, red.
Subspecies & Varieties:
Accepted Name:
Viburnum opulus L.
Synonyms:
(none)

Treated in Flora of the PNW as:
Viburnum opulus
Additional Resources:

PNW Herbaria Specimens: View list of all Viburnum opulus specimens in the Consortium of Pacific Northwest Herbaria database.

WTU Herbarium Specimens: View list of Viburnum opulus specimens in the WTU Herbarium database.

Washington Flora Checklist: Viburnum opulus treatment.

E-Flora BC: Viburnum opulus atlas page.

CalPhotos: Viburnum opulus images.

USDA Plants Database: Viburnum opulus.
Additional photographs of Viburnum opulus:
(click on a thumbnail to view larger photo)

Ben Legler, 2004

Ben Legler, 2004

Sandie Durand, 2010

Sandie Durand, 2009

Sandie Durand, 2008

Sandie Durand, 2009

Sandie Durand, 2010

Sandie Durand, 2008

Sandie Durand, 2010

Sandie Durand, 2011

Robert L. Carr, 2011

Robert L. Carr, 2011

Robert L. Carr, 2011

Robert L. Carr, 2011

Robert L. Carr, 2011

Robert L. Carr, 2011

Craig Althen, 2016

Craig Althen, 2016
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Washington Native Plant Society
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