Vascular Plants - Rosaceae - Oemleria:
Oemleria cerasiformis
Page Author: David Giblin
Indian plum, oso-berry, osoberry 
Blooms: March-April
Habit: shrub
Duration: perennial
Origin: Native
Conservation Status: Abundant; of no concern.

Distribution: Occurring west of the Cascades in Washington and along the Columbia River Gorge: British Columbia south to California.
Habitat: Moist to fairly dry, open woods at low elevations.
Species Description:

General: Deciduous shrub, 1.5-3 m. tall, with purplish-brown bark.
Leaves: Leaves alternate, short-petioled, the blades narrowly oblong-lanceolate to elliptic, 5-12 cm. long and up to 4 cm. wide, glabrous and light green above, slightly paler below.
Flowers: Flowers imperfect, in pendant, axillary, bracteate racemes; flowers greenish-white, blossoming as the leaves develop; calyx 6-7 mm. long, the 5 lobes equaling the tube; petals 5, 5-6 mm. long, white, elliptic-obovate, ascending; stamens 15, in 3 series in the tubular portion of the calyx in the staminate flowers; pistils 5, the styles included in the calyx tube in the pistillate flowers.
Fruits: Drupes 8-10 mm. long, 1-seeded, ovoid, bluish-black
Accepted Name:
Oemleria cerasiformis (Torr. & Gray ex Hook. & Arn.) Landon
Synonyms:
Exochorda davidiana Baill.
Nuttallia cerasiformis Torr. & Gray ex Hook. & Arn.
Nuttallia davidiana Baill.
Oemleria cerasiformis var. lancifolia Greene
Oemleria cerasiformis var. nigra Greene
Osmaronia cerasiformis (Torr. & Gray ex Hook. & Arn.) Greene

Treated in Flora of the PNW as:
Oemleria cerasiformis
Additional Resources:

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

WTU Herbarium Specimens: View list of Oemleria cerasiformis specimens in the WTU Herbarium database.

Washington Flora Checklist: Oemleria cerasiformis treatment.

E-Flora BC: Oemleria cerasiformis atlas page.

CalPhotos: Oemleria cerasiformis images.

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

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2003

Clayton J. Antieau, 1987

Clayton J. Antieau, 1984

Clayton J. Antieau, 2004

Clayton J. Antieau, 2004

Jim Riley

Clayton J. Antieau, 2004

H. Tim Gladwin, 1983

H. Tim Gladwin, 1983

Ben Legler, 2006

Ben Legler, 2006

Ben Legler, 2006

Ben Legler, 2006

Shaun Hubbard, 2005

Tim Hagan, 2003

Chris Wood, 2009

G. D. Carr, 2006

G. D. Carr, 2006

G. D. Carr, 2006

G. D. Carr, 2006

G. D. Carr, 2006

G. D. Carr, 2006

G. D. Carr, 2006

G. D. Carr, 2006

G. D. Carr, 2008

G. D. Carr, 2007

G. D. Carr, 2007

G. D. Carr, 2008

Al Dodson, 2007

Paul Slichter, 2009

Paul Slichter, 2009

Paul Slichter, 2009

Paul Slichter, 2009

Susan McDougall, 2006

Susan McDougall, 2011

Daniel McNair , 2015

Susan McDougall, 2014

Roger T. George, 2016

Roger T. George, 2016

Roger T. George, 2016

Roger T. George, 2016

Roger T. George, 2016
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