E-Flora BC: Electronic Atlas of the Flora of British Columbia

Cornus nuttallii Audubon ex Torr. & A. Gray
western flowering dogwood (Pacific dogwood)
Cornaceae (Dogwood family)

Introduction to Vascular Plants

© Brian Klinkenberg  Email the photographer   (Photo ID #20100)

E-Flora BC Static Map
Distribution of Cornus nuttallii
Click here to view the full interactive map and legend
Details about map content are available here
New! Click on the map dots to view record details.

Introduction

Pacific dogwood is a small native tree species (to 20 m tall) that is found along the Pacific Coast of North America from California to British Columbia (USDA 2010). In British Columbia, it is found in the southwestern corner of the province, both on the mainland and on Vancouver Island. It occurs on mesic, nitrogen-rich forest soils, and is a relatively common part of the shrub layer in mixed and coniferous forests in the region. During spring flowering, this species is readily visible along forest edges prior to full leaf out. The large showy 'flowers' are distinctive and eye-catching. The 4-7 large white or pink-tinged 'petals', however, are actually bracts. The actual flowers are tiny (1.5-2 cm wide), greenish-white (usually purple-tinged or purple-tipped), and occur in clusters in the center, framed by the large bracts. The oval leaves are opposite, and have characteristic 'Cornus' veins that curve parallel to the leaf edge.

The Pacific dogwood was adopted as British Columbia's official floral emblem in 1956.

Species Information

Click on the image below to view an expanded illustration for this species.



General:
Irregularly branched deciduous tree up to 20 m tall; bark blackish-brown, smooth, becoming finely ridged with age, young branches greyish-purplish.
Leaves:
Opposite, deciduous, oval, stalked, pointed at the tip, 4-10 cm long, deep green above, greyish-brown below, turning red in the fall, characteristic veins curving parallel to the leaf edge.
Flowers:
Inflorescence of numerous, unstalked, hemispheric clusters 1.5-2 cm wide, subtended by 4-7 conspicuous white or pinkish-tinged, large (2-7 cm long) showy bracts, flowering in spring and often again in the fall; petals greenish-white, usually purplish-tinged.
Fruits:
Fleshy drupes, 10 mm long, bright red.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Green
Blooming Period:
Mid Spring
Fruit/Seed characteristics:
Colour: Red
Present from Summer to Fall
Source:  The USDA

Habitat / Range

Mesic forests in the lowland and montane zones; common in SW BC; S to CA, disjunct in ID.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Cornus nuttallii

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Minimum

Average

Maximum

Elevation (metres) 0 194 833
Slope Gradient (%) 0 28 95
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
22 217 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 3 7
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
232
Modal BEC Zone Class
CWH
All BEC Zones (# of stations/zone) species was recorded in: CDF(82), CWH(132), ICH(2), IDF(4), SBS(1)

Ecological Indicator Information

A shade-tolerant/intolerant, submontane to montane, Western North American deciduous broad-leaved tree distributed more in the Pacific than the Cordilleran region. Occurs in maritime to submaritime cool mesothermal climates on moderately dry to fresh, nitrogen-rich soils (Moder or Mull humus forms). A shrub or small tree in disturbed communities and coniferous forests on water-shedding sites, most often on colluvial slopes. Its occurrence decreases with increasing latitude, precipitation, and continentality. Characteristic of young-seral mesothermal forests.

SourceIndicator Plants of Coastal British Columbia (Information applies to coastal locations only)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is cool mesothermal.

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References