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

Toxicodendron rydbergii var. rydbergii (Small ex Rydb.) Greene
poison ivy (western poison ivy)
Anacardiaceae (Sumac family)

Introduction to Vascular Plants

General:
Deciduous slender shrub, decumbent to erect, ivylike, up to 2 m tall, somewhat hairy, exuding milky juice when cut.

Leaves:
Leaflets 3, abruptly sharp-pointed or long-pointed, broadly egg-shaped, entire or shallowly crenate to lobed, 5-15 cm long.

Flowers:
Inflorescence of crowded axillary panicles; flowers 2-3 mm long.

Fruits:
Berrylike drupes, 4 mm long, white to greenish-yellow, glabrous.

Notes:
The slightly volatile oils of this plant cause an allergic reaction for some people.

Source: The Illustrated Flora of British Columbia

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Illustration Source: The Illustrated Flora of British Columbia

Ecological Framework for Toxicodendron rydbergii

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
Site Information	Avg	Min	Max
Elevation (metres)	470	205	1181
Slope Gradient (%)	24	0	77
Aspect (degrees) [0 - N; 90 - E; 180 - S; 270 - W]	190	20	320
Soil Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric]	3	0	7
Modal Nutrient Regime Class	D
# of field plots species was recorded in:	91
Modal BEC Zone Class	BG
All BEC Zones (# of stations/zone) species was recorded in	BG(50), ICH(1), IDF(21), PP(18)
Source: Klinkenberg 2013

Origin Status	Provincial Status	BC List (Red Blue List)	COSEWIC
Native	S5	Yellow	Not Listed

BC Ministry of Environment: BC Species and Ecosystems Explorer.

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