Apocynum androsaemifolium L.
spreading dogbane
Apocynaceae (Dogbane family)

Introduction to Vascular Plants


© Ian Cumming     (Photo ID #6016)


E-Flora BC Static Map

Distribution of Apocynum androsaemifolium
Click here to view the full interactive map and legend

Species Information

Perennial herb from a rhizome; stems erect, glabrous or hairy, often reddish, 20-70 cm tall, branching; plants with milky juice.
Stem leaves opposite, spreading and drooping, narrow, oval to elliptic, short-stalked, 3-8 cm long, glabrous above, usually hairy beneath.
Inflorescence of compound, flat-topped clusters; corollas pink or whitish with white veins, sweet scented, 4-10 mm long.
Long cylindric pods, 5-12 cm long, seeds numerous with long tufts of cottony hairs (coma).
Two varieties occur in BC:

1. Corollas bell-shaped, 5-10 mm long; pods drooping..................... var. androsaemifolium

1. Corollas more tubular, 4-7 mm long; pods usually erect........................ var. pumilum A. Gray

SourceThe 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.


Ecological Framework for Apocynum androsaemifolium

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




Elevation (metres)
836 60 1802
Slope Gradient (%)
37 0 103

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

189 0 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 0 7
Modal Nutrient Regime
# of field plots
 species was recorded in:
Modal BEC Zone Class

All BEC Zones (# of stations/zone) species was recorded in

BG(11), BWBS(30), CWH(22), ESSF(13), ICH(322), IDF(389), MS(51), PP(84), SBPS(8), SBS(44)

Habitat and Range

Dry roadsides, fields, meadows and open forests in the lowland to subalpine zones; common throughout BC except the Queen Charlotte Islands and adjacent coast; N to AK, YT and NT, E to NF and S to GA, TX, NM and CA.

SourceThe Illustrated Flora of British Columbia


Synonyms and Alternate Names:
Apocynum ambigens Greene
Apocynum androsaemifolium subsp. pumilum (Gray) Boivin
Apocynum androsaemifolium var. glabrum Macoun
Apocynum androsaemifolium var. griseum (Greene) BTg. & Bel.
Apocynum androsaemifolium var. incanum A. DC.
Apocynum androsaemifolium var. intermedium Woods.
Apocynum androsaemifolium var. pumilum Gray
Apocynum androsaemifolium var. tomentellum (Greene) Boivin
Apocynum androsaemifolium var. woodsonii Boivin
Apocynum pumilum (A. Gray) Greene
Apocynum pumilum var. rhomboideum (Greene) BΘg. & Beloserky
Apocynum scopulorum Greene ex Rydb.