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

Apocynum cannabinum L.
hemp (common dogbane; hemp)
Apocynaceae (Dogbane family)

Introduction to Vascular Plants

© Réal Sarrazin  Email the photographer   (Photo ID #26852)

E-Flora BC Static Map
Distribution of Apocynum cannabinum
Click here to view our interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

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

Perennial herb from a rhizome; stems erect to spreading, glabrous, 0.3-1.0 m tall, branching; plants with milky juice.
Opposite, stalked to subsessile or sessile, oblong-egg-shaped or lanceolate, yellow-green, 5-11 cm long, except sometimes the basal leaves stalked but not heart-shaped at the base, ascending.
Inflorescence of compound, flat-topped clusters; corollas greenish-white to white, 2-4.5 mm long, the corollas less than twice as long as calyx, lobes erect or slightly spreading.
Long cylindric pods, usually greater than 12-18 cm long, sickle-shaped; seeds with tufts of cottony hairs (coma) 2-3 cm long.
The recognition of A. sibiricum and its segregates does not appear warranted.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Blooming Period:
Fruit/Seed characteristics:
Colour: White
Present from Summer to Fall
Source:  The USDA

Habitat / Range

Dry roadsides, ditches, pond and lake edges, fields, waste areas, shrublands and forest openings in the lowland, steppe and montane zones; frequent in BC south of 55degreeN; N to NT, E to NF and S to FL, TX and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Apocynum cannabinum

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) 279 613 1290
Slope Gradient (%) 0 20 67
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
104 185 265
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 4 7
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: BG(11), ICH(5), IDF(8), MS(1), PP(3)


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 not evaluated, unknown or variable.

Synonyms and Alternate Names

Apocynum cannabinum var. angustifolium (Woot.) N.H. Holmgren
Apocynum cannabinum var. glaberrimum A. DC.
Apocynum cannabinum var. greeneanum (Bég. & Beloserky) Woodson
Apocynum cannabinum var. hypericifolium (Aiton) A. Gray
Apocynum cannabinum var. nemorale (G.S. Mill.) Fernald
Apocynum cannabinum var. pubescens (Mitchell ex R. Br.) Woodson
Apocynum cannabinum var. suksdorfii (Greene) Bég. & Beloserky
Apocynum hypericifolium Aiton
Apocynum pubescens Mitchell ex R. Br.
Apocynum sibiricum Jacq.
Apocynum sibiricum var. cordigerum (Greene) Fernald
Apocynum sibiricum var. farwellii (Greene) Fernald
Apocynum suksdorfii Greene
Apocynum suksdorfii var. angustifolium (Woot.) Woodson

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References