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Montana Field Guide

Montana Field Guides

Spreading Dogbane - Apocynum androsaemifolium

Native Species

Global Rank: G5
State Rank: S5
(see State Rank Reason below)

Agency Status
MNPS Threat Rank:
C-value: 3

External Links

State Rank Reason (see State Rank above)
A very common species throughout most of the state. Common in disturbed as well as pristine habitat.
General Description
Stems ascending to erect, 25–100 cm, usually branched. Herbage glabrous to pubescent. Leaves drooping; blades ovate to lance-ovate, mucronate, 2–10 cm long, lighter beneath. Inflorescence axillary and terminal cymes. Flowers tubular to campanulate; calyx 2–3 mm long; corolla white with pink lines, tube 3–5 mm long, lobes 2–3 mm long. Follicles pendulous or ascending, 5–13 cm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

In Montana we have varieties androsaemifolium and pumilum A.Gray.

Species Range
Montana Range


Range Comments
Throughout most of North America (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 712

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)

Forest openings, meadows, roadsides; plains, valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Guenther, G.E. 1989. Ecological relationships of bitterbrush communities on the Mount Haggin Wildlife Management Area. M.Sc. Thesis. Bozeman, MT: Montana State University. 73 p.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
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Citation for data on this website:
Spreading Dogbane — Apocynum androsaemifolium.  Montana Field Guide.  .  Retrieved on , from