Search Field Guide
Advanced Search
MT Gov Logo
Montana Field Guide

Montana Field Guides

Glandular Willowherb - Epilobium halleanum
Other Names:  Epilobium glandulosum [in part]

Native Species

Global Rank: G5
State Rank: SNR

Agency Status
MNPS Threat Rank:
C-value: 4

External Links

General Description
Perennial with turions on fine horizontal roots. Stems erect, 5–50 cm. Herbage sparsely puberulent, glandular above. Leaves opposite, mostly sessile, narrowly elliptic, entire to serrulate, 2–8 cm long. Inflorescence a few-flowered raceme, nodding in bud. Flowers white to pink; hypanthium 0.5–1 mm long; sepals glabrous to glandular-puberulent, 1–2 mm long; petals 2–4 mm long. Capsule pedicelate, 15–45 mm long, glabrous or glandular-hairy; seeds reticulate or papillose with a deciduous coma (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
BC to SK south to CA, AZ and CO (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 9

(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)

Wet meadows, along streams, wetlands, moist grasslands, rocky slopes; montane, subalpine (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?
    • Jones, W. W. 1901. Preliminary flora of Gallatin County. M.S. Thesis. Bozeman, MT: Montana State College. 78 pp.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Williams, K.L. 2012. Classification of the grasslands, shrublands, woodlands, forests and alpine vegetation associations of the Custer National Forest portion of the Beartooth Mountains in southcentral Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 376 p.
  • Web Search Engines for Articles on "Glandular Willowherb"
Login Logout
Citation for data on this website:
Glandular Willowherb — Epilobium halleanum.  Montana Field Guide.  .  Retrieved on , from