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Montana Field Guides

Hornemann's Willowherb - Epilobium hornemannii
Other Names:  Epilobium alpinum [in part]

Native Species

Global Rank: G5
State Rank: SNR

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

External Links






 
General Description
Fibrous-rooted perennial. Stems ascending, 10–25 cm, puberulent in lines. Herbage glabrate, glandular above. Leaves opposite, petiolate below; the blades 1–3 cm long, lanceolate to elliptic, usually entire. Inflorescence a leafy-bracted, few-flowered raceme. Flowers pink to purple; hypanthium ca.1.5 mm long, glabrous; sepals 2–4 mm long; petals 3–8 mm long. Capsule pedicelate, linear, 25–50 mm long, glabrous; seeds minutely papillose with a coma (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are subspecies hornemannii.

Range Comments
Circumboreal south to CA, NM and NH (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 8

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

Recency

 

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



Habitat
Wet, mossy, stony soil of meadows, forests, often along streams; montane, subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
  • Additional ReferencesLegend:   View Online Publication
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    • Hawkins, P.H. 1903. The alpine flora of Montana. M.Sc. Thesis, Bozeman, MT: Montana State University. 24 pp.
    • 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.
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Citation for data on this website:
Hornemann's Willowherb — Epilobium hornemannii.  Montana Field Guide.  .  Retrieved on , from