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Montana Field Guide

Montana Field Guides

Northern Green Orchid - Platanthera aquilonis
Other Names:  Platanthera hyperborea [misapplied], Habenaria hyperborea [misapplied]

Native Species

Global Rank: G5
State Rank: S4

Agency Status
MNPS Threat Rank:
C-value: 8

External Links

General Description
Stems 15–60 cm. Leaves cauline, 3–15 cm long, lanceolate. Inflorescence dense, 3–20 cm long with 8 to 50+ flowers; bracts 1–4 cm long. Flowers yellowish green; lateral sepals 3–6 mm long; hood 2–5 mm long; lip petal 3–5 mm long, narrowly lanceolate, spreading forward; spur cylindric, curved, 3–6 mm long. Capsule 10–15 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Lesica (2012) treats this species as Platanthera hyperborea (L.) Lindl., but also points out the taxonomic difficulties associated with Montana material.

Species Range
Montana Range


Range Comments
AK to Greenland south to CA, NM, NE, IN and NY (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 156

(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)

Often calcareous fens, wet meadows, seeps; montane (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?
    • Fultz, J.E. 2005. Effects of shelterwood management on flower-visiting insects and their floral resources. M.Sc. Thesis. Bozeman, MT: Montana State University. 163 p.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Simanonok, M. 2018. Plant-pollinator network assembly after wildfire. Ph.D. Dissertation. Bozeman, MT: Montana State University. 123 p.
    • Tuinstra, K. E. 1967. Vegetation of the floodplains and first terraces of Rock Creek near Red Lodge, Montana. Ph.D dissertation. Montana State University, Bozeman 110 pp.
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Citation for data on this website:
Northern Green Orchid — Platanthera aquilonis.  Montana Field Guide.  .  Retrieved on , from