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Montana Field Guide

Montana Field Guides

Roundleaf Orchid - Platanthera orbiculata
Other Names:  Habenaria orbiculata

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Native Species

Global Rank: G5
State Rank: S3S4
C-value: 9


Agency Status
USFWS:
USFS:
BLM:


 

External Links

 
General Description
Stems scapose, 25–60 cm. Leaves basal, 2, opposite, appressed to the ground, broadly elliptic, 7–15 cm long, glossy. Inflorescence open, 5–20 cm long with 5 to 30 flowers; bracts 5–15 mm long. Flowers white; lateral sepals 6–10 mm long; hood 4–6 mm long; lip petal 7–13 mm long, linear-lanceolate, pendent; spur slender, curved, 10–20 mm long. Capsule 10–12 mm long, cylindric (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are variety orbiculata.

Species Range
Montana Range Range Descriptions

Native
 


Range Comments
AK to NL south to OR, MT, IN and GA (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 74

(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
Moist coniferous forest; valleys to lower subalpine (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).


References
  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
  • Web Search Engines for Articles on "Roundleaf Orchid"
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Citation for data on this website:
Roundleaf Orchid — Platanthera orbiculata.  Montana Field Guide.  .  Retrieved on , from