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Montana Field Guide

Montana Field Guides

Least Moonwort - Botrychium simplex

Species of Concern

Global Rank: G5
State Rank: S2

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 6

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General Description
Trophophore light green, lanceolate, to 5 cm long with up to 7 pairs of ascending, fan-shaped pinnae with wavy margins; the lowest often deeply divided and overlapping the ones above. Sporophore 1 to 2 times pinnate, 1 to 8 times length of trophophore (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Phenology
Leaves appearing in midspring to early fall.

Species Range
Present
 


Range Comments
In MT in some western counties (see General Distribution), but Donald Farrar (Iowa State University, unpublished ms) does not include the species for MT, its nearest occurrences in his view being eastern OR, the Black HIlls, and the southern Rockies of WY, CO and NM. Widespread farther east from MN and southern ON to Greenland, and south through Appalachian Mountains to TN and VA.

Summary of Observations Submitted for Montana
Number of Observations: 21

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Relative Density

Recency

 

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



Habitat
Various mesic sites from low to moderate elevations, including roadsides and other disturbed habitats. Sites are generally open with montane meadows and grasslands being the most common habitats occupied by the species.

Ecological Systems Associated with this Species

References
  • Additional ReferencesLegend:   View Online Publication
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    • Farrar, Donald. 2011. Moonwort (Botrychium) Systematics. Ada Hayden Herbarium. Iowa State University.
    • Idaho Native Plant Society. 1993. Federal candidate (C1 and C2) and listed rare plants of Idaho. unpaginated.
    • Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Mantas, M. and R.S. Wirt. 1995. Moonworts of western Montana (Botrychium subgenus Botrychium). Flathead National Forest. 103 pp.
    • Wagner, W.H., and E.S. Wagner. 1983. Genus communities as a systematic tool in the study of new world Botrychium (Ophioglossaceae). Taxon 32(1): 51-63.
  • Web Search Engines for Articles on "Least Moonwort"
  • Additional Sources of Information Related to "Adder's-Tongue / Moonworts"
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Citation for data on this website:
Least Moonwort — Botrychium simplex.  Montana Field Guide.  .  Retrieved on , from