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Montana Field Guide

Montana Field Guides

Yakutat Moonwort - Botrychium yaaxudakeit

Species of Concern

Global Rank: G3G4
State Rank: S1
* (see State Rank Reason below)

Agency Status
MNPS Threat Rank:

External Links

State Rank Reason (see State Rank above)
A globally rare species, recently documented in Montana from Glacier National Park.
General Description
Plants 8-25 cm tall; common stalk 1-5 cm long. Trophophores green, leathery; stalks 0-0.5 cm long; blades ca. 1.7-11 cm long, ca. 1.2-6 cm wide at thh base, oblong to ovate, once pinnate. Pinna pairs 4-7, angled toward the apex, strongly overlapping one another, the anterior portion overlapping the rachis. Basal pinnae 7-30 mm long, 9-32 mm wide, short-stalked, fan-shapped and spanning an arc of 180-250 degrees, usually symmetrical; basiscopic inner margin strongly recurved; outer pinna margins entire to undulate, occasionally denticulate or shallowly cleft with angular sinuses. Sporophores 8-18 cm long; sporophore stalks 5-9 cm long and longer at maturity than the length of the tropophore; sporangia-bearing portion erect, 1-2 pinnate, broadly lanceolate to narrowly ovate in outline, the branches 6-8, basal branches ascending and not twisted (adapted from Stenvold et al. 2002).

Species Range

Range Comments
In MT only from Glacier County; AK and KT and northwest BC, with disjunct occurrences in northeastern OR and east-central CA (Donald Farrar, Iowa State University, unpublished ms.).

Summary of Observations Submitted for Montana
Number of Observations: 2

(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)

Various open, mesic habitats.

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Citation for data on this website:
Yakutat Moonwort — Botrychium yaaxudakeit.  Montana Field Guide.  .  Retrieved on , from