Yakutat Moonwort - Botrychium yaaxudakeit
State Rank Reason (see State Rank above)
A globally rare species, recently documented in Montana from Glacier National Park.
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).
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northwest BC, with disjunct occurrences in northeastern OR and east-central CA (Donald Farrar, Iowa State University, unpublished ms.).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
Various open, mesic habitats.
- Additional ReferencesLegend: View Online Publication
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- Farrar, Donald. 2011. Moonwort (Botrychium) Systematics. Ada Hayden Herbarium. Iowa State University.
- Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.