Botrychium minganense
Mingan moonwort

Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Colorado and to Maine across the northern tier of states

Habitat: Mesic, montane to subalpine meadows, and seeps, and in duff under Thuja plicata.

Spores: June-Agust

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Terrestrial perennials up to 15 cm, from 10 or fewer yellow to brown roots 0.5-1.5 mm in diameter at 1 cm from base.


Trophophore blade dull green, oblong to linear, 1-pinnate, to 10 cm long and 2.5 cm broad, firm to herbaceous, on stalk 0-2 cm, up to 1/5 the length of rachis; trophophore pinnae in up to 10 pairs, horizontal to somewhat spreading, space between 1st and 2nd pinnae equal to or longer than space between 2nd and 3rd pairs, basal pinna pair approximately same size and cutting as adjacent pair, sometimes basal pinnae and some distal pinnae elongate, lobed to tip, nearly orbicular to fan-shaped to ovate, sides slightly concave, margins nearly entire to shallowly crenate or occasionally lobed, apex rounded, venation like ribs of fan with short midrib; sporophores 1-pinnate or 2-pinnate in large and robust specimens, 1.5-2.5 times the length of the trophophore.


Sporangium nearly completely exposed, borne in 2 rows on sporophore branches; spore surfaces wrinkled and somewhat warty.

Accepted Name:
Botrychium minganense Vict.
Publication: Proc. & Trans. Roy. Soc. Canada. ser. 3, 21: 331. 1927.

Synonyms & Misapplications:
Botrychium lunaria (L.) Sw. var. minganense (Vict.) Dole
Botrychium onondagense Underw., misapplied
Additional Resources:

PNW Herbaria: Specimen records of Botrychium minganense in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Botrychium minganense checklist entry.

OregonFlora: Botrychium minganense information.

E-Flora BC: Botrychium minganense atlas page.

CalPhotos: Botrychium minganense photos.

USDA Plants: Botrychium minganense information.

65 photographs:
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