General:
Deciduous perennial, 3-15 cm tall.

Trophophores:
Triangular-shaped to narrowly oblong, dull, grey-green, the stalks up to 1/4 the length of the trophophores; blades 1- to 2-pinnate, up to 6 cm long and up to 5 cm wide; pinnae to 6 pairs, usually approximate or overlapping, with entire or slightly lobed margins; the basal pair of pinnae, dissimilar in size, commonly much larger and more divided than the adjacent pair.

Sporophores:
1- to 3-pinnate, 2-3 times length of trophophores, with a single midrib, this midrib sometimes with 2 smaller, less conspicious ribs.

Source:  The Illustrated Flora of British Columbia

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Illustration Source:  The Illustrated Flora of British Columbia

Synonyms and Alternate Names:
Botrychium lunaria subsp. occidentale A.& D. L÷ve & Kapoor
Botrychium matricariifolium subsp. hesperium Maxon & Clausen
Botrychium matricariifolium var. hesperium (Maxon & Clausen) Broun