E-Flora BC: Electronic Atlas of the Flora of British Columbia

General:
Deciduous perennial, 3-15 cm tall.

Sporophores:
2-pinnate, about 2 times length of trophophores.

Trophophores:
Broadly triangular or egg-shaped, unstalked or short stalked, 1- to 2-pinnate, up to 8 cm long; pinnae to 8 pairs, approximate or overlapping, with entire or slightly lobed margins and rounded tips, the lowest similar in size.

Notes:
The only North American collections of Botrychium boreale Milde have been recently collected in Kootenay National Park, SE BC (W.H. Wagner, pers. comm.). It is difficult to separate from B. pinnatum, but the lowermost pinnae have shallow, narrow sinuses (they are wide and deep in B. pinnatum).