Blade convex and rugulose in life; ultimate segments angular, acute and more coarsely and irregularly toothed or cleft; otherwise much like no. 5 [Botrychium multifidum (S. G. Gmel) Rupr.]; 2n=90. Woods, moist pastures, and swampy places; N.H., Conn., and s. Que. to Wis. and Minn. Rare.