Leaves and stems:

The leafy frond, called a trophophore, is single near the top of the stem, oblong in outline, with 3 to 6 pairs of leaflets (pinnae) more or less evenly distributed along the stalk, often well separated from each other. Pinnae may or may not fold in towards the stalk. The trophophore is 1.5 to 4 cm (to 1½ inches) long, rarely longer, held erect, the stalk 2 to 15 mm (to ~½ inch) long. The stem below the tropophore is 1.5 to 5 cm (to 2 inches) long.

Pinnae are all ascending, spoon to wedge-shaped, the sides straight or concave, the curvature mostly strongest at the base, and span an angle of 45 to 70 degrees, occasionally more or less. The tip edge is usually toothy. The terminal pinna is often notched into spreading squarish or wedge-shaped lobes; larger pinnae lower on the stalk may also be lobed.

Spores:

At the top of the stem is the fertile frond, called a sporophore, 2 to 6 cm (to ~2½ inches) long, rising above the tropophore at the end of a stalk .7 to 2.5 cm (to 1 inch) long, roughly half as long as the tropophore. The sporophore typically has numerous short branches, each with a few to several round capsules of spores (sporangia) that mature starting in June then turn brown when spores are released by the end of July. Sometimes a few sproangia also develop on the lowest pinnae pair of the tropophore.

Notes:

Upswept Moonwort has a wide distribution in North America, but is one of the rarer Botrychiums in Minnesota. Like many Moonworts, it is known primarily as a forest species, but in Minnesota it appears to have a preference for the transition zones between forest and the moister soils of wet meadows and lake shores, though it has also been found in abandoned homesteads and old mine basins. According to the DNR, genetic testing has revealed two genotypes, with the Minnesota and Vermont populations distinctly different from those in western North America and eastern Canada. Cool. Due to the small size of populations as well as the small number of populations, it was listed as Endangered in 2013.

Its typical form has a stalked tropophore with 3 to 6 pairs of pinnae that are all ascending, pretty evenly spaced, span an angle of 45 to 70 degrees (occasionally more, or less on smaller pinna), are spoon to wedge-shaped, straight or concave on the sides, and tips are mostly toothed, the larger pinnae and the terminal pinna frequently notched into spreading, squarish or wedge-shaped lobes. The sporophore stalk is about half as long as the tropophore at maturity.

Most similar is B. minganense (Mingan Moonwort), which has up to 10 pinnae pairs, pinnae span 60 to 120 degrees, and their tips tend to be smooth, scalloped or shallowly notched with more rounded lobes. B. campestre (Prairie Moonwort) has a shorter sporophore stalk, usually ¼ or less as long as the tropophore, pinnae rarely exceed 45 degrees, and the tropophore is stalkless or nearly so. B. spathulatum (Spatulate Moonwort), very rare in Minnesota, has a sporophore stalk nearly as long as the tropophore at maturity and a stalkless tropophore with the basal pinnae pair often clasping the sporophore stalk.

The shape of the pinnae may be similar to other Botrychiums as well, but these can all be variable on individuals so it's helpful to examine multiple plants within a population (if you can find them). Having said that, Botrychium identification is difficult even for the experts so don't be discouraged if you struggle to get it down to species.