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Mingan Island Moonwort is a small perennial fern with a single aboveground frond. The frond varies in height, but may reach about 20 cm. It is divided into two segments which share a common stalk, and it is usually a deep, dull green and somewhat fleshy. The sterile segment is once pinnatifid with up to 10 usually well separated pairs of pinnae. The pinnae are variable; they are generally narrow...

Stiff club-moss, a perennial, has elongated horizontal stems trailing on the ground, rooting at intervals, mostly unbranched. Upright shoots are clustered, mainly unbranched or sparsely branched near the base, 1.2-1.6 cm in diameter and to 20 cm or more in height; annual bud constrictions abrupt and conspicuous. Lateral branchlets few but without the annual constrictions. Leaves dark green, spre...

Western Moonwort is a small perennial fern with a single erect frond, 3-13 cm high. It is divided into a sterile segment and a fertile segment. The sterile segment has a stalk 0-4 mm long, and a broadly lance-shaped to triangular blade that is pinnately divided with 1-6 pairs of closely adjacent leaflets (pinnae). The basal pinnae are usually partly to wholly pinnately divided and are larger tha...