Horizontal stems flat on ground, 4--17 X 0.3--0.8 cm, stems (excluding leaves) thick, 1--1.5 mm diam.; leaves monomorphic, vertically ascending, further ascending when dry, 4--6 X 0.8--1 mm, marginal teeth absent. Upright shoots 1, 9--13 X 0.4--0.5 cm; strobilus 1/5--1/3(--1/2) total length; leaves strongly appressed, 3.5--6 X 0.3--0.8 mm, marginal teeth absent. Strobili 20--40 X 4--8 mm. Sporophylls appressed, 3--4 X 0.2--0.5 mm, marginal teeth absent. 2 n = 312. Wet, acidic ditches and borrow pits; of conservation concern; 0--200 m; Mich. The distinctive Lycopodiella subappressa and L . margueritae are sexual polyploids. The full geographic distribution of L . subappressa is still unknown.