Flora of North America species comparison

leaves triangular-lingulate, 1.2–1.6 mm, broadly apex acute to narrowly truncate and toothed, border narrow or indistinct at base (less than 0.25 the width);

hyaline cells rhomboid, mostly 0–1-septate;

convex surface with membrane pleats, concave surface with 1–3 rounded membrane gaps occupying most of cell.

leaves lingulate to lingulate-triangular, 0.7–1.5 mm (to 3 mm in isophyllous forms), apex erose;

hyaline cells mostly 1–septate but in a few cells with 2–3 parallel septations, efibrillose to fibrillose throughout, pores present in hemiisophyllous and isophyllous forms.

somewhat 5-ranked.

straight to somewhat curved, with spreading leaves.

ovate-lanceolate, 1.3–2 mm, strongly concave, apex strongly involute;

margins entire to somewhat toothed near apex, hyaline cells on convex surface with numerous ringed elliptic pores (6–10) along commissures, concave surface mostly aporose except near margins;

Sexual condition dioicous or monoicous.

variable, broadly ovate to ovate-lanceolate, 1.3–5 mm; straight, hyaline cells on the convex surface with 4–8 µm round to elliptic pores in nearly continuous rows along the commissures, the concave surface aporose or with some porosity as on the convex surface.

unknown.

not seen.

21–23 µm; minutely papillose.

not seen.

fascicles with 2 spreading and 1–2 pendent branches.

fascicles with 2 spreading and 2 pendent in emergent forms, these reduced in aquatic forms to 2 per fascicle.