Flora of North America species comparison

leaves 0.7–1 mm (to 1.2 mm in hemiisophyllous forms) elongate-triangular to triangular-lingulate, apex obtuse-erose, to apiculate; usually fibrillose at least apically; in hemiisophyllous forms spreading and in anisophyllous forms appressed;

hyaline cells often septate at base.

leaves to 1.1 × 0.7 mm, commonly hemiisophyllous;

hyaline cells non-ornamented, mostly 1–2-septate.

moderately long and tapering, unranked to weakly 5-ranked, leaves not much elongated at distal end.

short and blunt at distal end, leaves loosely spreading.

1–1.7 mm, ovate-lanceolate, undulate and recurved when dry;

hyaline cells on convex surface with 3–10 round pores per cell in the cell angles and free, on concave surface with round wall thinnings in the ends and angles.

ovate, to 2.2 × 1.1 mm; ovate, hyaline cells non-ornamented, on proximal half of convex surface with small ringed pores or pseudopores in groups of three where the corners join and pseudopores along the commissures; chlorophyllous cells narrowly rectangular, lenticular to narrowly trapezoidal in transverse section; exposed equally on both surfaces or more broadly on concave surface;

end walls not thickened.

unknown.

dioicous.

with numerous pseudostomata.

not seen.

25–39 µm;

surface smooth to irregularly and finely papillose;

indistinct Y-mark on distal surface;

proximal laesura more than 0.6 spore radius.

fascicles with 2 spreading and 2–3 pendent branches.;

branch stem cortex enlarged and with conspicuous retort cells.

fascicles with 2 spreading and 1–2 pendent branches.;

branch stems with hyaline cells non-ornamented, no or weak funnel-like projection of end walls of cortical cells, cortical cells with one large pore per cell on superficial wall.