Flora of North America species comparison

pale green to yellowish;

superficial cortex of 2 layers of enlarged, thin-walled and well differentiated cells.;

stem leaves triangular, triangular-lingulate to lingulate, more than 0.8 mm, appressed, apex obtuse to broadly obtuse, erose to fimbriate;

hyaline cells efibrillose and nonseptate.

leaves triangular-lingulate, 1.2–1.4 mm;

apex with a deep lacerate split;

hyaline cells aporose, efibrillose and often septate.

straight and often tapering, often 5-ranked, leaves not much elongate at distal end of branches.

unranked to rarely 5-ranked, branch leaves only weakly undulate, but sharply recurved at the apex, leaves not much elongated at distal end.

ovate-lanceolate, 1.4–2 mm, straight; slightly undulate and sharply recurved;

margins entire;

hyaline cells on convex surface with 1 pore per cell at cell apex, concave surface with round wall thinnings in the cell ends and angles; chlorophyllous cells triangular in transverse section and well-enclosed on concave surface.

ovate-lanceolate; 2–2.6 mm; straight; weakly undulate but strongly recurved, hyaline cells on convex surface with very large irregular pores (formed from the confluence of several smaller pores) at the cell apex, concave surface with large round wall thinnings in the cell angles; chlorophyllous cells triangular to trapezoidal in transverse section, apex normally slightly exposed on concave surface.

dioicous.

dioicous.

22–28 µm;

papillose on both surfaces;

proximal laesura more than 0.5 spore radius.

22–28 µm;

proximal surface noticeably papillose, distal surface smooth or with fewer papillae;

proximal laesura more than 0.5 the length of the radius.

fascicles with 2 spreading and 2 pendent branches.;

branch stems green, cortex enlarged with conspicuous retort cells.

fascicles with 2 spreading and 2 pendent branches.;

branch stem green, cortex enlarged with retort cells.