Flora of North America species comparison

leaves ± catenulate when dry, not homomallous, ovate, abruptly narrowed to apex, concave, not plicate, 0.4–1.2 mm, 1.5–2:1;

base flaring;

margins plane or rarely recurved proximally, entire;

apex short-acuminate, sometimes falcate;

costa usually double, or single, 2-fid, or sometimes ecostate, weak, not reaching mid leaf;

medial laminal cells 1–2(–3):1, walls firm, not incrassate.

leaves not catenulate when dry, homomallous, ovate to lanceolate, abruptly narrowed to apex, weakly concave, not or weakly plicate, 0.3–1.5 mm, 2–3:1;

base not flaring or cordate;

margins plane or rarely recurved proximally, finely serrulate distally;

apex short-acuminate to acuminate, sometimes falcate;

costa single or occasionally 2-fid distally, moderately strong, usually to mid leaf;

medial laminal cells 2:1, walls incrassate.

ovate to suborbicular, 0.4–0.8 mm;

laminal cell walls moderately incrassate.

ovate to suborbicular, 0.3–1 mm;

laminal cell walls incrassate.

red-brown, 0.1–0.2 cm.

inclined, subcylindric, asymmetric, 1.5–2.5(–3) mm.

10–18 µm.

leaves broadly ovate or suborbicular.

leaves ovate or orbicular.

unknown.