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3. Leskea obscura Hedwig, Sp. Musc. Frond. 223, plate 57, figs. 1-9. 1801.
Leskea cardotii Kindberg; L. obtusa Renauld
Plants dark green or brownish. Stems with branches spreading, loosely foliate, not curved at apices. Stem and branch leaves similar. Stem leaves [occasionally very slightly plicate], not much longer than broad, 0.9-1.2 mm; apex rounded-obtuse to sometimes acute or short-acuminate. Branch leaves remote, elliptic or broadly oblong-ovate, not plicate, 0.4-0.8 mm; margins erect, not revolute, slightly incurved when dry; apex rounded-obtuse; costa ending 8-10 cells before apex; distal laminal cells 6-9µm, indistinctly bulging-papillose abaxially. Seta yellow to orange-brown, 0.5-1.2 cm. Capsule yellow-brown, oblong-cylindric, straight, 1.5-2.3 mm; annulus 2-or 3-seriate; operculum rounded-conic, blunt; exostome teeth yellow; endostome segments less than 1/3 exostome length. Spores 11-18 µm, very finely papillose.
Capsules mature Mar-Nov. Base and lower trunks of hardwood trees, bald cypress, pine, logs, flood plains, rock; low to moderate elevations (20-400 m); Alta., Man., Ont., Que.; Ala., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.J., N.C., Ohio, Okla., Pa., S.C., Tenn., Tex., Va., W.Va., Wis.
Leskea obscura is more common in eastern North America. Leskea obscura is distinguished from L. gracilescens by its smooth, concave, blunt, rounded-obtuse leaves with erect margins, exostome teeth 0.2-0.3 mm, longer than endostome segments, and operculum that is distinctly blunt.
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