Bartramia calcarea Bruch & Schimper, Bryol. Europ. 4: 49, plate 325. 1842

Plants large, in loose or occasionally compact tufts, bright green to yellowish, brownish proximally. Stems 4-8 cm, erect, simple, tomentose proximally. Leaves , appressed on sterile and female stems, secund when dry, erect-spreading to falcate spreading when moist, ovate-lanceolate to lanceolate, 1.3-3 mm; margins revolute, serrulate nearly throughout, teeth paired on mature leaves; apex evenly and gradually acuminate; costa subpercurrent to short-excurrent, <600 µm wide at base>, distal abaxial surface weakly prorulose; laminal cells prorulose at proximal ends; basal cells rectangular, shorter, broader than distal; ; distal cells linear, 20-40 × 3-5µm. Specialized asexual reproduction absent. Sexual condition dioicous; perigonia discoid. Seta 4 cm, straight or flexuose. Capsule 2-3.5 mm. Spores subreniform, 22-25 µm.

Moist areas; low to moderate elevations; Greenland; Europe; Asia; Africa.

Philonotis calcarea is a member of the P. fontana complex; it is essentially an Old World species that enters the flora area only in southern Greenland. Its distinguishing features include falcate-secund, plicate leaves, very stout costa, and lax, pellucid, and quite large juxtacostal cells.