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FNA | Family List | FNA Vol. 27 | Funariaceae | Physcomitrium

3. Physcomitrium immersum Sullivant in A. Gray, Manual. 648. 1848.

Plants light green. Stems 2-3(-4) mm. Leaves obovate to ovate-lanceolate, distal leaves 2-3 mm; margins toothed or occasionally smooth distally; costa sub-percurrent to short-excurrent. Specialized asexual reproduction absent. Seta 0.5-1.2 mm. Capsule immersed, 1-1.2 mm, broadly cupulate; neck short, indistinct; exothecial cells irregular hexagonal or oblong, walls somewhat unevenly thickened; suboral cells consisting of 1-3 rows of short-rectangular cells. Spores 30-38 ┬Ám, papillose.

Capsules mature late fall-spring. Wet soil in disturbed places; moderate to high elevations; B.C., N.B., N.S., Ont., Que.; Colo., Iowa, Ky., La., Md., Minn., N.J., Oreg., Pa., Tex., Wash., Wis.; South America.

Physcomitrium immersum is easily recognizable by its immersed, broadly cupulate capsules that are usually clearly visible within the spreading leaves.


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