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BFNA | Family List | BFNA Vol. 1 | Disceliaceae | Discelium

Discelium nudum (Dickson) Bridel, Bryol. Univ. I: 366. 1826.

Authors: W. B. Schofield

  • Bryum nudum Dickson

    Plants gregarious to widely spaced, obvious only when sporophytes present on persistent protonema.

    Capsules mature spring. Moist silty to fine sandy banks of somewhat shaded sites; 5--1500 m; Alta., B.C., N.S., N.W.T., Que.; Calif., Ill., Mass., N.J., N.Y., Ohio, Pa., Wash.

    This is a very distinctive species: the red--brown peristome on the subspherical to elongate horizontal capsule arising on a twisted seta from a reduced brownish gametophyte and persistent green protonema make it unlike any other North American moss. On the Pacific coast in southwestern British Columbia and adjacent Washington, the sporophyte is often 4 to 5 times the size noted in the rest of its world range. The capsules are often elongate rather than subspheric and setae can exceed 3 cm., compared to less than 1 cm. elsewhere in its range.


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