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BFNA | Family List | BFNA Vol. 1 | Ditrichaceae

Pseudephemerum (Lindberg) I. Hagen, K. Norsk. Vid. Selsk. Skrift. 1910(1): 45. 1910.

[Greek pseudes, false, and ephemeros, short-lived; similar to the genus Ephemerum]

Kwok Leung Yip

  • Pleuridium sect. Pseudephemerum Lindberg

    Stem with central strand. Leaf reflexed-recurved, lanceolate, lacking differentiated alar cells, base sheathing, cells thin-walled, aerolation lax, pellucid; costa serrulate abaxially; margins mostly serrulate at apex but occasionally to the base, doubly toothed mostly at angles acute to the long axis. Sexual condition synoicous; antheridia in axils of leaves, becoming lateral after indeterminate growth of the stem. Capsule cleistocarpous, immersed in perichaetial leaves; apiculus short, acuminate. Seta very short. Calyptra cucullate.

    Species 1 (1 in the flora): North America; South America; Africa; Europe; Asia; Pacific Islands (New Zealand).

    This genus is placed in the Ditrichaceae because the chromosome number of n = 13 (E. Lawton 1971) is similar to that of Ditrichum, the type genus of the family. A recent study (M. Stech 1999) supported the relationship between Pseudephemerum and Trichodon, both of the Ditrichaceae.

    SELECTED REFERENCES

    Lawton, E. 1971. Moss Flora of the Pacific Northwest. Nichinan. 362 pp.+ 195 plates. Nyholm, E. 1986. Illustrated Flora of Nordic Mosses, Fasc. 1. Lund. 72 pp. Stech, M. 1999. Molekulare Systematik haplolepider Laubmoose (Dicrananae, Bryopsida). Inaugural-Dissertation zur Erlangung der Doktorw├╝rde, Freien Universit├Ąt Berlin.

    Lower Taxon

    Related Synonym(s):


     

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