Leptobryum (Schimp.) Wilson

 ALA  NSL [legitimate]
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Wilson, W.M. (1855), Bryologia Britannicae: 219

Nomenclature

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Etymology

From the Greek lepto (delicate or slender) and bryon (a moss), in reference to the delicate leaves of these mosses.

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Description

Synoicous, sometimes dioicous. Plants small, in dense tufts, radiculose at the base. Stems slender, unbranched. Rhizoids coloured, papillose. Upper leaves long, in comal tufts, crisped when dry, setaceous from a lanceolate base; margin entire or distantly denticulate above; leaf base sheathing. Lower leaves distant, small, lanceolate; costa single, broad, flat, percurrent or failing below apex. Gemmae sometimes present in leaf axils or as tubers on rhizoids.

Perichaetial leaves undifferentiated. Calyptra cucullate, smooth, glabrous. Setae long, thin, flexuose. Capsules strongly inclined to pendulous, pyriform with a long narrow neck, glossy; operculum convex, apiculate. Peristome double; exostome teeth 16, lanceolate-acuminate, yellowish, densely papillose, trabeculate; endostome segments hyaline, finely papillose, c. as long as teeth or shorter; segments keeled and perforate; basal membrane high; cilia in 3s (sometimes in 4s), appendiculate. Spores globose, papillose.

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Chromosome Numbers

n = 20, 21, 22, 33, according to R. Fritsch, Bryophyt. Biblioth. 40: 192 (1991).

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Habitat and Distribution

This genus of two species is represented in Australia by the weedy and cosmopolitan Leptobryum pyriforme.

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Nomenclature And Typification

Leptobryum (Schimp.) Wilson, Bryol. Brit. 219 (1855); Bryum subg. Leptobryum Schimp., in Bruch, Schimper & Gümbel, Bryol. Eur. 4: 1 (1851). Type: Leptobryum pyriforme (Hedw.) Wilson

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Bibliography

Arts, T. (2001). The moss genus Leptobryum and the identity of Pohlia integra. Journal of Bryology 23: 325–330.

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Source

H.P. Ramsay (2012),  Australian Mosses Online. 43. Meesiaceae: Leptobryum. Australian Biological Resources Study, Canberra. Version 13 June 2012. 

First published as: H.P. Ramsay (2006), Meesiaceae: Leptobryum, Fl. Australia 51: 182–184. Australian Biological Resources Study, Canberra & CSIRO Publishing, Melbourne.

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© Copyright Commonwealth of Australia, 2023
Last updated: John Busby; Jan 28, 2024 5:02 Status: Partial

Author - H.P. Ramsay

Editor(s) - P.M. McCarthy (2012); A.E. Orchard (March 2019)

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Cite this profile as: H.P. Ramsay (2024) Leptobryum. In: Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water, Canberra. https://profiles.ala.org.au/opus/boa/profile/Leptobryum [Date Accessed: 04 April 2025]