Home Moss World Flora
Name Search
Family List
Generic List
Species List
Leucobryaceae Schimp. Search in NYBG Virtual HerbariumAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font
 

Published In: Corollarium Bryologiae Europaeae 19. 1856. (Coroll. Bryol. Eur.) Name publication detail
 

Project Name Data (Last Modified On 10/18/2013)
Acceptance : Accepted
Note : By Wilbur Peterson
Project data     (Last Modified On 10/18/2013)
Discussion: The family is presented here in the inclusive sense of Brotherus (1924). However, Fleischer (1904-23) distributed the same genera into the Leucobryaceae in the Dicranales and the Leucophanaceae in the Pottiales. There is no question that Leucobryum belongs in the Dicranaceae with such genera as Paraleucobryum, Brothera, and Campylopus. Yet the thick, fleshy costa consisting of a median layer of green cells enclosed by large, empty hyaline cells may hold the family together in an artificial assemblage. In peristome structure the genera, for the most part, show a relationship to the Dicranales, but Octoblepharum, in spite of a leaf structure similar to that of Leucobryum and rather like that of Paraleucobryum has peristome teeth that are non-dicranoid. It seems likely, therefore, Paraleucobryum, together with Leucophanes and Exodictyon, should be linked to Calymperes and Syrrhopodon in the Pottiales. Andrews (1947) actually merged the Leucobryaceae in Fleischer's sense with the Dicranaceae and the Leucophanaceae with the Calymperaceae. (But see Robinson, 1990, for an opposing view.)
Reference Source:

 

Export To PDF Export To Word
Plants in pale, greenish, whitish, or brownish tufts. Leaves crowded, erect to squarrose-recurved, sometimes flexuose or incurved to falcate-secund, thick and fleshy, lanceolate to ligulate from a somewhat broader base; costa filling the leaf point and most of the base, consisting of a ± median layer of small chlorocysts enclosed on both surfaces by 1 or more layers of large, empty leucocysts; chlorocysts in surface view loosely reticulate in arrangement and rectangular or bead-like, in section 3-4-angled; leucocysts rectangular, with 1 or more large pores on connecting walls, in section not or slightly bulging; lamina restricted to the leaf base and consisting of 1-20 rows of hyaline cells on either side of the costa. Setae single, generally straight; capsules immersed or (more often) exserted, ± erect and symmetric or nodding and asymmetric, often strumose, usually ribbed when dry; annulus usually none; operculum short- to long-rostrate; peristome single (or absent), of 8 or 16 lanceolate, bifid teeth, vertically striolate (usually pitted-striolate), papillose, or smooth. Spores lightly papillose. Calyptrae mitrate or cucullate, naked, rarely ciliate-fringed at base.
 

 

 
 
© 2024 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110